Stress-Echography in Hereditary Haemorrhagic Telangiectasia Patient With Hepatic Involvement

Study Overview
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Brief Summary
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The hepatic involvement of HHT (Hereditary Haemorrhagic Telangiectasia) disease is characterised by the formation of arterio-sus-hepatic shunts which lead to dilatation of the hepatic artery and may result in high output heart failure. This evolves silently for long-standing period from left ventricular cavities dilatation to advanced heart failure with post-capillary pulmonary hypertension (PH) (more rarely pre-capillary), and its evolution is poorly understood. The specific treatment options for HHT disease are either the use of anti-angiogenic therapy (bevacizumab) or liver transplantation. As rest echocardiography can only detect advanced cases or heart failure with rest PH, the investigators speculate that exercise echocardiography can provide additional information in patients without rest PH. The hypothesis is that an exaggerated pulmonary pressure increase during exercise may precede the occurrence of rest PH in the course of the disease. It could identify patients with substantial heart failure at an earlier stage and may facilitate the access to liver transplantation. These parameters have never been studied in this context and it seems interesting to evaluate them in this pilot study. The investigators hypothesise that HHT (Hereditary Haemorrhagic Telangiectasia) patients with hepatic involvement and cardiac high output will have significantly greater and/or earlier elevation of exercise pulmonary arterial pressures than those with normal cardiac output.

Official Title
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Evaluation of the Value of Measuring Pulmonary Arterial Pressures During Exercise in Hereditary Haemorrhagic Telangiectasia Patients With Hepatic Involvement - Pilot Study

Conditions
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Hereditary Hemorrhagic Telangiectasia, Rendu Osler Disease

Intervention / Treatment
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* Other: Stress echocardiography


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: HHT patient > 18 yo Hepatic involvement (hepatic artery diameter > 6mm) Patient having received the information and signed the informed consent form Patient affiliated to a social security scheme or beneficiaries of a similar scheme Exclusion Criteria: Haemoglobin < 90 g/L Active Infection Atrial Fibrillation permanent or persistent Known cardiopathy Pregnant or breastfeeding woman (by questioning) Adult subject to a legal protection measure (guardianship) Participation in another clinical trial that may interfere with the proposed trial (investigator judgment) Patient physically unable to pedal Patient with Pulmonary arteriovenous malformations awaiting embolization Patient treated with beta-blockers Secondary Exclusion Criteria verified on rest ultrasound PAH (Pulmonary Arterial Hypertension) at rest (Vmax > 2.8 m/sec) Inability to obtain a stream of IT at rest Patient with atrial fibrillation (AF)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: HHT patients with hepatic involvement and high cardiac index<br>HHT patients with a dilated (diameter > 6mm) or tortuous hepatic artery and an elevated cardiac index (> 3.5 l/mn/m²) | Other: Stress echocardiography<br>* After a rest trans thoracic echocardiography (usual follow-up), eligible patients will have a stress ultrasound echocardiography on a dedicated cycle ergometer<br>|
| Other: HHT patients with hepatic involvement and normal cardiac index<br>HHT patients with a dilated or tortuous hepatic artery and a normal cardiac index | Other: Stress echocardiography<br>* After a rest trans thoracic echocardiography (usual follow-up), eligible patients will have a stress ultrasound echocardiography on a dedicated cycle ergometer<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Comparison of exercise pulmonary artery systolic pressure in patients with HHT and liver involvement. | The systolic pulmonary artery pressure (PAPS) during exercise will be compared between the two groups of patients. PAPS will be estimated by the maximum velocity (Vmax) of tricuspid insufficiency flow at peak exercise on cardiac ultrasound. | Day 1 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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HHT, Stress echography, Pulmonary arterial pressures