The cardiac pacemaker is the heart's natural rhythm generator. It employs pacemaker cells that produce electrical impulses, known as cardiac action potentials, which control the rate of …

2023年7月17日 · In the heart, electrical impulses are generated by specialised pacemaker cells and spread across the myocardium in order to produce a co-ordinated contraction in systole. …

2023年4月17日 · Pacemaker cells are highly specialized myocardial cells with an intrinsic ability to depolarize rhythmically and initiate an action potential. The pacemaker cells are located …

Even in simple contractile cardiac tubes in primitive invertebrates, cardiac function is controlled by intrinsic, autonomous pacemaker cells. Understanding the evolutionary origin and …

List the phases of cardiac autorhythmic cell action potentials and explain the ion movements that occur in each phase.

2024年3月28日 · Over the past 2 decades, efforts in creating biological pacemakers have been centered on overexpressing or suppressing ionic currents (functional reengineering) and …

Batteryless pacemakers that harvest cardiac mechanical motion to generate current, or that modify or add cells to introduce biological pacing activity, are under active investigation. In …

2023年7月30日 · The action potential for cardiac pacemaker cells (SA node, AV node, and bundle of His/Purkinje fibers) is unique to the AP of general cardiac myocytes. These cells undergo …

The sinoatrial node contains a unique class of cardiomyocytes termed cardiac pacemaker cells, which autonomously oscillate membrane potential leading to the rhythmic, spontaneous …

Pacemaker cells generate electrical activity that spreads to other heart cells in an orderly pattern to create rhythmic muscle contractions.