Pressure Assessment to Improve Outcomes After TAVR: a Registry

Our research has disclosed that patients who have abnormal invasive cardiac hemodynamics (narrow aortic to ventricular end-diastolic pressure difference, indexed to heart rate) after TAVR suffer from poor long-term survival. This hemodynamic value can be referred to as the aortoventricular index (AVi). In a single center observational study, the 2-year mortality rate for patient with a value ≥0.6 mm Hg/bpm was 25% compared with 36% for patients with a value \<0.6 mm Hg/bpm. An abnormal AVi was an independent predictor for poor survival. Hypertension and diastolic dysfunction are 2 highly co-morbid conditions among these patients. Currently, there is lack of appreciation that pressure measurements obtained at the time of TAVR can provide long-term prognostic value. There is also a lack of understanding on how to improve outcomes and quality of life among such patients. Eplerenone is a selective aldosterone receptor antagonist approved for use for treatment of hypertension. Animal studies have shown that aldosterone receptor antagonists can decrease interstitial myocardial fibrosis. The non-selective aldosterone receptor antagonist, spironolactone 25 mg daily compared with placebo was shown to improve diastolic function, as assessed by echocardiography, among 28 elderly subjects. A meta-analysis of eleven studies in 942 subjects found that aldosterone receptor antagonists improve diastolic function and markers of cardiac fibrosis without significant changes to left ventricular mass or dimensions. In a randomized controlled trial, eplerenone was found to be safely tolerated among asymptomatic patients with moderate to severe aortic stenosis.