2025年2月4日 · Depolarization and repolarization are essential processes that maintain the heart’s electrical activity, ensuring the coordinated contractions necessary for efficient blood flow. Depolarization triggers the heart’s muscle cells to contract, while repolarization allows them to reset and prepare for the next beat.

What is the difference between depolarization vs repolarization of the heart that creates cardiac action potential? In order to understand how the PQRST waveform is created on the ECG, you have to understand these two terms.

When the electrical system of the heart does not operate as it is supposed to, early repolarization (ERP) can develop. ERP can be seen on an electrocardiogram (EKG). This painless procedure provides a picture of the electrical activity of the heart and how the heart is working.

2024年12月11日 · Depolarization and repolarization are essential parts of the heart’s cycle, affecting muscle contraction and relaxation. In simpler terms, depolarization is when the heart cells fire off an electrical signal to contract, while repolarization happens when the cells recharge for the next beat.

2023年4月17日 · Delayed repolarization in the human myocardium relies mainly on the vast diversity of cardiac potassium channels but also on a particular redundancy in the heart known as the "repolarization reserve," in which one current takes over if another one should fail.[1]

Early repolarization syndrome (ERS), demonstrated as J-point elevation on an electrocardiograph, was formerly thought to be a benign entity, but the recent studies have demonstrated that it can be linked to a considerable risk of life - threatening arrhythmias and sudden cardiac death (SCD).

2025年1月30日 · In simple terms, repolarization is the process where a cell restores its resting state after being activated. This process is especially important in nerve and muscle cells, such as those in the heart. It ensures that cells are ready to respond to the next signal.

2024年11月19日 · The term early repolarization (ER), also known as "J waves" or "J-point elevation," has long been used to characterize a QRS-T variant on the electrocardiogram (ECG). Most literature defines ER as being present on the ECG when there is J-point elevation of ≥0.1 mV in two adjacent leads with either a slurred or notched morphology.

2013年4月16日 · An algorithmic approach for the acute and chronic management of ventricular arrhythmia associate with early repolarization. Repolarization ECG features in patients presenting with ventricular fibrillation (VF) or polymorphic ventricular tachycardia (PMVT) …

Transmural repolarization in either the left or the right ventricle is one important context in which such changes can significantly alter the electrophysiological substrate in mammalian hearts. Repolarization in the mammalian ventricle normally progresses in an …