February 17, 2004Circulation Research
Contribution of I Kr to Rate-Dependent Action Potential Dynamics in Canine Endocardium
Why the study?
Does modifying I(Kr) affect action potential duration alternans in canine endocardial myocytes?
Population
Isolated canine endocardial myocytes
Comparison
E-4031 (I inhibitor) and computer modeling of I vs Baseline/control conditions without E-4031
Design
Preclinical
Authors
Discussion
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Member takes
Implication
I(Kr) modulation may influence APD alternans; hypothesis-generating in canine models and requires human validation before clinical consideration.
Structured PICO
Does modifying I(Kr) affect action potential duration alternans in canine endocardial myocytes?
P
Population
Isolated canine endocardial myocytes
I
Intervention
E-4031 (I(Kr) inhibitor) and computer modeling of I(Kr)
C
Comparator
Baseline/control conditions without E-4031
O
Outcome
Action potential duration (APD) alternans and I(Kr) current characteristics at different cycle lengthssurrogate
I(Kr) contributes importantly to rate-related alterations of repolarization, suggesting that modifying I(Kr) may be a promising approach to suppressing APD alternans and preventing ventricular tachyarrhythmias.
Cite This Study
Hua et al. (2004) studied this question.