L-1819-CV02.pptx - PHYL 1010 DEHY BLOCK YA 2853 Cardiovascular Physiology 2 Electrophysiology 4 Cardiovascular Physiology Endocrine Physiology 5 3 2 1

L-1819-CV02.pptx - PHYL 1010 DEHY BLOCK YA 2853...

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PHYL 1010 DEHY 2853 Endocrine Physiology Cardiovascular Physiology 1 2 3 BLOCK YA: Cardiovascular Physiology 2 Electrophysiology 4 5
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Skills Blood flow through heart Cardiac Electrical Signals Conduction Pathway Slow & Fast Action Potentials Regulation of Heart Rate ECG
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THE HEART pericardium – membranous sac encasing heart pericardial fluid – lubricates heart so it doesn’t “stick” as it contracts base – wide top of heart apex – “point” of heart Silverthorn Figure 14.5
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THE HEART blood passes through valves to get into and out of ventricles atrioventricular (AV) valves between atria & ventricles RV – tricuspid (3 flaps) LV – bicuspid (2 flaps) or mitral semilunar (SL) valves between ventricle & pulmonary artery or aorta RV – pulmonary valve LV – aortic valve Silverthorn Figure 14.5
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Silverthorn Figure 14.19 WIGGER’S DIAGRAM Electrical Signals
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the myocardial cells must contract in an orderly fashion for the heart to pump the blood up and out of the ventricles to accomplish this, electrical signals
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