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The Clinical Study of the Safety and Efficacy of Istaroxime in Treatment of Acute Decompensated Heart Failure

The Clinical Study of the Safety and Efficacy of Istaroxime in Treatment of Acute Decompensated Heart Failure - A Multicenter, Randomized, Double-blind, Placebo Controlled, Parallel Group Clinical Study

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02617446
Enrollment
120
Registered
2015-12-01
Start date
2015-12-31
Completion date
2019-02-06
Last updated
2023-05-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acute Decompensated Heart Failure

Keywords

safety, efficacy, istaroxime

Brief summary

To assess the safety, tolerability and efficacy of two different doses of istaroxime, a new agent with lusitropic and inotropic activities that improves the cardiac contraction-relaxation cycle. The 2 doses of istaroxime (0.5 and 1.0 µg/kg/min) will be infused via i. v. for 24 hours in comparison with placebo, in treatment of Chinese and Italian patients with Acute Decompensated Heart Failure.

Detailed description

To assess the safety, tolerability and efficacy of two different doses of istaroxime (0.5 and 1.0 µg/kg/min) in comparison with placebo, including cardiovascular and renal tolerability, as well as changes in biological markers such as N-terminal prohormone brain natriuretic peptide (NT-proBNP) and troponin T (cTnT). The study will be conducted in 96 Chinese and Italian patients with Acute Decompensated Heart Failure. This is a phase II, multicenter, randomized, double-blind, placebo-controlled, parallel group study. Patients were randomly assigned to one of two doses of istaroxime or placebo in a 2:1 ratio within two sequential cohorts of 60 patients each. This 31-day study includes a screening period (Days -1), a treatment period (Day 1), a post-treatment period (Days 2-4), and a follow-up period (which includes one patient visit on Day 30). In all the Italian patients and in a subset of Chinese patients pharmacokinetics and metabolism of istaroxime shall also be studied.

Interventions

DRUGPlacebo

IV of matching saline solution

IV infusion of 0.5 µg/kg/min or 1.0 µg/kg/min istaroxime

Sponsors

Windtree Therapeutics
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Masking description

Double-blind

Intervention model description

Cohort I: Participants enrolled in a 2:1 ratio to istaroxime 0.5 µg/kg/min or placebo. Cohort II: Participants enrolled in a 2:1 ratio to istaroxime 1.0 µg/kg/min or placebo. Cohort I was enrolled first, followed by Cohort II.

Eligibility

Sex/Gender
ALL
Age
18 Years to 85 Years
Healthy volunteers
No

Inclusion criteria

Patients who fulfill the following inclusion criteria at screening will be considered for the study: 1. Signed informed consent; 2. Male or female patients 18-85 years (inclusive); 3. Admission for a recurrent acute decompensated heart failure (ADHF) episode with dyspnea at rest or minimal exertion and need of intravenous diuretic therapy (≥40 mg iv. furosemide); 4. Systolic blood pressure between 90 and 125 mmHg (limits included) without signs or symptoms of hypoperfusion including cardiogenic shock, cold extremities and peripheral vasoconstriction, oliguria/anuria, signs of cerebral hypo perfusion such as confusion; 5. Left ventricular (LV) Ejection fraction (EF) ≤ 40 % measured by 2D-Echocardiography 6. E/Ea ratio \>10 7. BNP ≥ 350pg/mL or NT-pro-BNP ≥1400 pg/mL 8. Adequate echocardiography window (defined as visualization of at least 13/16 segment of the left ventricle);

Exclusion criteria

Any of the following criteria established at screening would render a patient ineligible for the study: 1. Pregnant or breast-feeding women (women of child bearing potential must have the results of a negative pregnancy test recorded prior to study drug administration) 2. Current (within 12 hours prior to screening) or planned (through the completion of study drug infusion) treatment with any iv. therapies, including vasodilators (including nitrates or nesiritide), positive inotropic agents and vasopressors 3. Current or need of mechanical support (intra-aortic balloon pump, endotracheal intubation, mechanical ventilation, or any ventricular assist device), 4. Ongoing treatment with oral digoxin. Patient treated with digoxin within the last week, can be randomised if the plasma concentration of digoxin is tested before randomization and its value will be less than 0.5 ng/ml. 5. History of hypersensitivity to the study medication or any related medication 6. Diagnosis of cardiogenic shock within the past month; 7. Acute coronary syndrome or stroke within the past 3 months; 8. Coronary artery bypass graft or percutaneous coronary intervention within the past month or planned in the next month; 9. Primary hypertrophic or restrictive cardiomyopathy or systemic illness known to be associated with infiltrative heart disease; 10. Cor pulmonale or other causes of right-sided heart failure (HF) not related to left ventricular dysfunction; 11. Pericardial constriction or active pericarditis; 12. Atrial fibrillation with marked irregularities of heart rhythm; 13. Life threatening ventricular arrhythmia or implantable cardioverter-defibrillator (ICD) shock within the past month; 14. Cardiac resynchronization therapy (CRT), ICD, or pacemaker implantation within the past month; 15. Valvular disease as primary cause of HF; 16. Heart rate \>120 bpm or \< 50 bpm 17. Acute respiratory distress syndrome or ongoing sepsis; 18. Fever \>38° 19. History of bronchial asthma or porphyria; 20. Donation or loss of blood equal to or exceeding 500 mL, during the 8 weeks before administration of study medication; 21. Positive testing for HIV, Hepatitis B and/or Hepatitis C; 22. Participation in another interventional study within the past 30 days; 23. The following laboratory

