false
OasisLMS
Catalog
HRS Board Review 2025 New Courses (Reviewers Copy)
Workshop 1_Tomaselli_2025_case 3 answer
Workshop 1_Tomaselli_2025_case 3 answer
[Please upgrade your browser to play this video content]
Video Transcription
Video Summary
The video discusses digitalis-induced delayed after depolarizations in a patient with dilated cardiomyopathy who experienced ICD shocks for tachycardia. Her ECG showed PACs and nonspecific STT wave changes, and a rhythm strip revealed bidirectional ventricular tachycardia, a digitalis-associated arrhythmia. Digitalis inhibits sodium-potassium ATPase, altering sodium-calcium exchange and potentially leading to calcium overload and triggered arrhythmias. Though digitalis has a therapeutic parasympathomimetic effect, high concentrations can cause intracellular calcium overload and sympathetic activation, resulting in delayed depolarizations and arrhythmias.
Keywords
digitalis
arrhythmia
cardiomyopathy
ventricular tachycardia
calcium overload
×
Please select your language
1
English