Figure 2.
Effect of amiodarone (AM) on IKAS in atrial myocytes from patients with normal sinus rhythm (NSR) and chronic atrial fibrillation (CAF). (A, C) Top: representative current traces recording at baseline and in the presence of AM or AM with apamin in NSR (A) and CAF (C). Bottom: current-voltage (I–V) relation curves of AM-sensitive IKAS (n=12) and AM+apamin-sensitive IKAS (n=9). (B, D) Top: representative current traces recording at baseline and in the presence of apamin or apamin with AM in NSR (B) and CAF (D). Bottom: current-voltage (I–V) relation curves of apamin-sensitive IKAS (n=8) and apamin+AM-sensitive IKAS (n=10). (E) Current-voltage relation curves of IKAS inhibition by AM in NSR (n=8) and CAF (9). * P<0.05, ** P<0.01 versus NSR.