Transcription: Each day the average human heart beats 100,000 times. The rate of your heartbeat is controlled by a natural pacemaker called the sinoatrial node located in the top right atrium or chamber of the heart. The sinoatrial node produces the electrical impulses that cause your heart to beat. These electrical impulses pass through the muscles of both atria causing them to contract. This forces blood into the ventricles or lower chambers of the heart. The electrical activity in the atria stimulates an additional electrical impulse, this time in the atrioventricular node. The second impulse causes the v ...
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