What is happening during ventricular repolarization?
What is happening during ventricular repolarization?
As pressure in the ventricles rises above two major arteries, blood pushes open the two semilunar valves and moves into the pulmonary trunk and aorta in the ventricular ejection phase. Following ventricular repolarization, the ventricles begin to relax (ventricular diastole), and pressure within the ventricles drops.
What is the repolarization wave?
The T wave represents ventricular repolarization. Generally, the T wave exhibits a positive deflection. The reason for this is that the last cells to depolarize in the ventricles are the first to repolarize.
What is the P wave QRS and T wave?
The P wave in an ECG complex indicates atrial depolarization. The QRS is responsible for ventricular depolarization and the T wave is ventricular repolarization.
What wave is ventricular depolarization?
Atrial depolarization is reflected by the P wave, and ventricular depolarization is reflected by the QRS complex, whereas the T wave reflects ventricular repolarization, see Figure 6.10.
Which ECG wave represents ventricular repolarization?
T waves
T waves represent ventricular repolarization (atrial repolarization is obscured by the large QRS complex).
What does QRS wave represent?
The QRS complex represents the depolarization of ventricles. It shows the beginning of systole and ventricular contraction. The QRS complex or wave starts with a small deflection downwards, represented by the point Q. It follows the P wave.
Which wave of ECG represents repolarization?
The T wave
The T wave on the ECG (T-ECG) represents repolarization of the ventricular myocardium.
What is the S wave in an ECG?
the S wave signifies the final depolarization of the ventricles, at the base of the heart.
What does the Q wave represent?
INTRODUCTION. By definition, a Q wave on the electrocardiogram (ECG) is an initially negative deflection of the QRS complex. Technically, a Q wave indicates that the net direction of early ventricular depolarization (QRS) electrical forces projects toward the negative pole of the lead axis in question.
What does the U wave represent?
The U wave is a small, rounded deflection sometimes seen after the T wave (see Fig. 2-2). As noted previously, its exact significance is not known. Functionally, U waves represent the last phase of ventricular repolarization.
What does R wave represent?
the R wave reflects depolarization of the main mass of the ventricles –hence it is the largest wave. the S wave signifies the final depolarization of the ventricles, at the base of the heart.