PSY 2210 Lecture Notes - Lecture 14: Atrial Septal Defect, Pericardium, Palpation
20 Nov 2017
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Document Summary
Blood vessel are arranged in two continuous loops pulmonary and systemic. When heart contracts it pumps blood simultaneously into both loops. S1 sound is heard at beginning of systole during pumping av nodes close to prevent regurgitation of blood back into atria. S2 sound is heard at end os systole regulated by blood pressure. S3 - normally silent and occurs when ventricles resit to lling during early rapid lling phase (prodiastole) sound can be heard in pregnancy women and athletes sign of congestive heart failure. S4 - occurs just before s1 (prediastole) gallop sound heard with myocardial ischemia or ventricular hypertrophy atria contact and ventricles resist. Murmur - can be caused by thyroid crisis increased velocity decreased viscosity structural defects of in valves, narrowed value, incompetent valves unusual opening occur in chambers (dilated chambers) functional murmur - murmurs caused by anemia, fever, or pregnancy.
