Question

Measure the QRS complex with the longest duration and clearest onset and end. In adults, the normal QRS duration is 0.## seconds or less. The QRS duration is a measurement of the time required for ____. The width of a QRS complex is most accurately determined when it is viewed and measured in more than one lead. The measurement should be taken from the QRS complex with the longest duration and clearest onset and end.

Answer 1

The QRS complex represents ventricular depolarization in the heart and is measured to assess the duration of this process. The normal QRS duration in adults is 0.## seconds or less. The measurement should be taken from the QRS complex with the longest duration and clearest onset and end, typically seen in lead II.

Step-by-step explanation:

The QRS complex is a prominent feature on an Electrocardiogram (ECG) and represents the depolarization of the ventricles in the heart. It is composed of three waves: Q, R, and S. The duration of the QRS complex is measured to assess the time required for ventricular depolarization. In adults, the normal QRS duration is 0.## seconds or less. The measurement should be taken from the QRS complex with the longest duration and clearest onset and end, which is typically seen in lead II.