VI2 - VI. Heart Physiology Heart Sounds: Stethoscope...

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Heart Physiology VI. Heart Sounds: Stethoscope Listening A. Overview of Heart Sounds 1. lub-dub, - , lub, dub, - 2. lub - closure of AV valves, onset of ventricular systole 3. dub - closure of semilunar valves, onset of diastole 4. pause - quiescent period of cardiac cycle 5. tricuspid valve (lub) - RT 5th intercostal, medial 6. mitral valve (lub) - LT 5th intercostal, lateral 7. aortic semilunar valve (dub) - RT 2nd intercostal 8. pulmonary semilunar valve (dub) - LT 2nd intercostal B. Heart Murmurs 1. murmur - sounds other than the typical "lub-dub"; typically caused by disruptions in flow 2. incompetent valve - swishing sound just AFTER the normal "lub" or "dub"; valve does not completely close, some regurgitation of blood 3. stenotic valve - high pitched swishing sound when blood should be flowing through valve; narrowing of outlet in the open state VII. Cardiac Output - Blood Pumping of the Heart A. General Variables of Cardiac Output 1. Cardiac Output (CO) - blood amount pumped per minute
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VI2 - VI. Heart Physiology Heart Sounds: Stethoscope...

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