Circadian Rhythm of Appropriate Implantable Cardioverter Defibrillator Discharges in Patients with Hypertrophic Cardiomyopathy

Abstract

Analysis of the temporal distribution of ICD discharges in HCM patients without previous surgical myectomy or percutaneous alcohol septal ablation reveals a peak occurrence of ICD discharges during the period from 12:00 to 18:00 hours with the highest incidence between 14:00 and 16:00 hours. This is different from the well-documented early morning peak observed in ischemic dilated cardiomyopathy patients.