Design outcomes

Primary

MeasureTime frameDescription
Change in E/Ea Ratio24 hoursChange from baseline at 24 hours in the unitless ratio of E (cm/sec) to Ea (or e') (cm/sec) as measured by echocardiogram. The endpoint is the Tissue Doppler echocardiography showing measurement of mitral E/Ea ratio for assessment of diastolic dysfunction. Initially mitral E wave is measured. After that, color Tissue Doppler (tissue velocity imaging or TVI) mode is switched on to assess tissue Doppler. The cursor is placed over the medial mitral annulus and tissue Doppler tracing obtained. This allows Ea velocity to be measured. Higher values are suggestive of a worse outcome; less than 8 is normal.

Secondary

MeasureTime frameDescription
Change in SVI24 hoursChange from baseline at 24 hours in stroke volume index (SVI) by tissue Doppler
Change in E/A Ratio24 hoursChange from baseline at 24 hours in E/A ratio by tissue Doppler
Change in LVEF24 hoursChange from baseline at 24 hours in LV ejection fraction (LVEF) by tissue Doppler
Change in LV End Diastolic Volume24 hoursChange from baseline in left ventricular end diastolic volume (LVEDV) by tissue Doppler
Change in Dyspnea24 hoursMeasured using a visual analog scale (0 to 100). Higher scores indicate less dyspnea.
Change in LV End Systolic Volume24 hoursChange from baseline in left ventricular end systolic volume (LVESV) by tissue Doppler

Other

MeasureTime frameDescription
RBC - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in red blood cells (RBC)
Hematocrit - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in hematocrit
Hemoglobin - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in hemoglobin
White Blood Cells (WBC) - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in WBC
Platelets - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in platelets
Potassium - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in potassium
Change in cTnT24 hoursSafety endpoint: Changes in troponin (cTnT)
Calcium - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in calcium
BUN - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in blood urea nitrogen (BUN)
ALT - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in alanine aminotransferase (ALT)
AST - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in aspartate aminotransferase (AST)
Total Bilirubin - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in total bilirubin
Sodium - ShiftDay 3Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in sodium
Change in eGFR24 HoursSafety endpoint: Change from baseline in estimated glomerular filtration rate (eGFR)
Participants With Clinically or Hemodynamically Significant Episodes of Arrhythmias24 hoursSafety endpoint: Number of participants with incidence of clinically or hemodynamically significant episodes of supraventricular or ventricular arrhythmias detected by continuous ECG dynamic monitoring
PR Interval24 HoursSafety Endpoint: The PR interval, measured in milliseconds, extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization).
QRS Duration24 hoursSafety endpoint: The quasi-random signal (QRS) duration represents the time for ventricular depolarization, normally 0.06 to 0.10 seconds.
QTc Interval24 HoursSafety Endpoint: The corrected QT interval (QTc) on an ECG represents the duration in milliseconds of the ventricular action potential, which physiologically correlates with the duration of the ventricular depolarization and repolarization.
All-Cause Mortality at Day 3030 daysSafety endpoint: Mortality at Day 30

Countries

China, Italy

Participant flow

Pre-assignment details

Screening to assess whether the patient qualified for the study. 144 patients were screened, 22 were determined to be screen failures and additional 2 patients were excluded for not meeting inclusion/exclusion criteria.

Participants by arm

ArmCount
Placebo
IV infusion for 24 hours Placebo: IV of matching saline solution
39
Istaroxime 0.5 µg/kg/Min
Istaroxime via IV infusion for 24 hours Istaroxime: IV infusion of istaroxime 0.5 µg/kg/min
41
Istaroxime 1.0 µg/kg/Min
Istaroxime via IV infusion for 24 hours Istaroxime: IV infusion of istaroxime 1.0 µg/kg/min
40
Total120

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event105
Overall StudyDeath002
Overall StudyLost to Follow-up300
Overall StudyWithdrawal by Subject020

