Ventricular action potential - Wikipedia
In electrocardiography, the ventricular cardiomyocyte membrane potential is about −90 mV at rest, which is close to the potassium reversal potential. When an action potential is generated, the membrane potential rises above this level in five distinct phases.
1. Phase 4: Resting membrane potential remains stable at ≈−90 mV.
2. Phase 0: Rapid depolarisation, shifting the voltage to positive. Specialised membrane proteins (voltage-gated sodium channelsWikipedia · CC-BY-SA 许可下的文字- 预计阅读时间：2 分钟
Ventricular Action Potentials - Cardiac Cycle - TeachMePhysiology
- Potassium (K+) currents are the main determinant of the resting membrane potential as the membrane is far more permeable to K+ than any other ion. At rest K+ channels are open, therefore resting membrane potential tends towards the equilibrium potential for K+ (EK), which is roughly -70mV.
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Cardiac action potential - Wikipedia
The standard model used to understand the cardiac action potential is that of the ventricular myocyte. Outlined below are the five phases of the ventricular myocyte action potential, with reference also to the SAN action potential.
In the ventricular myocyte, phase 4 occurs when the cell is at rest, in a period known as diastole. In the standard non-pacemaker cell the voltage during this …Wikipedia · CC-BY-SA 许可下的文字Cardiac Action Potentials – The Student Physiologist
Cardiac action potentials differ from the APs found in other areas of the body. Typical neural AP duration is around 1ms and those of skeletal muscle are roughly 2-5ms, whereas cardiac action potentials range from 200-400ms.
Cardiac electrophysiology: Action potential, automaticity and …
The action potential includes a depolarization (activation) followed by a repolarization (recovery). The action potential occurs in all cardiac cells but its appearance varies depending on cell …
Cardiac Ion Channels | Circulation: Arrhythmia and …
2009年4月1日 · This review describes the generation of the normal cardiac action potential. The properties of the major ionic currents are the examined in detail. Special emphasis is placed on the functional consequences of arrhythmia …
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Physiology, Cardiac Repolarization Dispersion and …
2023年4月17日 · An action potential is the rapid sequence of changes in the membrane potential, resulting in an electrical impulse. This electrical impulse then travels down through the heart's electrical conduction system to cause …
Action Potentials - CV Physiology
Learn about the three types of cardiac action potentials: non-pacemaker, pacemaker, and His-Purkinje. Compare their characteristics, such as depolarization rate, calcium involvement, and duration.
Cardiac electrophysiology and ECG interpretation
The cardiac action potential. The action potential includes a depolarization (activation) followed by a repolarization (recovery). As mentioned above, the cardiac cycle starts when the sinoatrial node discharges the first action …
Physiology Philes: Cardiac Action Potential • LITFL • BSCC
2020年11月3日 · Learn how a cardiac myocyte generates an action potential with sodium, potassium and calcium channels, and how it affects conduction and refractoriness. Explore the phases, clinical correlates and antiarrhythmics of …
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