Key result
In experimental models, flecainide reduces spontaneous sarcoplasmic reticulum Ca2+ release primarily via INa blockade rather than direct effects on the RyR2 receptor.
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This reply clarifies the debate on flecainide's mechanism in CPVT, emphasizing that INa blockade and direct RyR2 stabilization are likely complementary mechanisms in reducing pro-arrhythmic SR Ca2+ leak.
Sikkel et al. (2013) conducted a letter in Catecholaminergic polymorphic ventricular tachycardia. Flecainide was evaluated on Spontaneous sarcoplasmic reticulum (SR) Ca2+ release. In experimental models, flecainide reduces spontaneous sarcoplasmic reticulum Ca2+ release primarily via INa blockade rather than direct effects on the RyR2 receptor.
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