Chap 18 Case Study

1135 WordsMar 19, 20155 Pages
1. Dr. Baker spends a long time listening to (auscultating) Caleb’s heart. a. Where on the thoracic surface do you auscultate to the tricuspid, mitral (bicuspid), pulmonary, and aortic valves? Auscultation for the tricuspid valve would be in the left sternal margin of the 5th intercostal space. The mitral valve sounds are heard over the apex of the heart (5th intercostal space) in line with the middle of the clavicle. Pulmonary valve sounds are auscultated at the 2nd intercostal space at the left sternal margin. The aortic valve is heard at the 2nd intercostal space of the right sternal margin. b. Where do you think would be the best place to auscultate Caleb’s abnormal heart sound? Explain your answer. The abnormal heart…show more content…
Atrioventricular Canal Defect is an abnormality that causes the mixing of blood. There is a hole in center of heart where the wall between the upper and lower chambers meet. The tricuspid and mitral valves aren’t formed properly and one large valve crosses the defect. The defect lets oxygen rich blood pass to the heart’s right side and mix with deoxygenated blood, then go back to the lungs. Another abnormality is Atrial Septal Defect (ASD), where the walls of the upper chambers of the heart don’t close completely, causing a left to right movement of blood due to the higher pressure. The mixing of oxygenated and deoxygenated blood may cause the right atrium and ventricle to enlarge due to the higher volume of blood. 6. What happens to Caleb’s systemic cardiac output as a result of his ventricular septal defect (VSD)? Explain your answer. Caleb’s systemic cardiac output will be decreased. His blood will enter the right ventricle be pumped to the lungs, return to the left ventricle and then be shunted back to the right ventricle. This causes more blood to enter the right ventricle. The extra blood then leaving the right ventricle causes a volume overload to the lungs. Because blood is being shunted back to the right ventricle, there is a lesser volume of oxygenated blood that leaves the heart to supply the rest of the body. 7. One of the problems that worried Tiffaney was that Caleb seemed to be breathing too hard all the
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