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HRS Board Review 2025 New Courses (Reviewers Copy)
Workshop 1_Tomaselli_2025_case 7
Workshop 1_Tomaselli_2025_case 7
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Video Transcription
Video Summary
A 51-year-old woman with a history of hypertension and substance use disorder presents with syncope. Her medications include hydrochlorothiazide, nifedipine, and methadone. Labs show low potassium (3.3 mEq/L) and normal magnesium levels. An echocardiogram reveals left ventricular hypertrophy and normal ejection fraction. After admission, an ECG is taken. The potential causes for her arrhythmia are evaluated: ischemia from cocaine use, decreased repolarization due to ventricular hypertrophy, hypokalemia from hydrochlorothiazide, drug-induced QT prolongation, or hypokalemia with a genetic mutation.
Keywords
syncope
hypokalemia
ventricular hypertrophy
arrhythmia
QT prolongation
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