Baseline characteristics

CharacteristicIstaroxime 0.5 µg/kg/MinTotalPlaceboIstaroxime 1.0 µg/kg/Min
Age, Continuous59.73 years
STANDARD_DEVIATION 15.53
56.24 years
STANDARD_DEVIATION 14.98
56.67 years
STANDARD_DEVIATION 16.21
52.23 years
STANDARD_DEVIATION 13.02
Dyspnea73.6 Scores on a scale
STANDARD_DEVIATION 19.49
72.0 Scores on a scale
STANDARD_DEVIATION 20.59
70.8 Scores on a scale
STANDARD_DEVIATION 21.32
71.5 Scores on a scale
STANDARD_DEVIATION 20.95
E/Ea Ratio20.4 Unitless ratio
STANDARD_DEVIATION 7.87
17.5 Unitless ratio
STANDARD_DEVIATION 6.36
17.0 Unitless ratio
STANDARD_DEVIATION 5.33
15.1 Unitless ratio
STANDARD_DEVIATION 5.48
eGFR72.3 ml/min/1.73·m²
STANDARD_DEVIATION 30.93
77.2 ml/min/1.73·m²
STANDARD_DEVIATION 32.36
78.1 ml/min/1.73·m²
STANDARD_DEVIATION 38.33
81.3 ml/min/1.73·m²
STANDARD_DEVIATION 27.01
Left ventricular ejection fraction (LVEF)27.4 % of blood in heart pumped
STANDARD_DEVIATION 6.7
27.4 % of blood in heart pumped
STANDARD_DEVIATION 7.1
26.2 % of blood in heart pumped
STANDARD_DEVIATION 7.4
28.7 % of blood in heart pumped
STANDARD_DEVIATION 7.2
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
24 Participants96 Participants32 Participants40 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
17 Participants24 Participants7 Participants0 Participants
Region of Enrollment
China
24 participants96 participants32 participants40 participants
Region of Enrollment
Italy
17 participants24 participants7 participants0 participants
Sex: Female, Male
Female
7 Participants18 Participants5 Participants6 Participants
Sex: Female, Male
Male
34 Participants102 Participants34 Participants34 Participants
Stroke Volume Index25.9 ml/m²
STANDARD_DEVIATION 7.1
21.6 ml/m²
STANDARD_DEVIATION 6.89
21.6 ml/m²
STANDARD_DEVIATION 7.73
17.1 ml/m²
STANDARD_DEVIATION 5.69
Troponin (cTnT)34.2 ng/L
STANDARD_DEVIATION 36.6
36.0 ng/L
STANDARD_DEVIATION 53.6
33.5 ng/L
STANDARD_DEVIATION 33.9
40.4 ng/L
STANDARD_DEVIATION 78.3

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 390 / 412 / 40
other
Total, other adverse events
23 / 3931 / 4133 / 40
serious
Total, serious adverse events
2 / 392 / 416 / 40

Outcome results

Primary

Change in E/Ea Ratio

Change from baseline at 24 hours in the unitless ratio of E (cm/sec) to Ea (or e') (cm/sec) as measured by echocardiogram. The endpoint is the Tissue Doppler echocardiography showing measurement of mitral E/Ea ratio for assessment of diastolic dysfunction. Initially mitral E wave is measured. After that, color Tissue Doppler (tissue velocity imaging or TVI) mode is switched on to assess tissue Doppler. The cursor is placed over the medial mitral annulus and tissue Doppler tracing obtained. This allows Ea velocity to be measured. Higher values are suggestive of a worse outcome; less than 8 is normal.

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (LEAST_SQUARES_MEAN)
Istaroxime 0.5 µg/kg/MinChange in E/Ea Ratio-4.55 Unitless ratio
Placebo Cohort IChange in E/Ea Ratio-1.55 Unitless ratio
Istaroxime 1.0 µg/kg/MinChange in E/Ea Ratio-3.16 Unitless ratio
Placebo Cohort IIChange in E/Ea Ratio-1.08 Unitless ratio
Comparison: Null hypothesis: No difference in E/Ea ratio between istaroxime and placebop-value: 0.02995% CI: [-5.68, -0.32]ANOVA
Comparison: Null hypothesis: No difference in E/Ea ratio between istaroxime and placebop-value: 0.00995% CI: [-3.61, -0.55]ANOVA
Secondary

Change in Dyspnea

Measured using a visual analog scale (0 to 100). Higher scores indicate less dyspnea.

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinChange in Dyspnea9.75 Score on a scale (Visual Analog Scale)Standard Deviation 11.8
Placebo Cohort IChange in Dyspnea9.14 Score on a scale (Visual Analog Scale)Standard Deviation 10.08
Istaroxime 1.0 µg/kg/MinChange in Dyspnea12.09 Score on a scale (Visual Analog Scale)Standard Deviation 14.79
Comparison: Null hypothesis: no difference between treatment groupsp-value: 0.98795% CI: [-5.216, 5.133]Mixed Models Analysis
Comparison: Null hypothesis: no difference between treatment groups.p-value: 0.25195% CI: [-2.168, 8.198]Mixed Models Analysis
Secondary

