Effect of disopyramide on potassium currents in rabbit ventricular myocytes

L Virág, A Varró, JG Papp - Naunyn-Schmiedeberg's archives of …, 1998 - Springer
Abstract The effects of disopyramide (1–30 μM) on the 4-aminopyridine sensitive transient
outward current (I to), on the rapid component of the delayed rectifier potassium current (I Kr) …

Characterization of 4-aminopyridine block of the transient outward K+ current in adult rat ventricular myocytes

NA CASTLE, MT SLAWSKY - The Journal of pharmacology …, 1993 - jpet.aspetjournals.org
The blocking action of 4-aminopyridine (4-AP) on the transient outward K+ current (I TO) in
isolated rat ventricular myocytes was studied using the whole-cell configuration of the patch …

Different mechanisms of the inhibition of the transient outward current in rat ventricular myocytes

U Jahnel, P Klemm, H Nawrath - Naunyn-Schmiedeberg's archives of …, 1994 - Springer
The mechanism of drug-induced inhibition of the transient outward current, I to, has been
investigated in rat ventricular myocytes using the whole cell patch clamp technique. I to was …

Triamterene inhibits the delayed rectifier potassium current (IK) in guinea pig ventricular myocytes.

P Daleau, J Turgeon - Circulation research, 1994 - Am Heart Assoc
In humans, proarrhythmia during therapy with action potential-prolonging drugs can be
associated with hypokalemia often provoked by concomitant administration of diuretic …

Voltage-dependent inhibition of the ATP-sensitive K+ current by the class Ia agent disopyramide in cat ventricular myocytes.

FG De Lorenzi, TR Bridal… - The Journal of …, 1995 - jpet.aspetjournals.org
The inhibition of the adenosine triphosphate-sensitive K+ (KATP) current by disopyramide, a
class Ia antiarrhythmic drug, was studied using whole cell voltage clamp in cat ventricular …

Interrelation between pinacidil and intracellular ATP concentrations on activation of the ATP-sensitive K+ current in guinea pig ventricular myocytes.

K Nakayama, Z Fan, F Marumo, M Hiraoka - Circulation research, 1990 - Am Heart Assoc
The patch-clamp technique was used to study the relation between pinacidil and
intracellular ATP concentration [(ATP] i) on the activation of the outward K+ current in guinea …

Tedisamil blocks the transient and delayed rectifier K+ currents in mammalian cardiac and glial cells.

ID Dukes, L Cleemann… - The Journal of …, 1990 - jpet.aspetjournals.org
The potassium currents in rat and guinea pig ventricular myocytes and mouse astrocytes
were studied using tedisamil, a novel antiarrhythmic agent. A 1 to 20 microM dosage of …

Inhibition of transient outward K+ current by DHP Ca2+ antagonists and agonists in rabbit cardiac myocytes

Y Gotoh, Y Imaizumi, M Watanabe… - American Journal …, 1991 - journals.physiology.org
The 1, 4-dihydropyridine (DHP) Ca2+ antagonists and agonists can inhibit a time-and
voltage-dependent, but intracellular Ca (2+)-independent transient outward K+ current (It), in …

New observations on the mechanisms of antiarrhythmic actions of disopyramide on cardiac membranes

M Hiraoka, K Kuga, S Kawano, A Sunami… - The American journal of …, 1989 - Elsevier
Electrophysiologic effects of disopyramide on cardiac membranes were studied using the
microelectrode technique applied to papillary muscles and the suction pipette whole-cel …

[PDF][PDF] Disopyramide block of cardiac sodium current after removal of the fast inactivation process in guinea pig ventricular myocytes.

SI Koumi, R Sato, I Hisatome, H Hayakawa… - … of Pharmacology and …, 1992 - Citeseer
To determine the necessity of sodium channel fast inactivation for the block of sodium
current (l) by disopyramide, we studied the effects of disopyramide on l in guinea pig …