#1
Which of the following is a characteristic of sinus rhythm?
Regular rhythm with a rate between 60-100 beats per minute
Irregular rhythm with a rate above 100 beats per minute
Regular rhythm with a rate above 100 beats per minute
Irregular rhythm with a rate between 60-100 beats per minute
#2
What is the most common sustained arrhythmia?
Atrial fibrillation
Atrial flutter
Ventricular fibrillation
Ventricular tachycardia
#3
Which of the following is a potential complication of untreated atrial fibrillation?
Hypertension
Heart failure
Hypothyroidism
Gout
#4
What is the term for a heart rate below 60 beats per minute?
Tachycardia
Bradycardia
Fibrillation
Palpitation
#5
Which of the following is a common symptom of ventricular tachycardia?
Prolonged PR interval
Chest pain
Regular pulse
Irregular rhythm
#6
Which ECG finding is characteristic of atrial fibrillation?
Regularly irregular rhythm with absent P waves and irregularly spaced QRS complexes
Regular rhythm with sawtooth-shaped P waves
Irregularly irregular rhythm with normal P waves and QRS complexes
Regular rhythm with prolonged PR interval
#7
What is the term for a condition where the heart's electrical impulses originate from an ectopic focus in the ventricles?
Atrial flutter
Premature ventricular contraction
Ventricular tachycardia
Ventricular fibrillation
#8
What is the term for a prolonged QT interval on an ECG?
Bradycardia
Torsades de pointes
Long QT syndrome
Bundle branch block
#9
What is the preferred treatment for ventricular fibrillation?
Defibrillation
Amiodarone
Verapamil
Adenosine
#10
Which electrolyte abnormality is associated with a widened QRS complex on an ECG?
Hyperkalemia
Hypokalemia
Hypernatremia
Hypomagnesemia
#11
Which of the following medications is commonly used to terminate supraventricular tachycardias?
Lidocaine
Amiodarone
Adenosine
Procainamide
#12
What is the primary action of calcium channel blockers in the treatment of dysrhythmias?
Increase heart rate
Decrease myocardial contractility
Prolong the action potential duration
Stimulate the sympathetic nervous system
#13
Which of the following ECG findings is characteristic of ventricular fibrillation?
Regular rhythm with wide QRS complexes
Regular rhythm with narrow QRS complexes
Irregular rhythm with absent P waves and chaotic QRS complexes
Regular rhythm with absent P waves and wide QRS complexes
#14
Which of the following medications is commonly used to terminate ventricular tachycardia?
Adenosine
Amiodarone
Lidocaine
Procainamide
#15
What is the term for the sudden cessation of organized electrical activity in the heart resulting in loss of cardiac output?
Ventricular fibrillation
Pulseless electrical activity
Asystole
Torsades de pointes