Unlike the action potential in skeletal muscle cells, the cardiac action potential is not initiated by nervous activity. Instead, it arises from a group...

action potentials, such as the cardiac action potential and the action potential in the single-cell alga Acetabularia, respectively. Although action potentials...

important differences. Electrical stimulation in the form of a cardiac action potential triggers the release of calcium from the cell's internal calcium...

upstroke of the cardiac action potential there is a large influx of Na+ ions. This depolarizes the cell and shifts the membrane potential in the positive...

of cardiac muscle (heart muscle) in all animals is initiated by electrical impulses known as action potentials that in the heart are known as cardiac action...

membrane potentials. As the membrane voltage begins to drop the channels recover from inactivation and carry current. Cardiac action potential Grant, Augustus...

cava. These cells can produce an electrical impulse known as a cardiac action potential that travels through the electrical conduction system of the heart...

main contributing current during the repolarizing phase 1 of the cardiac action potential. It is a result of the movement of positively charged potassium...

systole). Apex beat Cardiac action potential Cardiac output Pulse Pollock JD, Makaryus AN (3 October 2022). "Physiology: Cardiac cycle". StatPearls Publishing...

multiple modes of action, which makes any classification imprecise. The cardiac myocyte has two general types of action potentials: conduction system...

Lakatta, Edward G. (2015). "Potential effects of intrinsic heart pacemaker cell mechanisms on dysrhythmic cardiac action potential firing". Frontiers in Physiology...

the hERG channel mediates the repolarizing IKr current in the cardiac action potential, which helps coordinate the heart's beating. When this channel's...

each ventricular systole. Cardiac muscle tissue has autorhythmicity, the unique ability to initiate a cardiac action potential at a fixed rate – spreading...

Cardiac excitation-contraction coupling (Cardiac EC coupling) describes the series of events, from the production of an electrical impulse (action potential)...

change in voltage is referred to as an action potential. Unlike that in nerve cells, the cardiac action potential duration is closer to 100 ms (with variations...

abnormal depolarizations of cardiac myocytes that interrupt phase 2, phase 3, or phase 4 of the cardiac action potential in the electrical conduction...

sustained contractions because it forces the refractory period and cardiac action potential firing to be of the same length of time. Repolarization depends...

phase of the cardiac action potential. As such, it plays a major role in impulse propagation through the heart. A vast number of cardiac diseases is associated...

the entry of sodium in heart cells, causing prolongation of the cardiac action potential. Flecainide was approved for medical use in the United States in...

repolarization peak. Cardiac action potential Vigmond E.J, Tsoi V, Yin Y, Page P, & Vinet A. (2009). Estimating Atrial Action Potential Duration from Electrograms...

contributes to the repolarization of the cell, terminating the cardiac action potential and thereby the heart's contraction. It is a member of the KCNQ...

cardiomyocytes with fewer myofibrils and many mitochondria. They conduct cardiac action potentials more quickly and efficiently than any of the other cells in the...

an action potential. The cardiac action potential is created by the movement of specific electrolytes into and out of the pacemaker cells. The action potential...

caused by mutations in genes encoding ion channels that shorten the cardiac action potential, and appears to be inherited in an autosomal dominant pattern....

involved in cardiac repolarization during phase 3 of the action potential, so that this blockade prolongs the duration of cardiac action potentials, resulting...

steady heart beat. In the beginning of the cardiac cycle, the SA node generates an electrical action potential which spreads across the right and left atria...

grouped by their effect on the Na+ channel, and by their effect on cardiac action potentials. Class I agents are called Membrane Stabilizing Agents. 'Stabilizing'...

proteins to be exposed, which causes muscle contraction to occur. The cardiac action potential spreads distally (or outwardly) to the small branches of the Purkinje...

cardiac sodium channel, NaV1.5, responsible for the sodium current INa which depolarises cardiac cells at the start of the action potential. Cardiac sodium...

the increase in sodium permeability of the cardiac myocyte during Phase 0 of the cardiac action potential, in turn decreasing the inward sodium current...