An irregular heartbeat, also known as arrhythmia, occurs when the heart beats too quickly, too slowly, or in an uneven pattern. This can happen due to various factors, including stress, caffeine, or underlying health conditions. While some irregularities are harmless, others may require medical attention. Symptoms of an irregular heartbeat can include palpitations, dizziness, or shortness of breath. Doctors often use electrocardiograms (ECGs) to diagnose the condition and determine its cause. Treatment options may range from lifestyle changes to medications or procedures, depending on the severity and underlying issues.