Cardiac Subspecialty Certification (CSC) Exam

Answer: D - Arrhythmia is defined as a condition that involves dysregulation of cardiac electrical activity. Arrhythmia can cause a slowing, speeding up, or irregular heartbeat. Tachycardia is a condition that occurs when an arrhythmia is faster than normal, whereas bradycardia is a condition that occurs when an arrhythmia beats slower than normal.
There are many types of arrhythmias including premature beats, supraventricular arrhythmias, ventricular arrhythmias, and bradyarrhythmias. Premature beats can originate in both atria and the ventricles. Supraventricular arrhythmias originate in the atria and include atrial fibrillation, atrial flutter, and Wolf-Parkinson-White syndrome. Bradycardias occur when the heart rate is below 60 beats per minute and can be categorized as sick sinus or conduction block.