@studymed.zone: Normal Sinus Rhythm — Your Heart’s Natural Pacemaker at Work A normal sinus rhythm (NSR) means the heart is beating in a healthy, coordinated pattern. The electrical signal starts from the sinoatrial (SA) node — the heart’s natural pacemaker — located in the right atrium. This signal travels through the heart in a precise sequence, causing the atria and ventricles to contract in sync and pump blood efficiently. In adults, a normal sinus rhythm usually ranges between 60–100 beats per minute at rest. On an ECG, NSR shows a regular rhythm with properly timed electrical waves. A healthy heartbeat isn’t random — it’s controlled electrical precision happening every second. #ECG #heart #physiology #reels #medical

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Thursday 21 May 2026 17:05:42 GMT