heart conduction system
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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners.
heart conduction system |
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| navigate by keyword : anatomy aorta arteries artery atria atrial atrioventricular atrium blood cardiac cardiovascular cava chest circulatory conduction contraction coronary disease enlarged heart heartbeat human muscle muscles pacemaker pain pulmonary sinoatrial sulcus surgery terminalis valve valves vascular vein vena ventricular |
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| 1. The cardiac cycle begins at the SA (sinoatrial) node located in the sulcus terminalis between the superior vena cava and the right atrium. 2. From this pacemaker, a wave of negativity (excitation) spreads over both atria and initiates atrial contraction, thereby increasing atrial blood pressure. 3. When atrial pressure exceeds ventricular pressure, both atrioventricular (AV) valves open and bl |
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Stockphotos.ro (c) 2026. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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