Heartbeat rhythms refer to the pattern of heartbeats that occur in a regular cycle. The heart beats due to electrical signals that trigger contractions in the heart muscle, resulting in a consistent rhythm. This rhythm can vary based on factors such as activity level, stress, and overall health. There are different types of heartbeat rhythms, including normal sinus rhythm, which is the typical pattern, and arrhythmias, which are irregular rhythms. Monitoring these rhythms is essential for assessing heart health and can be done using devices like electrocardiograms (ECGs).