Electrocardiography and Cardiac Rhythms Quiz

Ventricular depolarization is represented by the QRS complex.

Approximate heart rate is 75 bpm if there are 5 large squares between two R waves on ECG paper with a standard speed of 25 mm/s.

The T wave in an ECG represents ventricular repolarization.

Lead aVL is used to monitor the electrical activity of the lateral wall of the heart.

Lead V1 is used to monitor the electrical activity of the septal wall of the heart.

Normal PR interval duration on ECG ranges from 0.06 to 0.10 seconds.

Characteristic ECG finding in atrial fibrillation is the absence of P waves.

The ST segment on an ECG represents ventricular repolarization.

Lead II is commonly used to monitor the inferior wall of the heart.

A peaked T wave on an ECG suggests ventricular repolarization.

Lead II is used to monitor the electrical activity of the inferior wall of the heart.

The most common cause of a widened QRS complex on an ECG is bundle branch block.

Prolonged QT interval on ECG indicates ventricular repolarization.

Ventricular fibrillation is characterized by chaotic and irregular QRS complexes.

Hypokalemia is commonly associated with a prolonged QT interval on an ECG.

A characteristic feature of Wolff-Parkinson-White (WPW) syndrome on an ECG is the presence of a delta wave.

The primary role of the QRS complex in an ECG is the depolarization of the ventricles.

The characteristic ECG finding in ventricular tachycardia is wide QRS complexes.

Second-degree heart block type I is characterized by a progressively lengthening PR interval until a QRS complex is dropped.