Cardiac Arrhythmias Review Quiz

Ventricular fibrillation often leads to sudden loss of consciousness due to inadequate blood flow to the brain.

Paroxysmal supraventricular tachycardia is the most common type of SVT characterized by sudden onset and termination.

Hypertension is a common risk factor for atrial fibrillation, contributing to structural changes in the heart.

Ventricular tachycardia is characterized by wide QRS complexes on the ECG due to abnormal ventricular activation.

Atrial fibrillation is characterized by rapid, irregular contractions of the atria, leading to ineffective pumping of blood into the ventricles.

Regular exercise is not a risk factor for atrial fibrillation and is, in fact, beneficial for heart health.

Class III antiarrhythmic drugs work by prolonging the repolarization phase of the cardiac action potential primarily by blocking potassium channels.

Atrial flutter is characterized by sawtooth pattern waves, also known as F waves, on the ECG.

Atrial fibrillation is characterized by rapid and irregular atrial contractions with a narrow QRS complex on ECG.

Atrial fibrillation is typically characterized by an irregularly irregular rhythm with a heart rate above 150 beats per minute.

Long-term atrial fibrillation can lead to blood clots forming in the atria, increasing the risk of stroke.

Adenosine acts by transiently activating potassium channels, leading to hyperpolarization and interruption of reentrant pathways.

Torsades de pointes is often associated with hypokalemia, leading to prolonged QT interval and subsequent ventricular arrhythmias.

AVNRT typically arises from a reentrant circuit within the atrioventricular node and is not commonly associated with rheumatic heart disease.

Class I antiarrhythmic drugs, particularly IC agents, are known for their proarrhythmic effects, potentially worsening arrhythmias.