HRS Board Review 2025 New Courses (Reviewers Copy)-Workshop 1_Tomaselli_2025

Video Transcription

Video Summary

A 64-year-old woman with dilated cardiomyopathy and a dual-chamber ICD experiences two defibrillator shocks and presents with malaise, dizziness, and shortness of breath. Her ICD reveals episodes of tachycardia, with two events leading to shocks. Electrolytes are normal, BUN is 35 mg/dL, and creatinine is 1.9 mg/dL. Potential causes for her tachycardia include digitalis-induced delayed after depolarizations, exaggerated dispersion of repolarization, inappropriate shocks from rapid atrial fibrillation, or tachycardia-induced tachycardia. The figures provided, including baseline ECG and monitor strips, are consulted for diagnosis.

Keywords

dilated cardiomyopathy

dual-chamber ICD

tachycardia

defibrillator shocks

digitalis-induced depolarizations