ELECTRICAL CONDUCTION SYSTEM OF THE HEART - Normal intrinsic electrical conduction of the heart allows electrical propagation to be transmitted from the Sinoatrial Node through both atria and forward to the Atrioventricular Node. Normal/baseline physiology allows further propagation from the AV node to the ventricle or Purkinje Fibers and respective bundle branches and subdivisions/fascicles. Both the SA and AV nodes stimulate the Myocardium | Wikipedia

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Cardiac conduction system: sinoatrial node (SA), atrioventicular node (AV), bundle of HIS, left & right branch, purkinje fibers, purkinje network

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Corresponding Concept | 相應概念: SAN(Sinoatrial Node) | http://www.pinterest.com/benxy/sin-of-a-trial-%E8%A9%A6%E9%8D%8A%E4%B8%AD%E7%9A%84%E7%BD%AA%E6%83%A1/ | Pinned Date: 20140622 13:02, Sat., Taipei Time

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Premature Atrial Contractions (PAC’s) While the sinoatrial node typically regulates the heartbeat during normal sinus rhythm, PACs occur when another region of the atria depolarizes before the sinoatrial node and thus triggers a premature heartbeat.

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Isolated Heart conduction system, showing SA node via Sinoatrial node Wikipedia | 單獨的心臟傳導系統,顯示竇房結 via 竇房結英文維基百科 | Pinned Time: 20141130 01:43, Sun., Taipei Time.

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