Change in E/A Ratio

Change from baseline at 24 hours in E/A ratio by tissue Doppler

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (LEAST_SQUARES_MEAN)
Istaroxime 0.5 µg/kg/MinChange in E/A Ratio-0.643 Unitless ratio
Placebo Cohort IChange in E/A Ratio0.133 Unitless ratio
Istaroxime 1.0 µg/kg/MinChange in E/A Ratio-0.654 Unitless ratio
Placebo Cohort IIChange in E/A Ratio0.175 Unitless ratio
Comparison: Null hypothesis: No difference in E to A ratio between istaroxime and placebo participants.p-value: 0.04295% CI: [-1.522, -0.032]ANOVA
Comparison: Null hypothesis: No difference in E to A ratio between istaroxime and placebo participants.p-value: 0.02995% CI: [-1.568, -0.091]ANOVA
Secondary

Change in LVEF

Change from baseline at 24 hours in LV ejection fraction (LVEF) by tissue Doppler

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (MEAN)
Istaroxime 0.5 µg/kg/MinChange in LVEF3.026 % of blood leaving the heart
Placebo Cohort IChange in LVEF1.263 % of blood leaving the heart
Istaroxime 1.0 µg/kg/MinChange in LVEF3.818 % of blood leaving the heart
Placebo Cohort IIChange in LVEF2.833 % of blood leaving the heart
Comparison: Null hypothesis: No difference in LVEF % between istaroxime and placebo participants.p-value: 0.08995% CI: [-0.2751, 3.8014]ANOVA
Comparison: Null hypothesis: No difference in LVEF % between istaroxime and placebo participants.p-value: 0.42395% CI: [-1.4668, 3.4365]ANOVA
Secondary

Change in LV End Diastolic Volume

Change from baseline in left ventricular end diastolic volume (LVEDV) by tissue Doppler

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (LEAST_SQUARES_MEAN)
Istaroxime 0.5 µg/kg/MinChange in LV End Diastolic Volume-0.710 mL
Placebo Cohort IChange in LV End Diastolic Volume0.947 mL
Istaroxime 1.0 µg/kg/MinChange in LV End Diastolic Volume-3.666 mL
Placebo Cohort IIChange in LV End Diastolic Volume-7.611 mL
Comparison: Null hypothesis: No difference in E to A ratio between istaroxime and placebo participants.p-value: 0.58995% CI: [-7.777, 4.461]ANOVA
Comparison: Null hypothesis: No difference in E to A ratio between istaroxime and placebo participants.p-value: 0.42495% CI: [-5.886, 13.774]ANOVA
Secondary

Change in LV End Systolic Volume

Change from baseline in left ventricular end systolic volume (LVESV) by tissue Doppler

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (LEAST_SQUARES_MEAN)
Istaroxime 0.5 µg/kg/MinChange in LV End Systolic Volume-7.105 mL
Placebo Cohort IChange in LV End Systolic Volume-1.736 mL
Istaroxime 1.0 µg/kg/MinChange in LV End Systolic Volume-11.39 mL
Placebo Cohort IIChange in LV End Systolic Volume-11.83 mL
Comparison: Null hypothesis: No difference in LVESV between istaroxime and placebo participants.p-value: 0.1195% CI: [-11.999, 1.262]ANOVA
Comparison: Null hypothesis: No difference in LVEDV between istaroxime and placebo participants.p-value: 0.93195% CI: [-9.735, 10.614]ANOVA
Secondary

Change in SVI

Change from baseline at 24 hours in stroke volume index (SVI) by tissue Doppler

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (LEAST_SQUARES_MEAN)
Istaroxime 0.5 µg/kg/MinChange in SVI5.334 mL/m²
Placebo Cohort IChange in SVI1.649 mL/m²
Istaroxime 1.0 µg/kg/MinChange in SVI5.488 mL/m²
Placebo Cohort IIChange in SVI3.178 mL/m²
Comparison: Null hypothesis: No difference in SVI between istaroxime and placebo participants.p-value: 0.03495% CI: [0.285, 7.083]ANOVA
Comparison: Null hypothesis: No difference in E to A ratio between istaroxime and placebo participants.p-value: 0.0995% CI: [-0.373, 4.992]ANOVA
Other Pre-specified

All-Cause Mortality at Day 30

Safety endpoint: Mortality at Day 30

Time frame: 30 days

Population: Intent-to-Treat

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinAll-Cause Mortality at Day 300 Participants
Placebo Cohort IAll-Cause Mortality at Day 300 Participants
Istaroxime 1.0 µg/kg/MinAll-Cause Mortality at Day 302 Participants
Other Pre-specified

ALT - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in alanine aminotransferase (ALT)

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinALT - ShiftAbnormal to Abnormal4 Participants
Istaroxime 0.5 µg/kg/MinALT - ShiftAbnormal to Normal2 Participants
Istaroxime 0.5 µg/kg/MinALT - ShiftNormal to Normal29 Participants
Istaroxime 0.5 µg/kg/MinALT - ShiftNormal to Abnormal1 Participants
Istaroxime 0.5 µg/kg/MinALT - ShiftMissing3 Participants
Placebo Cohort IALT - ShiftAbnormal to Normal1 Participants
Placebo Cohort IALT - ShiftNormal to Normal31 Participants
Placebo Cohort IALT - ShiftNormal to Abnormal1 Participants
Placebo Cohort IALT - ShiftAbnormal to Abnormal5 Participants
Placebo Cohort IALT - ShiftMissing3 Participants
Istaroxime 1.0 µg/kg/MinALT - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinALT - ShiftAbnormal to Abnormal5 Participants
Istaroxime 1.0 µg/kg/MinALT - ShiftNormal to Normal29 Participants
Istaroxime 1.0 µg/kg/MinALT - ShiftAbnormal to Normal0 Participants
Istaroxime 1.0 µg/kg/MinALT - ShiftNormal to Abnormal2 Participants
Other Pre-specified

