Question

In the ECG the QRS complex is produced by the

depolarization of the paracardium of the two ventricles
depolarization of the myocardium of the two ventricles
The depolarization of the myocardium of the two atria
The depolarization of the myocardium of the left atria and left vertricle

Answer 1

The QRS complex in an ECG is produced by the depolarization of the myocardium of the two ventricles. It represents the electrical activity during the contraction of the ventricles as they pump blood to the lungs and body.

Step-by-step explanation:

The QRS complex in an ECG is produced by the depolarization of the myocardium of the two ventricles. It represents the electrical activity during the contraction of the ventricles as they pump blood to the lungs and body. The QRS complex can be seen as a large spike on the ECG, and it has a typical shape and duration due to the complex path of the depolarization wave.