#1
Which structure in the heart is responsible for initiating the electrical impulse?
#2
What is the normal resting heart rate (beats per minute) initiated by the SA node?
#3
Which part of the heart's conduction system delays the impulse briefly to allow the atria to contract before the ventricles?
#4
Which ion plays a crucial role in the depolarization phase of the cardiac action potential?
#5
What is the primary role of the AV node in the cardiac conduction system?
#6
Which of the following is NOT a common site for ectopic pacemaker activity?
#7
What ECG characteristic is indicative of atrial fibrillation?
#8
In atrial flutter, what is the typical atrial rate?
#9
Which arrhythmia is characterized by a regular rhythm but with an absent QRS complex?
#10
Which medication is commonly used for acute termination of supraventricular tachycardias (SVTs) such as AV nodal reentrant tachycardia (AVNRT)?
#11
Which of the following is a potential complication of untreated atrial fibrillation?
#12
What is the most common cause of ventricular tachycardia?
#13
Which electrolyte imbalance is associated with the development of torsades de pointes?
#14
What is the most common type of supraventricular tachycardia (SVT)?
#15
What is the classic ECG finding in ventricular fibrillation?
#16
What is the primary mechanism of action of beta-blockers in the treatment of arrhythmias?
#17