Add time:08/26/2019         Source:sciencedirect.com

In guinea pig ventricular cardiomyocytes, the R(−)-enantiomer of efonidipine concentration-dependently blocked T-type Ca2+ current with 85% inhibition at 1 μM. In contrast, R(−)-efonidipine (1 μM) had no effect on the L-type Ca2+ current and Ca2+ transient in cardiomyocytes and contractile force in papillary muscles. Thus, R(−)-efonidipine is a highly selective blocker of the T-type Ca2+ current in native myocardia.

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