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

Video Transcription

Question 12. Activation maps recorded from normal and failing myocardium are shown in this figure.  The changes in conduction are most likely the result of which of the following? Downregulation of delayed rectifier potassium current and action potential prolongation,  downregulation of beta-adrenergic receptors, downregulation of connexin 43, or downregulation of sodium-calcium exchange. Let me give you a few seconds to consider this.

Video Summary

Question 12. Activation maps recorded from normal and failing myocardium are shown in this figure. The changes in conduction are most likely the result of which of the following? Downregulation of delayed rectifier potassium current and action potential prolongation, downregulation of beta-adrenergic receptors, downregulation of connexin 43, or downregulation of sodium-calcium exchange. Let me give you a few seconds to consider this.

Keywords

myocardium

conduction

connexin 43

action potential

beta-adrenergic receptors