Cardiac Arrhythmia refers to an irregular heartbeat, which can occur when the electrical signals that coordinate heartbeats malfunction. This can lead to the heart beating too fast, too slow, or in an uncoordinated manner. Common types include atrial fibrillation, ventricular tachycardia, and bradycardia. Symptoms may vary from person to person and can include palpitations, dizziness, or even fainting. While some arrhythmias are harmless, others can be serious and require medical attention. Diagnosis often involves electrocardiograms (ECGs) and other tests to determine the underlying cause and appropriate treatment.