AST - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in aspartate aminotransferase (AST)

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinAST - ShiftAbnormal to Abnormal4 Participants
Istaroxime 0.5 µg/kg/MinAST - ShiftAbnormal to Normal3 Participants
Istaroxime 0.5 µg/kg/MinAST - ShiftNormal to Normal28 Participants
Istaroxime 0.5 µg/kg/MinAST - ShiftNormal to Abnormal1 Participants
Istaroxime 0.5 µg/kg/MinAST - ShiftMissing3 Participants
Placebo Cohort IAST - ShiftAbnormal to Normal1 Participants
Placebo Cohort IAST - ShiftNormal to Normal28 Participants
Placebo Cohort IAST - ShiftNormal to Abnormal4 Participants
Placebo Cohort IAST - ShiftAbnormal to Abnormal4 Participants
Placebo Cohort IAST - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinAST - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinAST - ShiftAbnormal to Abnormal3 Participants
Istaroxime 1.0 µg/kg/MinAST - ShiftNormal to Normal24 Participants
Istaroxime 1.0 µg/kg/MinAST - ShiftAbnormal to Normal4 Participants
Istaroxime 1.0 µg/kg/MinAST - ShiftNormal to Abnormal5 Participants
Other Pre-specified

BUN - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in blood urea nitrogen (BUN)

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinBUN - ShiftAbnormal to Normal3 Participants
Istaroxime 0.5 µg/kg/MinBUN - ShiftMissing4 Participants
Istaroxime 0.5 µg/kg/MinBUN - ShiftNormal to Normal11 Participants
Istaroxime 0.5 µg/kg/MinBUN - ShiftNormal to Abnormal7 Participants
Istaroxime 0.5 µg/kg/MinBUN - ShiftAbnormal to Abnormal14 Participants
Placebo Cohort IBUN - ShiftNormal to Normal13 Participants
Placebo Cohort IBUN - ShiftAbnormal to Normal2 Participants
Placebo Cohort IBUN - ShiftAbnormal to Abnormal16 Participants
Placebo Cohort IBUN - ShiftMissing6 Participants
Placebo Cohort IBUN - ShiftNormal to Abnormal4 Participants
Istaroxime 1.0 µg/kg/MinBUN - ShiftMissing5 Participants
Istaroxime 1.0 µg/kg/MinBUN - ShiftAbnormal to Abnormal7 Participants
Istaroxime 1.0 µg/kg/MinBUN - ShiftNormal to Normal14 Participants
Istaroxime 1.0 µg/kg/MinBUN - ShiftNormal to Abnormal6 Participants
Istaroxime 1.0 µg/kg/MinBUN - ShiftAbnormal to Normal8 Participants
Other Pre-specified

Calcium - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in calcium

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinCalcium - ShiftAbnormal to Abnormal3 Participants
Istaroxime 0.5 µg/kg/MinCalcium - ShiftAbnormal to Normal3 Participants
Istaroxime 0.5 µg/kg/MinCalcium - ShiftNormal to Normal24 Participants
Istaroxime 0.5 µg/kg/MinCalcium - ShiftNormal to Abnormal4 Participants
Istaroxime 0.5 µg/kg/MinCalcium - ShiftMissing5 Participants
Placebo Cohort ICalcium - ShiftAbnormal to Normal2 Participants
Placebo Cohort ICalcium - ShiftNormal to Normal26 Participants
Placebo Cohort ICalcium - ShiftNormal to Abnormal2 Participants
Placebo Cohort ICalcium - ShiftAbnormal to Abnormal1 Participants
Placebo Cohort ICalcium - ShiftMissing10 Participants
Istaroxime 1.0 µg/kg/MinCalcium - ShiftMissing6 Participants
Istaroxime 1.0 µg/kg/MinCalcium - ShiftAbnormal to Abnormal4 Participants
Istaroxime 1.0 µg/kg/MinCalcium - ShiftNormal to Normal20 Participants
Istaroxime 1.0 µg/kg/MinCalcium - ShiftAbnormal to Normal9 Participants
Istaroxime 1.0 µg/kg/MinCalcium - ShiftNormal to Abnormal1 Participants
Other Pre-specified

Change in cTnT

Safety endpoint: Changes in troponin (cTnT)

Time frame: 24 hours

Population: Intent-to-Treat

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinChange in cTnT0.23 ng/LStandard Deviation 10.83
Placebo Cohort IChange in cTnT0.51 ng/LStandard Deviation 7.58
Istaroxime 1.0 µg/kg/MinChange in cTnT-4.06 ng/LStandard Deviation 49.97
Other Pre-specified

