09HEART.WKN

09HEART.WKN - Human Physiology I. II. Chapter 9 Cardiac...

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Human Physiology Chapter  9 Cardiac Physiology PAH 0 I. Introduction It may be necessary to jump ahead to relate some lab items : e.g. ions, drugs. *  II. Anatomical Considerations a) Heart Tissue==Heart Wall Intercalated Discs===>gap junction plus desmosome  ==>Syncytium b) Heart Location within Chest Cavity----placing stethoscope c) Heart Valves and Blood Flow (review, now or later) III. Electrical Activity of the Heart-->EKG/ECG a) SA-Node=Pacemaker  (Pacemaker/P-Cells activity)  . ..Myogenic -Know the location of the NODES and the sequence of the electrical flow and its purpose.   b)  (normal)Sinus  Rhythm Note the Universal scheme  of  Einthoven’s  Triangle====>Remember for lab c) Action Potential and contraction of Cardiac Muscle showing Plateau--handout What causes the plateau?   Fast and Slow Channels---Na+, Ca++ =====> Review from prior material Any advantages?   Compare to skeletal muscle twitch /contraction. 
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09HEART.WKN - Human Physiology I. II. Chapter 9 Cardiac...

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