Cardiovascular Lab Notes
Cardiovascular Lab Notes 272-01LL
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This 1 page Class Notes was uploaded by Juliana Bernard on Wednesday February 25, 2015. The Class Notes belongs to 272-01LL at University of Massachusetts taught by Dr. Gordon in Spring2015. Since its upload, it has received 92 views. For similar materials see Anatomy and Physiology II Lab in Kinesiology at University of Massachusetts.
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Date Created: 02/25/15
Lab Week Jan 2327 Lab Notes Cardiovascular Physiology Cardiac cycle is regulated by a network of specialized cardiac muscle cells known as the cardiac conduction system Sinoatria SA node the heart39s pace maker located in the posterior wall of the right atrium During the cardiac cycle the opening and closing of the heart valves directs the flow of blood from atria to ventricles and from ventricles to the great vessels The closing of the valves produces the two distinctive heart sounds lub dub Auscutation areas for the heart the best locations to hear heart sounds on the anterior thoracic wall Four auscultation areas 1 Aortic semilunar area located in the second intercostal space just to the right of the sternum 2 Pulmonary semilunar area located in the second intercostal space just to the left of the sternum 3 Tricuspid area located in the left fifth intercostal space 4 Bicuspid area located in the left fifth intercostal space where the apex of the heart is found Blood Pressure Blood pressure is the force exerted by blood on the walls of blood vessels it is a function of the pumping action of the heart and the resistance to lood flow Systoic pressure during ventricular systole ventricular ejection stretches the wall of the aorta and the pressure inside the aorta reaches a peak 120 mm Hg Diastoic pressure during ventricular diastole the aortic semilunar valve closes and the elastic fibers in the wall of the aorta recoil to force blood fonNard aortic pressure declines to this minimum level 80 mm Hg Sphygmomanometer blood pressure cuff Korotkoff sounds the thumping sounds you hear that correspond to systolic blood pressure 4 pressure when the presence of sound occurs rst tapping sound heard systolic pressure 2quot 39 and 3rd sounds used to identify muffling changes murmurs and other abnormalities 4 pressure when change of pitch is heard diastolic pressure in exercising individual pediatric elderly 5 pressure when there is a disappearance of sound diastolic blood pressure Pulse pressure systolic pressure diastolic pressure Mean arterial pressure MAP the average pressure that drives blood through the systemic circulation