Change in eGFR

Safety endpoint: Change from baseline in estimated glomerular filtration rate (eGFR)

Time frame: 24 Hours

Population: Safety Population

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinChange in eGFR-0.60 ml/min/1.73·m²Standard Deviation 14.71
Placebo Cohort IChange in eGFR5.19 ml/min/1.73·m²Standard Deviation 16.25
Istaroxime 1.0 µg/kg/MinChange in eGFR7.65 ml/min/1.73·m²Standard Deviation 13.22
Other Pre-specified

Hematocrit - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in hematocrit

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinHematocrit - ShiftAbnormal to Abnormal6 Participants
Istaroxime 0.5 µg/kg/MinHematocrit - ShiftAbnormal to Normal3 Participants
Istaroxime 0.5 µg/kg/MinHematocrit - ShiftNormal to Normal21 Participants
Istaroxime 0.5 µg/kg/MinHematocrit - ShiftNormal to Abnormal7 Participants
Istaroxime 0.5 µg/kg/MinHematocrit - ShiftMissing2 Participants
Placebo Cohort IHematocrit - ShiftAbnormal to Normal7 Participants
Placebo Cohort IHematocrit - ShiftNormal to Normal15 Participants
Placebo Cohort IHematocrit - ShiftNormal to Abnormal3 Participants
Placebo Cohort IHematocrit - ShiftAbnormal to Abnormal14 Participants
Placebo Cohort IHematocrit - ShiftMissing2 Participants
Istaroxime 1.0 µg/kg/MinHematocrit - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinHematocrit - ShiftAbnormal to Abnormal8 Participants
Istaroxime 1.0 µg/kg/MinHematocrit - ShiftNormal to Normal17 Participants
Istaroxime 1.0 µg/kg/MinHematocrit - ShiftAbnormal to Normal6 Participants
Istaroxime 1.0 µg/kg/MinHematocrit - ShiftNormal to Abnormal5 Participants
Other Pre-specified

Hemoglobin - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in hemoglobin

Time frame: Day 3

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinHemoglobin - ShiftAbnormal to Normal1 Participants
Istaroxime 0.5 µg/kg/MinHemoglobin - ShiftNormal to Abnormal5 Participants
Istaroxime 0.5 µg/kg/MinHemoglobin - ShiftAbnormal to Abnormal8 Participants
Istaroxime 0.5 µg/kg/MinHemoglobin - ShiftNormal to Normal23 Participants
Istaroxime 0.5 µg/kg/MinHemoglobin - ShiftMissing2 Participants
Placebo Cohort IHemoglobin - ShiftNormal to Normal13 Participants
Placebo Cohort IHemoglobin - ShiftNormal to Abnormal3 Participants
Placebo Cohort IHemoglobin - ShiftAbnormal to Normal7 Participants
Placebo Cohort IHemoglobin - ShiftAbnormal to Abnormal16 Participants
Placebo Cohort IHemoglobin - ShiftMissing2 Participants
Istaroxime 1.0 µg/kg/MinHemoglobin - ShiftAbnormal to Abnormal6 Participants
Istaroxime 1.0 µg/kg/MinHemoglobin - ShiftNormal to Abnormal2 Participants
Istaroxime 1.0 µg/kg/MinHemoglobin - ShiftNormal to Normal23 Participants
Istaroxime 1.0 µg/kg/MinHemoglobin - ShiftAbnormal to Normal5 Participants
Istaroxime 1.0 µg/kg/MinHemoglobin - ShiftMissing4 Participants
Other Pre-specified

Participants With Clinically or Hemodynamically Significant Episodes of Arrhythmias

Safety endpoint: Number of participants with incidence of clinically or hemodynamically significant episodes of supraventricular or ventricular arrhythmias detected by continuous ECG dynamic monitoring

Time frame: 24 hours

Population: Safety Population

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinParticipants With Clinically or Hemodynamically Significant Episodes of Arrhythmias6 Participants
Placebo Cohort IParticipants With Clinically or Hemodynamically Significant Episodes of Arrhythmias1 Participants
Istaroxime 1.0 µg/kg/MinParticipants With Clinically or Hemodynamically Significant Episodes of Arrhythmias4 Participants
Other Pre-specified

