Prospective WCD Post CABG Registry (CABG Registry)

The primary objective of this study is to determine the rate of recovery of ventricular function (EF>35%) in patients with ischemic heart failure with reduced ejection fraction (EF ≤35%) after undergoing first time, coronary artery bypass grafting (CABG) procedure while being treated with guideline-directed medical therapy (GDMT). It is anticipated that more patients will have EF recovery as compared to a retrospective register where 54% of isolated CABG patients had EF recovery by end of WCD use (Kuehn et al., 2022), mostly driven by the modern improved usage of GDMT drugs.

This study is designed as a multi-center prospective observational study of patients who underwent first time coronary artery bypass grafting procedure with HFrEF at hospital discharge to test the hypothesis that EF recovery will be improved by end of WCD wear due to increased usage of GDMT. The study will target 20% female enrollment and recruitment will be adjusted if the percentage of female subjects enrolled are far from 20%.

Inclusion criteria

• Patient underwent first-time CABG surgery <10 days before enrollment.
• Patient is prescribed WCD for a primary reason of HF with reduced EF < 35% measured after surgery but before hospital discharge.
• Patient is ≥18 years old

Exclusion criteria

• Patients having combination CABG surgery with heart valve repair.
• Patients with prior CABG.
• Patients who have an active unipolar pacemaker.
• Patients with a physical or mental condition that could impair their ability to properly interact with the WCD.

Patients currently participating in an interventional clinical study. Patients with any skin condition that would prevent wearing the device. Patients with an advanced directive prohibiting resuscitation.