#1
Which of the following is a characteristic feature of atrial fibrillation?
Regular rhythm
Absence of P waves
Prolonged PR interval
QRS complex widening
#2
Which of the following is a hallmark of sinus bradycardia?
Heart rate > 100 bpm
Irregular rhythm
Heart rate < 60 bpm
Absent QRS complexes
#3
Which of the following ECG findings is characteristic of atrial flutter?
Regular rhythm with normal PR interval
Absence of P waves
Sawtooth pattern
P waves preceding QRS complexes
#4
Which of the following is NOT a common cause of premature atrial contractions (PACs)?
Caffeine intake
Stress and anxiety
Hypertrophic cardiomyopathy
Electrolyte imbalances
#5
Which of the following ECG findings is characteristic of sinus tachycardia?
Regular rhythm with normal PR interval
Absence of P waves
Sawtooth pattern
P waves preceding QRS complexes
#6
What is the most common cause of ventricular fibrillation?
Coronary artery disease
Hypertension
Valvular heart disease
Arrhythmogenic right ventricular dysplasia
#7
What is the primary treatment for supraventricular tachycardia (SVT) in hemodynamically stable patients?
Electrical cardioversion
Vagal maneuvers
Antiarrhythmic drugs
Pacemaker insertion
#8
What is the typical ECG finding in a patient with atrioventricular (AV) block?
Prolonged PR interval
Absence of QRS complexes
ST-segment elevation
Widened QRS complex
#9
Which of the following is a characteristic feature of ventricular tachycardia?
Regular rhythm
Normal QRS duration
Absence of P waves
P waves preceding QRS complexes
#10
What is the hallmark ECG finding in hyperkalemia?
Peaked T waves
Prominent U waves
Prolonged QT interval
ST-segment depression
#11
Which medication is commonly used for rate control in atrial fibrillation?
Digoxin
Amiodarone
Verapamil
Lidocaine
#12
Which ECG pattern is characteristic of Wolff-Parkinson-White syndrome?
Sawtooth pattern
Delta waves
J-point elevation
ST-segment depression
#13
What is a potential complication of prolonged QT interval?
Hypertension
Syncope
Hyperkalemia
Atrial fibrillation
#14
What is the most common cause of sudden cardiac death in young athletes?
Myocardial infarction
Hypertrophic cardiomyopathy
Congenital heart defects
Long QT syndrome
#15
What is the primary treatment for torsades de pointes?
Beta-blockers
Defibrillation
Amiodarone
Magnesium sulfate
#16
What is the most common type of ventricular arrhythmia associated with a structurally normal heart?
Ventricular tachycardia
Ventricular fibrillation
Premature ventricular contractions
Torsades de pointes
#17
Which electrolyte imbalance is associated with a prolonged QT interval on ECG?
Hypokalemia
Hypercalcemia
Hyponatremia
Hypomagnesemia