Updated Advanced Health Assessment - Cardiac 100% SOLUTION 2023//2024

Which two heart chambers are most anterior in the chest? A. Both atria B. Both ventricles C. The right atrium and ventricle D. The left atrium and ventricle - ANSWER ANS: C The most anterior surface of the heart is formed by the right ventricle. The heart is turned ventrally on its axis, putting its right side more forward. The left atrium is above the left ventricle, forming the most posterior aspect of the heart. The condition in which a patient's heart is either rotated or displaced to the right or is situated as a mirror image of the expected position is called: A. amyloidosis. B. coarctation. C. dextrocardia. D. situs inversus. - ANSWER ANS: C Dextrocardia occurs when the heart is displaced or rotated to the right or is a complete mirror image of the expected finding. Amyloidosis is a metabolic disorder marked by amyloid deposits in organs and tissues. Coarctation is the compression of the walls of a vessel such as an aortic coarctation. Situs inversus occurs when the heart and stomach are displaced to the right and the liver is located to the left. Heart position can vary depending on body habitus. In a short, stocky individual, you would expect the heart to be located: A. more to the right and hanging more vertically. B. more to the left and lying more horizontally. C. riding higher in the chest and pushed anteriorly. D. hanging lower in the chest and riding more vertically. - ANSWER ANS: B The position of the heart varies depending on body build, configuration of the chest, and level of the diaphragm. A tall, slender person's heart tends to hang vertically and is positioned centrally. A stocky, short person's heart tends to lie more to the left and more horizontally. Which cardiac structure is responsible for the heart's pumping action? A. Pericardium B. Epicardium C. Myocardium D. Endocardium - ANSWER ANS: C The myocardium is the thick muscular middle layer that is responsible for the pumping action of the heart. The pericardium is the tough, double-walled, fibrous sac that protects the heart. The epicardium is the thin outermost muscle layer that covers the heart and extends onto the great vessels. The endocardium is the innermost layer that lines the chambers of the heart and covers heart valves. Contraction of the ventricles causes: A. closure of the atrioventricular valves. B. closure of the pulmonic and aortic valves. C. opening of the auricular septa. D. opening of the mitral and tricuspid valves. - ANSWER ANS: A When the ventricles contract the semilunar valves, the pulmonic and aortic valves open, causing blood to rush into the pulmonary artery and the aorta. At this time, the tricuspid and mitral valves close, preventing backflow into the atria. When the atria contract, the tricuspid and mitral valves open, allowing blood flow into the ventricles. When the ventricles relax during diastole (ventricles are filling), the aortic and pulmonic valves close, preventing backflow into the ventricles. Which two structures together form the primary muscle mass of the heart? A. Right and left ventricles B. Left ventricle and the aorta C. Right and left atria D. Left atrium and the pulmonary vein - ANSWER ANS: A The ventricles are large, thick-walled chambers that pump blood to the lungs and throughout the body. The right and left ventricles together form the primary muscle mass of the heart. The left ventricle pumps blood through the aortic valve into the aorta, which provides blood to the rest of the body. The right and left atria pump blood through