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Updated: Sep 29, 2026

Assessment of Sarcoplasmic Reticulum Calcium Reserve and Intracellular Diastolic Calcium Removal in Isolated Ventricular Cardiomyocytes
Published on: September 18, 2017
Effect of amiodarone on functional state of sarcoplasmic reticulum in rat myocardium
S A Afanas'ev1, I A Lukavskaya, M L Kandinskii
1Research Institute of Cardiology, Tomsk Research Center, Siberian Division of the Russian Academy of Medical Sciences, Tomsk.
Abstract:
Function of sarcoplasmic reticulum was studied in rat papillary muscles treated with amiodarone. An extra stimulus (0.5 Hz) was delivered to the muscle 0.225 sec after application of a regular stimulus. Postextrasystolic potentiation was evaluated in control myocardial samples and samples treated with amiodarone. The preparation significantly increased all the parameters of postextrasystolic contraction. It was concluded that amiodarone potentiates the ability of sarcoplasmic reticulum to accumulate Ca2+ ions.

