Figure 1.

Long-Term Appropriate ICD Therapy in HCM

Long-term appropriate ICD therapy in HCM. (Top) The 48 appropriate ICD therapies in 15 high-risk HCM patients who were followed postimplant for an average of 20 years (up to 31 years).

ICD events are plotted with respect to delay following implant. Initial (I) therapies are shown in blue and subsequent therapies (S) in red. (Bottom) Showing for each patient initial (n = 15) and subsequent (n = 33) interventions and dormancy periods without therapies. ∗5 interventions in 1 year; †4 interventions in 1 year. HCM = hypertrophic cardiomyopathy; ICD = implantable cardioverter-defibrillator.