Question

The direction of the T wave is normally the same as the _____ that precedes it.

1) QRS complex
2) ST segment
3) endocardial surface
4) epicardium

Answer 1

The direction of the T wave is normally the same as the QRS complex that precedes it on an electrocardiogram (ECG), representing ventricular depolarization and subsequent repolarization.

Step-by-step explanation:

The direction of the T wave is normally the same as the QRS complex that precedes it. The P wave, QRS complex, and T wave are prominent points on an electrocardiogram (ECG). The P wave represents atrial depolarization, while the large QRS complex indicates ventricular depolarization. Ventricular contraction begins as the QRS reaches the R wave's peak. The QRS complex also masks the atrial repolarization during this process. Lastly, the T wave reflects ventricular repolarization, which occurs after ventricular contraction.