Which of the following characterizes ventricular tachycardia?

Ventricular tachycardia (VT) is characterized by a specific set of electrical activity patterns in the heart. One of the defining features of VT is the presence of wide QRS complexes, which occur due to the abnormal depolarization of the ventricles. This wide QRS complex reflects that the electrical impulses are originating from the ventricles themselves or are conducted through the ventricles in an abnormal manner, rather than through the normal conduction system.

Additionally, VT is typically associated with a heart rate that exceeds 100 beats per minute. This elevated heart rate can lead to reduced cardiac output and may result in symptoms such as dizziness, shortness of breath, or hypotension, depending on the duration and severity of the tachycardia.

Thus, the key characteristics of ventricular tachycardia—wide QRS complexes and a heart rate greater than 100 beats per minute—are critical for proper identification and management of this potentially life-threatening condition.