(FIT)-Module 1, Workshop 1: Electrocardiographic/Electrophysiologic Correlation-Tomaselli Case 3 Question

Video Transcription

Video Summary

A 64-year-old woman with dilated cardiomyopathy and a left ventricular ejection fraction of 25% presents after experiencing two defibrillator shocks. She is on lisinopril, metoprolol, digitalis, and furosemide. Her complaints include malaise, dizziness, and shortness of breath. An ICD interrogation shows multiple tachycardia episodes, two of which resulted in shocks. Electrolytes are normal, with a BUN of 35 mg/dL and creatinine at 1.9 mg/dL. The case discusses potential causes of tachycardia, including digitalis-induced delayed after depolarizations, exaggerated repolarization dispersion, inappropriate atrial fibrillation shocks, and tachycardia-induced tachycardia.

Keywords

dilated cardiomyopathy

implantable cardioverter-defibrillator (ICD) shocks

digitalis toxicity

tachycardia causes

heart failure management