Repolarization of ventricles is the process by which the ventricles of the heart return to their resting state after a cardiac contraction. It is characterized by a decrease in the electrical activity of the cardiac muscle cells, which allows the heart to reset and prepare for the next contraction.
During the cardiac cycle, ventricular repolarization occurs in the latter part of the T-wave of the electrocardiogram (ECG). The depolarization and repolarization of ventricles are represented by the QRS complex and T wave respectively.
Repolarization of ventricles is a complex process that involves the movement of ions such as potassium, sodium, and calcium through several channels in the cardiac cells. The movement of these ions creates an electrochemical gradient that drives the repolarization process.
Abnormalities in ventricular repolarization can lead to various cardiac disorders such as arrhythmias, ventricular tachycardia, and ventricular fibrillation, which can be life-threatening. Therefore, monitoring of the repolarization process through ECG is an essential diagnostic tool for identifying and managing cardiac disorders.
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