electrocardiography, the atrial action potential are action potentials that occur in the heart atrium. They are similar to ventricular action potential with the exception...

intercalated discs which allow the action potential to pass from one cell to the next. This means that all atrial cells can contract together, and then...

pacemaker potential or current which drives rhythmic modulation of firing rate. Some pacemaker action generate rhythms for the heart beat (sino-atrial node)...

An action potential (also known as a nerve impulse or "spike" when in a neuron) is a series of quick changes in voltage across a cell membrane. An action...

Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular beating of the atrial chambers of...

atrial cells) into pacemaker cells. This is achieved by making the cells express a gene which creates a pacemaker current. Pacemaker action potential...

that are used to suppress abnormally fast rhythms (tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia....

atrium is roughly cube-shaped except for an ear-shaped projection called an atrial appendage, previously known as an auricle. All animals with a closed circulatory...

cells are less equipped to contract compared to the atrial and ventricular cells. Action potentials pass from one cardiac cell to the next through pores...

producing a wave of electrical impulses that stimulates atrial contraction by creating an action potential across myocardium cells. Impulses of the wave are...

electrophysiology, the threshold potential is the critical level to which a membrane potential must be depolarized to initiate an action potential. In neuroscience,...

cardiac abnormalities, including: Cardiac rhythm disturbances, such as atrial fibrillation and ventricular tachycardia; Inadequate coronary artery blood...

tachycardia include: Adrenergic storm Anaemia Anxiety Atrial fibrillation Atrial flutter Atrial tachycardia Atrioventricular reentrant tachycardia AV...

and prevent blood clots and to prevent stroke in people with nonvalvular atrial fibrillation through directly inhibiting factor Xa. It is used as an alternative...

Premature atrial contractions (PACs) Wandering atrial pacemaker Atrial tachycardia Multifocal atrial tachycardia Supraventricular tachycardia (SVT) Atrial flutter...

electrical pathway (therefore favoring 1:1 atrial to ventricle conduction through the pre-excitation pathway, potentially leading to unstable ventricular arrhythmias)...

therapeutic response in which a prolonged action potential increases myocytes’ cardiac refractoriness in case of atrial fibrillation and flutter. Ibutilide...

and cardiac output, the conduction system of the heart has: Substantial atrial to ventricular delay. This will allow the atria to completely empty their...

Nattel, Stanley (1998-07-01). "Ionic mechanisms underlying human atrial action potential properties: insights from a mathematical model". American Journal...

treat various heart conditions. Most frequently it is used for atrial fibrillation, atrial flutter, and heart failure. Digoxin is one of the oldest medications...

during a cardiac cycle, once an action potential is initiated, there is a period of time that a new action potential cannot be initiated. This is termed...

ventricles are the discharging chambers. In late ventricular diastole, the atrial chambers contract and send blood to the ventricles. This flow fills the...

ventricular tachycardia, ventricular fibrillation, and wide complex tachycardia, atrial fibrillation, and paroxysmal supraventricular tachycardia. Evidence in cardiac...

Premature atrial contraction (PAC), also known as atrial premature complexes (APC) or atrial premature beats (APB), are a common arrhythmia characterized...

recent-onset atrial fibrillation and atrial flutter. Class IV drugs are calcium (Ca) channel blockers. They work by inhibiting the action potential of the SA...

prone to the occurrence of atrial fibrillation and flutter arrhythmias, and for chemical cardioversion to sinus rhythm from atrial fibrillation and flutter...

fast response action potentials. They either do not change the action potential duration, or they may decrease the action potential duration. Class Ib drugs...

in the irregular (and often fast) atrial fibrillation. Digitalis is hence often prescribed for patients in atrial fibrillation, especially if they have...

membrane potential that returns it to a negative value just after the depolarization phase of an action potential which has changed the membrane potential to...

to shorten the cardiac action potential, which in turn increases the risk of developing abnormal heart rhythms including atrial fibrillation and ventricular...