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Contribution of respiratory muscle strength and right ventricular pump function to exercise intolerance in patients with precapillary pulmonary hypertension

Contribution of respiratory muscle strength and right ventricular pump function to exercise intolerance in patients with precapillary pulmonary hypertension

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
DRKS
Registry ID
DRKS00014695
Enrollment
80
Registered
2018-05-14
Start date
2018-06-01
Completion date
Unknown
Last updated
2025-04-07

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

Conditions

I27.0 I27.20

Interventions

Group 1: 40 Patients with precapillary PH will undergo the following examinations. This will be done at daytime. First of all a current cardiac MRI scan will be obtained. Secondly all current symptom
with no abnormal findings in an electrocardiogram, echocardiogram and normal NT-BNP levels) will also undergo lung function tests and a diaphragm ultrasound examination.

Sponsors

Institut für Schlafmedizin und neuromuskuläre Erkrankungen Universitätsklinikum Münster
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Inclusion criteria

Inclusion criteria: a. Age > 18 years (no age limit) b. able to consent c. Diagnosis of Nizza class I or IV precapillary pumonary Hypertension according to the most recent Guidelines of the European Society of Cardiology (ESC); >12 weeks since the diagnosis of PH has been made; no hospitalisation for HF in the last 4 weeks; optimal medical therapy in accordance with the most recent Guidelines of the European Society of Cardiology (ESC) with no change in medication in the last 4 weeks and combination therapy for PAH -where there was no treatment with combination therapy in PAH patients then the reason must be documented

Exclusion criteria

Exclusion criteria: - secondary (postcapillary) pulmonary hypertension (mean pulmonary arterial hypertension > 25 mmHg; PCWP >15 mmHg) - other severe internistic pre-existing conditions, especially insulin-dependent diabetes or severe renal impairment - severe neurological pre-existing conditions such as stroke, especially brainstem infarction - intake of opioids - severe psychiatric pre-existing conditions - contraindications to (cardiac) magnetic resonance imaging (MRI)

Design outcomes

Primary

MeasureTime frame
Thickening Ratio on diaphragm ultrasound (n.U.)

Secondary

MeasureTime frame
Fatigue Severity Scale [points] 6 MWD [m], Medical Research Council Dyspnoea Scale [points], Borg Dyspnoea Scale, Minessota Living with Heart Failure Questionnaire [Points] -> the above mentioned parameters will be assessed using questionnaires Forced vital capacity [ml], FEV1/FVC [%] -> the above mentioned Parameters will be assessed using Standard lung function testing Rate of rise of diaphragmatic amplitude during tidal breathing on ultrasound [cm/sec], Rate of rise of diaphragmatic amplitude during Sniff maneuver on ultrasound, Rate of rise of diaphragmatic amplitude during maximal inspiration on ultrasound, diaphragm thickness after maximal inspiration on ultrasound [cm], diaphragm thickness after maximal exspiration on ultrasound, diaphragm thickness after tidal breathing on ultrasound [cm] -> the above mentioned Parameters will be assessed using diaphragm ultrasound right ventricular pumpfunction on a cardiac MRI scan [%] pO2 and pCO2 on capillary blood gas analysis [mmHG]

Countries

Germany

Contacts

Public ContactJens Spiesshoefer

Institut für Schlafmedizin und neuromuskuläre Erkrankungen Universitätsklinikum Münster

jens.spiesshoefer@ukmuenster.de00492518341119

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026