REVERSE-USE DEPENDENCE OF ANTIARRHYTHMIC DRUGS: ROLE OF LATE SODIUM CURRENT.

An emerging antiarrhythmic target: late sodium current.

The cardiac late sodium current (INa,L) has been in the focus of research in the recent decade. The first reports on the sustained component of voltage activated sodium current date back to the seventies, but early studies interpreted this tiny current as a product of a few channels that fail to inactivate, having neither physiologic nor pathologic implications. Recently, the cardiac INa,L has ...

Class 1: Sodium Channel Blockers – Antiarrhythmic Drugs

Use of antiarrhythmic drugs in elderly patients

Human aging is a global issue with important implications for current and future incidence and prevalence of health conditions and disability. Cardiac arrhythmias, including atrial fibrillation, sudden cardiac death, and bradycardia requiring pacemaker placement, all increase exponentially after the age of 60. It is important to distinguish between the normal, physiological consequences of agin...

Blocking Scn10a channels in heart reduces late sodium current and is antiarrhythmic.

RATIONALE Although the sodium channel locus SCN10A has been implicated by genome-wide association studies as a modulator of cardiac electrophysiology, the role of its gene product Nav1.8 as a modulator of cardiac ion currents is unknown. OBJECTIVE We determined the electrophysiological and pharmacological properties of Nav1.8 in heterologous cell systems and assessed the antiarrhythmic effect...

Integrative Physiology Blocking Scn10a Channels in Heart Reduces Late Sodium Current and Is Antiarrhythmic

Rationale: Although the sodium channel locus SCN10A has been implicated by genome-wide association studies as a modulator of cardiac electrophysiology, the role of its gene product Nav1.8 as a modulator of cardiac ion currents is unknown. Objective: We determined the electrophysiological and pharmacological properties of Nav1.8 in heterologous cell systems and assessed the antiarrhythmic effect...