Prospective WCD Post CABG Registry (CABG Registry)

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.