Certified Cardiographic Technician (CCT) Practice Exam 2025 - Free CCT Practice Questions and Study Guide

Atrial fibrillation is characterized by an irregular and often rapid heart rate that occurs when the upper chambers of the heart (the atria) experience chaotic electrical signals. This disruption in the normal rhythm leads to ineffective contractions of the atria, which can cause blood to pool and increase the risk of clot formation.

The condition typically results in a heartbeat that can vary in rate and rhythm, leading to symptoms such as palpitations, shortness of breath, and fatigue. It's important to recognize that this abnormal rhythm can either be persistent or paroxysmal, and although it often causes a faster heart rate, not every patient will experience a rapid heart rate at all times.

In comparison, a fast and regular heart rhythm describes conditions such as atrial flutter or sinus tachycardia, a normal heart rhythm is associated with a regular and organized heartbeat, and a complete lack of electrical activity in the heart is known as asystole. None of these terms accurately represent the nature of atrial fibrillation, making the description of an irregular and often rapid heart rate the most appropriate choice.