Platelets - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in platelets

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinPlatelets - ShiftAbnormal to Abnormal4 Participants
Istaroxime 0.5 µg/kg/MinPlatelets - ShiftAbnormal to Normal4 Participants
Istaroxime 0.5 µg/kg/MinPlatelets - ShiftNormal to Normal26 Participants
Istaroxime 0.5 µg/kg/MinPlatelets - ShiftNormal to Abnormal3 Participants
Istaroxime 0.5 µg/kg/MinPlatelets - ShiftMissing2 Participants
Placebo Cohort IPlatelets - ShiftAbnormal to Normal1 Participants
Placebo Cohort IPlatelets - ShiftNormal to Normal32 Participants
Placebo Cohort IPlatelets - ShiftNormal to Abnormal2 Participants
Placebo Cohort IPlatelets - ShiftAbnormal to Abnormal3 Participants
Placebo Cohort IPlatelets - ShiftMissing3 Participants
Istaroxime 1.0 µg/kg/MinPlatelets - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinPlatelets - ShiftAbnormal to Abnormal1 Participants
Istaroxime 1.0 µg/kg/MinPlatelets - ShiftNormal to Normal31 Participants
Istaroxime 1.0 µg/kg/MinPlatelets - ShiftAbnormal to Normal0 Participants
Istaroxime 1.0 µg/kg/MinPlatelets - ShiftNormal to Abnormal4 Participants
Other Pre-specified

Potassium - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in potassium

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinPotassium - ShiftMissing1 Participants
Istaroxime 0.5 µg/kg/MinPotassium - ShiftNormal to Normal37 Participants
Istaroxime 0.5 µg/kg/MinPotassium - ShiftNormal to Abnormal1 Participants
Istaroxime 0.5 µg/kg/MinPotassium - ShiftAbnormal to Normal0 Participants
Istaroxime 0.5 µg/kg/MinPotassium - ShiftAbnormal to Abnormal0 Participants
Placebo Cohort IPotassium - ShiftAbnormal to Normal0 Participants
Placebo Cohort IPotassium - ShiftAbnormal to Abnormal0 Participants
Placebo Cohort IPotassium - ShiftNormal to Normal40 Participants
Placebo Cohort IPotassium - ShiftMissing1 Participants
Placebo Cohort IPotassium - ShiftNormal to Abnormal0 Participants
Istaroxime 1.0 µg/kg/MinPotassium - ShiftAbnormal to Abnormal0 Participants
Istaroxime 1.0 µg/kg/MinPotassium - ShiftNormal to Abnormal2 Participants
Istaroxime 1.0 µg/kg/MinPotassium - ShiftAbnormal to Normal0 Participants
Istaroxime 1.0 µg/kg/MinPotassium - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinPotassium - ShiftNormal to Normal34 Participants
Other Pre-specified

PR Interval

Safety Endpoint: The PR interval, measured in milliseconds, extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization).

Time frame: 24 Hours

Population: Safety Population

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinPR Interval184.0 msecStandard Deviation 31.27
Placebo Cohort IPR Interval179.2 msecStandard Deviation 28.11
Istaroxime 1.0 µg/kg/MinPR Interval169.41 msecStandard Deviation 32.72
Other Pre-specified

QRS Duration

Safety endpoint: The quasi-random signal (QRS) duration represents the time for ventricular depolarization, normally 0.06 to 0.10 seconds.

Time frame: 24 hours

Population: Safety Population

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinQRS Duration125.2 msecStandard Deviation 37.11
Placebo Cohort IQRS Duration132.5 msecStandard Deviation 31.59
Istaroxime 1.0 µg/kg/MinQRS Duration127.6 msecStandard Deviation 26.65
Other Pre-specified

QTc Interval

Safety Endpoint: The corrected QT interval (QTc) on an ECG represents the duration in milliseconds of the ventricular action potential, which physiologically correlates with the duration of the ventricular depolarization and repolarization.

Time frame: 24 Hours

Population: Safety Population

ArmMeasureValue (MEAN)Dispersion
Istaroxime 0.5 µg/kg/MinQTc Interval472.8 msecStandard Deviation 41.9
Placebo Cohort IQTc Interval480.8 msecStandard Deviation 55.72
Istaroxime 1.0 µg/kg/MinQTc Interval486.9 msecStandard Deviation 40.18
Other Pre-specified

RBC - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in red blood cells (RBC)

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinRBC - ShiftAbnormal to Abnormal8 Participants
Istaroxime 0.5 µg/kg/MinRBC - ShiftAbnormal to Normal2 Participants
Istaroxime 0.5 µg/kg/MinRBC - ShiftNormal to Normal22 Participants
Istaroxime 0.5 µg/kg/MinRBC - ShiftNormal to Abnormal5 Participants
Istaroxime 0.5 µg/kg/MinRBC - ShiftMissing2 Participants
Placebo Cohort IRBC - ShiftAbnormal to Normal3 Participants
Placebo Cohort IRBC - ShiftNormal to Normal17 Participants
Placebo Cohort IRBC - ShiftNormal to Abnormal3 Participants
Placebo Cohort IRBC - ShiftAbnormal to Abnormal16 Participants
Placebo Cohort IRBC - ShiftMissing2 Participants
Istaroxime 1.0 µg/kg/MinRBC - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinRBC - ShiftAbnormal to Abnormal7 Participants
Istaroxime 1.0 µg/kg/MinRBC - ShiftNormal to Normal21 Participants
Istaroxime 1.0 µg/kg/MinRBC - ShiftAbnormal to Normal4 Participants
Istaroxime 1.0 µg/kg/MinRBC - ShiftNormal to Abnormal4 Participants
Other Pre-specified

