What is a recommended condition for using a wearable cardioverter defibrillator (WCD)?

The use of a wearable cardioverter defibrillator (WCD) is particularly indicated for patients who have specific risk factors for sudden cardiac arrest, especially those with a history of such an event. In this context, patients who have experienced sudden cardiac arrest and require the removal of an implanted cardioverter-defibrillator (ICD) are at an increased risk for life-threatening arrhythmias. The WCD serves as a temporary measure to monitor heart rhythm and provide defibrillation if needed until a more permanent solution can be established.

This use is especially critical in the post-cardiac arrest setting, as these patients may not yet be eligible for an enduring ICD implant, or they may be experiencing complications that necessitate the temporary removal of their ICD. The WCD can offer vital protection during this vulnerable period, bridging the gap until the patient can receive definitive treatment, such as re-implantation of an ICD.

Using a WCD is not recommended for all patients with heart failure, as that population is broad and diverse. Not every heart failure patient is at equal risk for sudden cardiac arrest or requires such monitoring. Similarly, providing the WCD for patients after myocardial infarction without symptoms may not be necessary, as they might have a sufficiently low risk