Right Ventricular Pulmonary Vascular Interaction in Pulmonary Hypertension

University of Wisconsin (UW)

Status: Completed

Conditions: Pulmonary Arterial Hypertension (PAH)

Treatments: Device: Magnetic Resonance Imaging (MRI) with exercise

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT03523910

2015-1526

1R01HL105598-01A1 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

The goals of this study were two-fold. First, the attempt to quantify the relationships between pulmonary arterial stiffness, right ventricular function and the efficiency of ventricular-vascular interactions in patients with pulmonary arterial hypertension (PAH). Second, the attempt to quantify the effects of exercise on pulmonary arterial stiffness, pulmonary vascular resistance, right ventricular function and the efficiency of ventricular-vascular interactions in patients with PAH.

Full description

The goals of this study are to quantify right ventricular-pulmonary vascular interactions in different types of PAH, to determine the temporal changes in these interactions with PAH progression and to quantify the effects of exercise on right ventricular function. The inclusion of the subpopulation of PAH patients with systemic sclerosis (SSc) was a result of the anticipation that this group has worse arterial stiffening than other groups, and consequently more inefficient right ventricular-pulmonary vascular interactions, which account for their worse prognosis.

Enrollment: 14 patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Diagnosis of pulmonary arterial hypertension or a subtype
2. Referred for right heart catheterization
3. Age between 18 and 80 years
4. New York Heart Association (NYHA) functional class I, II, or III

Exclusion criteria

1. Recent syncope (within 1 year)

2. Severe skeletal or muscle abnormalities prohibiting exercise

3. Mixed etiology pulmonary arterial hypertension

4. Severe lung disease

   1. Test results indicating severe obstruction
   2. Total lung capacity < 60%

5. Pregnancy or breastfeeding

6. NYHA class IV patient

7. Contraindications to magnetic resonance imaging

8. Kidney dysfunction as determined by an estimated glomerular filtration rate (eGFR) of < 30 mL/min/1.73m2

9. Contraindication to gadolinium

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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14 participants in 1 patient group

Patient

Experimental group

Description:

A research MRI scan with exercise will be obtained in conjunction with standard of care cardiopulmonary testing.

Treatment:

Device: Magnetic Resonance Imaging (MRI) with exercise