Sodium - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in sodium

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinSodium - ShiftAbnormal to Abnormal2 Participants
Istaroxime 0.5 µg/kg/MinSodium - ShiftAbnormal to Normal4 Participants
Istaroxime 0.5 µg/kg/MinSodium - ShiftNormal to Normal23 Participants
Istaroxime 0.5 µg/kg/MinSodium - ShiftNormal to Abnormal9 Participants
Istaroxime 0.5 µg/kg/MinSodium - ShiftMissing1 Participants
Placebo Cohort ISodium - ShiftAbnormal to Normal2 Participants
Placebo Cohort ISodium - ShiftNormal to Normal21 Participants
Placebo Cohort ISodium - ShiftNormal to Abnormal12 Participants
Placebo Cohort ISodium - ShiftAbnormal to Abnormal5 Participants
Placebo Cohort ISodium - ShiftMissing1 Participants
Istaroxime 1.0 µg/kg/MinSodium - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinSodium - ShiftAbnormal to Abnormal8 Participants
Istaroxime 1.0 µg/kg/MinSodium - ShiftNormal to Normal19 Participants
Istaroxime 1.0 µg/kg/MinSodium - ShiftAbnormal to Normal1 Participants
Istaroxime 1.0 µg/kg/MinSodium - ShiftNormal to Abnormal8 Participants
Other Pre-specified

Total Bilirubin - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in total bilirubin

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinTotal Bilirubin - ShiftNormal to Abnormal3 Participants
Istaroxime 0.5 µg/kg/MinTotal Bilirubin - ShiftAbnormal to Abnormal13 Participants
Istaroxime 0.5 µg/kg/MinTotal Bilirubin - ShiftNormal to Normal9 Participants
Istaroxime 0.5 µg/kg/MinTotal Bilirubin - ShiftAbnormal to Normal9 Participants
Istaroxime 0.5 µg/kg/MinTotal Bilirubin - ShiftMissing5 Participants
Placebo Cohort ITotal Bilirubin - ShiftAbnormal to Normal3 Participants
Placebo Cohort ITotal Bilirubin - ShiftAbnormal to Abnormal11 Participants
Placebo Cohort ITotal Bilirubin - ShiftMissing4 Participants
Placebo Cohort ITotal Bilirubin - ShiftNormal to Abnormal2 Participants
Placebo Cohort ITotal Bilirubin - ShiftNormal to Normal21 Participants
Istaroxime 1.0 µg/kg/MinTotal Bilirubin - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinTotal Bilirubin - ShiftNormal to Normal13 Participants
Istaroxime 1.0 µg/kg/MinTotal Bilirubin - ShiftNormal to Abnormal2 Participants
Istaroxime 1.0 µg/kg/MinTotal Bilirubin - ShiftAbnormal to Normal6 Participants
Istaroxime 1.0 µg/kg/MinTotal Bilirubin - ShiftAbnormal to Abnormal15 Participants
Other Pre-specified

White Blood Cells (WBC) - Shift

Safety endpoint: Baseline normal/abnormal to Day 3 normal/abnormal in WBC

Time frame: Day 3

Population: Safety Population

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Istaroxime 0.5 µg/kg/MinWhite Blood Cells (WBC) - ShiftNormal to Abnormal2 Participants
Istaroxime 0.5 µg/kg/MinWhite Blood Cells (WBC) - ShiftAbnormal to Abnormal0 Participants
Istaroxime 0.5 µg/kg/MinWhite Blood Cells (WBC) - ShiftNormal to Normal35 Participants
Istaroxime 0.5 µg/kg/MinWhite Blood Cells (WBC) - ShiftAbnormal to Normal0 Participants
Istaroxime 0.5 µg/kg/MinWhite Blood Cells (WBC) - ShiftMissing2 Participants
Placebo Cohort IWhite Blood Cells (WBC) - ShiftAbnormal to Normal1 Participants
Placebo Cohort IWhite Blood Cells (WBC) - ShiftAbnormal to Abnormal2 Participants
Placebo Cohort IWhite Blood Cells (WBC) - ShiftMissing2 Participants
Placebo Cohort IWhite Blood Cells (WBC) - ShiftNormal to Abnormal6 Participants
Placebo Cohort IWhite Blood Cells (WBC) - ShiftNormal to Normal30 Participants
Istaroxime 1.0 µg/kg/MinWhite Blood Cells (WBC) - ShiftNormal to Abnormal6 Participants
Istaroxime 1.0 µg/kg/MinWhite Blood Cells (WBC) - ShiftNormal to Normal25 Participants
Istaroxime 1.0 µg/kg/MinWhite Blood Cells (WBC) - ShiftMissing4 Participants
Istaroxime 1.0 µg/kg/MinWhite Blood Cells (WBC) - ShiftAbnormal to Normal2 Participants
Istaroxime 1.0 µg/kg/MinWhite Blood Cells (WBC) - ShiftAbnormal to Abnormal3 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026