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Family Pedigree
The patient's maternal grandmother had HCM and third-degree heart block requiring pacemaker implantation. Her mother was diagnosed with HCM and WPW syndrome. Her sister had HCM with WPW syndrome and an ICD. No male relatives were affected. The black arrow indicates the patient. HCM = hypertrophic cardiomyopathy; ICD = implantable cardioverter-defibrillator; WPW = Wolff-Parkinson-White.
