Tiny trial tests which defibrillator is best for heart muscle disease

This pilot study enrolled 5 people with hypertrophic cardiomyopathy who needed an implantable cardioverter defibrillator (ICD) but did not require pacing. Participants were randomly assigned to receive either a subcutaneous ICD (placed under the skin) or a transvenous ICD (with leads in the veins). The main goals were to see how many people could be recruited per month and to track inappropriate shocks and device complications over 12 months. This small study is a first step toward planning a larger trial.