Multiple modulations of action potential duration by different calcium channel blocking agents in guinea pig ventricular myocytes

S Zhang, T Sawanobori, Y Hirano… - Journal of …, 1997 - journals.lww.com
Abstract Effects of extracellular applications of different types of Ca 2+ channel blocking
agents (Mn 2+, verapamil, and nisoldipine) on action-potential duration and membrane …

Kinetics and state-dependent effects of verapamil on cardiac L-type calcium channels

H Nawrath, JW Wegener - Naunyn-Schmiedeberg's archives of …, 1996 - Springer
The voltage dependence and the kinetics of block by verapamil of L-type calcium current (I
Ca) were investigated in ventricular myocytes from rat hearts using the whole-cell patch …

Effects of PDE inhibitors and carbachol on the L-type Ca current in guinea pig ventricular myocytes

K Mubagwa, T Shirayama, M Moreau… - American Journal of …, 1993 - journals.physiology.org
The phosphodiesterase inhibitors 3-isobutyl-1-methylxanthine (IBMX; 100 microM) and
papaverine (100 microM) increased peak L-type Ca current (ICa) more than fivefold in a way …

Butanedione Monoxime Promotes Voltage-dependent Inactivation ofL-Type Calcium Channels in Heart. Effects on Gating Currents

G Ferreira, P Artigas, GPG Brum - Journal of molecular and cellular …, 1997 - Elsevier
The effect of 20 mmextracellularly applied 2, 3-Butanedione monoxime (BDM) onl-type
Ca2+ channel charge movement current was studied in whole-cell voltage-clamped guinea …

Effects of K+ channel modulators on the relationship between action potential duration and Ca2+ transients in single ventricular myocytes of the guinea pig

T Tokuno, K Muraki, M Watanabe… - The Japanese Journal of …, 1999 - jstage.jst.go.jp
抄録 Effects of K+ channel modulators, cromakalim and E4031 [1-[2-(6-methyl-2-pyridyl)-
ethyl]-4-(4-methylsulfonylaminobenzoyl) piperidine], on the relationship between the action …

Effects of calcium channel antagonists on Ca2+ transients in rat and canine cardiomyocytes

J Hensley, GE Billman, JD Johnson, CM Hohl… - Journal of molecular and …, 1997 - Elsevier
First-generation Ca2+ channel antagonists depress myocardial contractility, but many of the
newer Ca2+ channel blockers have a high degree of “vascular selectivity”. This study …

Effects of Mg2+ on Ca2+ waves and Ca2+ transients of rat ventricular myocytes

H Terada, H Hayashi, N Noda… - American Journal …, 1996 - journals.physiology.org
It has been shown that the occurrence of the transient inward current, which is responsible
for triggered activity, was often associated with propagating regions of increased …

Diltiazem facilitates inactivation of single L-type calcium channels in guinea pig ventricular myocytes

Y Niimi, N Hino, R Ochi - Japanese heart journal, 2003 - jstage.jst.go.jp
Diltiazem is a benzothiazepine Ca2+ channel blocker used clinically for its antihypertensive
and antiarrhythmic effects. We studied the mechanism of diltiazem blockade by recording L …

Voltage-and frequency-dependent modulation of L-type Ca2+ channel by MPC-1304, a novel calcium antagonist in guinea-pig hearts.

A Sunami, T Kanno, A Kanda - Archives Internationales de …, 1995 - europepmc.org
The electrophysiological effects of MPC-1304, a novel calcium antagonist, were examined
using the conventional microelectrode and whole-cell patch-clamp techniques in guinea-pig …

Extracellular site of action of phenylalkylamines on L-type calcium current in rat ventricular myocytes

JW Wegener, H Nawrath - Naunyn-Schmiedeberg's archives of …, 1995 - Springer
The effects of the phenylalkylamines verapamil, gallopamil, and devapamil on L-type
calcium currents (I Ca) were studied in ventricular myocytes from rat hearts using the whole …