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is a 60-year-old man with a cane. He seems to be having trouble breathing. You l

ID: 207399 • Letter: I

Question

is a 60-year-old man with a cane. He seems to be having trouble breathing. You listen to his chest and hear fluid in came in, and his heart rate is elevated. His chart says he has bicuspid regurgitation, a valve that doesn 't close (Upts). Explain why somebody with a bicuspid regurgitation might have a low systolic blood pressure. Mr. G hear a systolic murmur when you listen to his heart. His systolic blood pressure is low compared to the last time he properly allowing for backfnlow of blood, and left-sided heart failure. 1 Mr G talks in short bursts with frequent breaths. He tells you he used to feel breathless when he was walking, but now he has hen having more and more trouble breathing even when he is lying down at night. When you listened to his lungs you heard fluid in them. er normal conditions during isovolumetric contraction the pressure in the ventricles increase until they overcome the semilunar valves. In the case of Mr. G, what is happening to some of the blood during 3. (Ipt). How does this change the ejection fraction? 4. (lpt). Based on your answer to question 3, how would this effect SBP? 5. (2pts). Based on your answer to question 4, how would the baroreceptor reflex respond?

Explanation / Answer

Answer 1. When the leaflets of the aortic valve do not come together well, it is possible for blood to flow back or leak into the heart again. This is called regurgitation or insufficiency. This leakage puts a strain on the heart, because it must re-pump some of the same blood again. As a result, the left ventricle becomes over loaded and stretches in diameter (dilated ) so it possess low systolis blood pressure.