Heart rhythm refers to the pattern of electrical impulses that trigger the heart to beat. These impulses originate from a group of cells in the heart called the sinoatrial node, which acts as the natural pacemaker. A normal heart rhythm is typically steady and ranges from 60 to 100 beats per minute at rest. When the heart rhythm is irregular, it can lead to conditions such as arrhythmias, which may cause symptoms like palpitations or dizziness. Monitoring heart rhythm is essential for diagnosing and managing heart health, often using tools like electrocardiograms (ECGs) to visualize the electrical activity of the heart.