Background: Right ventricular failure is the most common post-operative complication after L-VAD implant and it represents an important cause of mortality in these patients. Pre-existing right ventricular disfunction is considered an absolute contraindication to L-VAD implant, though in some cases right ventricular hypokinesia could be the expression of elevated pressure in the pulmonary circulation secondary to high left heart filling pressures. Numerous clinical, echocardiographic and hemodynamic parameters have been proposed for the evaluation of L-VAD eligibility. Among these Michigan right ventricle failure score, rest and dobutamine stress echocardiography (TAPSE, S wave peak, right wall longitudinal strain) and right heart catheterization parameters showed an adequate correlation with L-VAD implant outcome.
Case report: A 67 yo patient affected by advanced heart failure secondary to ischemic dilatative cardiomyopathy was referred to our unit for frequent exacerbations of heart failure despite optimal medical therapy. Echocardiography detected severe left ventricle disfunction, severe mitral regurgitation and a hypokinetic right ventricle that was not present at a previous evaluation showing only a mild disfunction. We therefore performed a dobutamine stress echocardiography to assess right ventricular contractile reserve, which demonstrated an adequate systolic response at hight dose of dobutamine (20 y/Kg/min). These data were confirmed by right heart catheterization, which allowed the evaluation of hemodynamic predictors of post L-VAD RV failure. After Heart Team discussion the L-VAD was successfully implanted. The patient was extubated at day 1 PO and weaned from inotropes at day 4, he did not present any clinical and hemodynamic signs of RV failure and is currently undergoing post-surgical rehabilitative care.
Conclusions: Our experience strengthen the importance of a standardized multiparametric assessment in patients affected by advanced heart failure proposed for L-VAD and showing right ventricle contractile impairment.
