# The Role of Ventricular Assist Devices in Patients with Ischemic vs. Non-Ischemic Cardiomyopathy

## TL;DR

This study compares outcomes of a heart pump implant in patients with two types of heart failure, finding that pre-surgery blood pressure and kidney health predict survival.

## Contribution

The study identifies specific preoperative predictors of early mortality and hemodynamic instability in patients receiving the HM3 LVAD.

## Key findings

- Elevated right-sided pressures and renal dysfunction predict early mortality after HM3 LVAD implantation.
- Patients with ischemic cardiomyopathy show greater early left ventricular recovery compared to those with dilated cardiomyopathy.
- Higher pre-implant pulmonary artery pressure is linked to the need for vasopressor support post-surgery.

## Abstract

Background: The HeartMate 3 (HM3) left ventricular assist device (LVAD) has demonstrated improved clinical outcomes in patients with advanced heart failure (HF). However, the influence of underlying HF etiology—ischemic cardiomyopathy (ICM) versus dilated cardiomyopathy (DCM)—on post-implantation outcomes remains insufficiently characterized. Objectives: This paper aims to evaluate early postoperative outcomes following HM3 LVAD implantation in patients with ICM versus DCM and to identify the preoperative hemodynamic and clinical predictors of early mortality and hemodynamic instability. Methods: We conducted a retrospective single-center cohort study of 30 patients who underwent HM3 LVAD implantation between 2017 and 2024. Patients were stratified by HF etiology (ICM, n = 17; DCM, n = 13), and preoperative clinical, echocardiographic, and right heart catheterization data were analyzed. The primary endpoint was 30-day postoperative survival. Secondary endpoints included postoperative hemodynamic stability and the need for vasopressor support. Results: Non-survivors (n = 13) demonstrated elevated central venous pressure (>16.5 mmHg), mean right ventricular pressure (>31.5 mmHg), and pulmonary vascular resistance (>7.5 Wood units), in addition to higher preoperative creatinine levels and longer cardiopulmonary bypass times. Vasopressor requirement postoperatively was associated with elevated pre-implant systolic pulmonary artery pressure. Conclusions: Preoperative right-sided pressures and renal dysfunction are strong predictors of early mortality following HM3 LVAD implantation. Patients with ICM exhibit greater early left ventricular recovery compared to those with DCM. These findings underscore the importance of comprehensive and personalized preoperative risk stratification—particularly in patients with DCM and pulmonary hypertension—to optimize postoperative outcomes and guide patient selection for durable LVAD support.