However, recent findings suggest that other cell types of the heart, such as connective tissue cells ('fibroblasts') and macrophages, may additionally affect action potential propagation and, thus ...

Electronic games have been shown to significantly increase the heart rate of participants. 2,3 Mental stress and heightened emotion have been shown to shorten the ventricular action potential and ...

A premature ventricular contraction occurs when a focus in the ventricle generates an action potential before the next scheduled sinoatrial nodal action potential. Premature, occurring earlier ...

A premature ventricular contraction occurs when a focus in the ventricle generates an action potential before the next scheduled sinoatrial nodal action potential. Ventricular bigeminy occurs when ...

Pittsburgh, PA - Scientists have developed new voltage-sensitive dyes that allow them to view and record cardiac action potentials from layers deep within the heart [1]. These new dyes will allow ...

Although TdP is not itself fatal, it can lead to life-threatening ventricular fibrillation and sudden cardiac death. 4,5 Figure 1. Left: A schematic of a ventricular action potential and the ...

Voltage-gated sodium (Na v) channels are responsible for mediating an "action potential" in muscle cells that leads to contraction.Na v 1.5 is the primary Na v channel expressed in the muscle ...