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CAPITAL OFFLOAD-SHOCK

Optimal Timing of Renal Replacement Therapy in Hypervolemic Cardiogenic Shock

Status
Not yet recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07756801
Acronym
OFFLOAD-SHOCK
Enrollment
456
Registered
2026-08-11
Start date
2026-09-01
Completion date
2031-09-01
Last updated
2026-08-11

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

Conditions

Cardiogenic Shock, Hypervolemia, Renal Replacement Therapy

Brief summary

CAPITAL OFFLOAD-SHOCK will aim to answer if early use of renal replacement therapy, like dialysis, in patients with reduced body fluids causing the heart to be unable to pump enough blood through the body reduces in-hospital death when compared to the current standard of care. The current standard of care is to wait until renal replacement therapy is clinically necessary.

Detailed description

The trial will evaluate the in-hospital mortality between starting renal replacement therapy (RRT) immediately upon confirmation of eligibility and consent and using standard medical therapy without RRT unless one of the following occurs: 1. clinical volume overload refractory to diuresis with high-dose intravenous furosemide plus either thiazide-like diuretic and/or acetazolamide, resulting in pulmonary edema, necessitation ventilation with F1O2 \> 50% 2. hyperkalemia with serum potassium \>6mmol/L 3. Severe metabolic acidosis with pH \<7.2 and bicarb \<12 mmol/L thought to be due to renal insufficiency.

Interventions

DRUGImmediate renal replacement therapy

Renal replacement therapy started within 6 hours of randomization

Sponsors

Ottawa Heart Institute Research Corporation
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Multi-center, open-label, randomized controlled trial.

Eligibility

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

Inclusion criteria

* adult patients \>/= 18 years of age admitted to an intensive care unit * Diagnosed clinically with Society for Cardiovascular Angiography and Interventions (SCAI) Class C or D cardiogenic shock * Clinical or hemodynamic evidence of volume overload

Exclusion criteria

* Patients whose care plan, as determined by the treating clinical team, will not include renal replacement therapy * Decision has already been made by the treating clinical team to initiate renal replacement therapy * Hyperkalemia with serum potassium \>/= 6mmol/L at the time of screening * Severe metabolic acidosis with serum bicarbonate \</= 12 mmol/L at the time of screening * Severe azotemia with serum urea \>/= 40 mmol/L at the time of screening * Acute intoxication necessitating use of renal replacement therapy * Recent renal replacement therapy (within 30 days) * Known end-stage renal disease (defined as an estimated glomerular filtration rate \<15 ml/min/1.73m2 * presentation with out-of-hospital cardiac arrest

Design outcomes

Primary

MeasureTime frameDescription
All cause mortalityBaseline to 90 daysOccurrences of death from any cause
Increased Serum LactateRandomization to 24 hours post randomization.Serum lactate greater than 3.5mmol/L between 6 and 24hours after randomization
Mechanical Circulatory SupportBaseline to Hospital Discharge - expected up to 90 daysNew need for, or replacement of, a mechanical circulatory support device.
Resuscitated cardiac arrestBaseline to Hospital Discharge - expected up to 90 daysOccurrences of resuscitated cardiac arrest

Secondary

MeasureTime frameDescription
Continued renal replacement therapyBaseline to Hospital Discharge - expected up to 90 daysRenal replacement therapy dependence for participants at discharge from index hospitalization
Length of hospital stayBaseline to Hospital Discharge - expected up to 90 daysNumber of days spent in hospital
Length of intensive care unit stayBaseline to Hospital Discharge - expected up to 90 daysThe number of days spent in the intensive care unit during index hospitalization
Major bleeding eventsBaseline to Hospital Discharge - expected up to 90 daysBleeding events defined as the Bleeding Academic Research Consortium (BARC) type 3 or higher)
All-cause mortalityBaseline to Hospital Discharge - expected up to 90 daysOccurrences of death due to any cause
Ventilator free daysBaseline to 90 daysNumber of ventilation free days
Re-hospitalizationBaseline to 90 daysRe-admission to hospital for any reason.
Renal Replacement Therapy dependenceBaseline to 90 daysRenal replacement therapy dependence among participants to end of follow up.
Days out of hospitalBaseline to 90 daysThe median number of days spent out of hospital
Quality of Life EvaluationBaseline to 90 daysMedian scores of the EuroQoL 5D (dimensions). Higher scores indicate better perceived health.

Countries

Canada

Contacts

CONTACTHannah Feagan, RN
hfeagan@ottawaheart.ca613-696-7000
PRINCIPAL_INVESTIGATORSimon Parlow, MD, FRCPC

Ottawa Heart Institute Research Corporation

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 12, 2026