Cardiac arrhythmias are irregular heartbeats that 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. These conditions can affect blood flow and may cause symptoms like palpitations, dizziness, or fatigue. While some arrhythmias are harmless, others can be serious and require medical attention. Treatment options vary and may include lifestyle changes, medications, or procedures like cardioversion or ablation.