Electrocardiography and Cardiac Electrophysiology Quiz

Atrial depolarization is represented by the P wave in an ECG.

The QRS complex represents ventricular depolarization in an ECG.

Prolonged QT interval is commonly associated with hypokalemia, an electrolyte imbalance.

The normal duration of the PR interval in an ECG is 0.06-0.12 seconds.

The QT interval in an ECG represents the time interval between the end of ventricular depolarization and the beginning of ventricular repolarization.

Lead aVF is commonly used to assess the electrical activity of the inferior wall of the heart in an ECG.

The PR interval in an ECG corresponds to the time it takes for an impulse to travel from the atria to the ventricles, including atrial contraction.

The T wave in an ECG is associated with ventricular repolarization.

The segment of an ECG that represents the time when the ventricles are fully depolarized and in a contracted state is termed the ST segment.

Chaotic, irregular atrial activity is characteristic of atrial fibrillation, a cardiac arrhythmia.

The sinoatrial (SA) node is responsible for initiating atrial depolarization in cardiac electrophysiology.

Amiodarone primarily affects potassium channels, prolonging the action potential duration, as an antiarrhythmic medication.

The abnormal conduction of electrical impulses in the heart, resulting in a reentrant circuit, is termed Wolff-Parkinson-White syndrome.

The role of the atrioventricular (AV) node in cardiac electrophysiology is to delay electrical signals to the ventricles.

The primary function of the His-Purkinje system in the heart is conducting impulses to the ventricles.

Atrial flutter is characterized by a rapid, regular atrial rhythm with a sawtooth pattern on ECG.