TRI-FR : Multicentric Randomized Evaluation of Tricuspid Valve Percutaneous Repair System (Clip for the Tricuspid Valve) in the Treatment of Severe Secondary Tricuspid Disorders

Detailed Summary

Tricuspid regurgitation (TR) is a long-overdue valvular pathology. Its prevalence is significant and increasing with the aging of the population. It is often a consequence of chronic left cardiac pathologies or atrial fibrillation. Surgical treatment is recommended in severe symptomatic TR or when the tricuspid annulus is dilated with TR identified prior to scheduled left heart valve surgery. TR are mainly secondary (complicating left heart disease, pulmonary hypertension, atrial fibrillation and atrial dilatation) and pose a difficult problem related to the prognosis. The risk of death or hospitalization is high under medical treatment. Nevertheless, the surgical results are disappointing with significant morbidity and mortality, which are increased by associated comorbidities that are frequent in these sorts of patients. The benefit-risk assessment of surgery is limited by multiple confounders. This justifies the evaluation of alternative methods aimed at correcting TR with less interventional risk. The Clip for the tricuspid valve has been evaluated in the TRILUMINATE trial (inclusion of 85 patients with moderate-to-severe symptomatic TR with a 6-month follow-up). The Triclip system appears to be safe and effective at reducing tricuspid regurgitation by at least one grade. This reduction could translate to significant clinical improvement at 6 months post-procedure. It justified the European Conformity (CE) mark obtention. A very similar system for the mitral valve (Mitraclip) was previously tested in the randomized EVEREST II study against conventional surgery. The results of the EVEREST II trial justified the recourse to percutaneous edge-to edge mitral repair in patients with primary mitral regurgitation when the patient is contraindicated to conventional surgery. The Mitra-FR study made it possible to study the role of Mitraclip for treating patient suffering from a secondary mitral insufficiency. It leads to the implementation of this technique in selected patients. For secondary TR, several series underscored its prevalence and its clinical consequences. TR treatment justifies the proposal for a randomized study. As a matter of fact, evidence for treating are seriously lacking. Surgical surveys report hospital mortality \~ 8.8%. It, therefore, seems necessary to conduct a study as robust as possible to evaluate the contribution of clip for the tricuspid valve (as an innovative percutaneous technique) compared to conventional pharmacological treatment in patients who are unsuitable for a surgical isolated correction of the TR and who has suitable anatomy for clip for the tricuspid valve. It will be necessary to demonstrate clinical, functional (quality of life), echocardiographic and biological benefit of the percutaneous treatment vs optimized medical treatment alone.

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