The American Society of Echocardiography adopted the "leading edge" method of measurement because: A. People were turning up the gain too much. B. The nature of the interaction between ultrasound and anatomical interfaces makes this advisable. C. The advent of gray-scale M mode made this possible. D. It produces the most consistent and reproducible measurements. D. In 1978 the American Society of Echocardiography recommended that all echo measurements be taken from the leading edge of each structure so that all laboratories would be using a consistent method. -It produces the most consistent and reproducible measurements. The term basilar area of the ventricle refers to the: A. Ventricular myocardium at the apex B. Mid segments of the ventricle C. Ventricular myocardium at the atrioventricular valves. D. None of the above. C. The basilar area of the heart is at a level near the AV valves. -Ventricular myocardium at the atrioventricular valves. The infudibulum is related to the area of the right ventricle called the: A. inflow tract B. Outflow C. Apical area D. Subvalvular area B. The infundibulum is a funnel shaped passage leading directly out the right ventricle. -Outflow tract The three primary branches of the aortic arch include all of the following EXCEPT the: A. Innominate artery B. Right subclavian artery C. Left common carotid artery D. Left subclavian artery B. The right subclavian artery arises from the innominate (brachiocephalic trunk). -The right subclavian The term tunica intima refers to which of the following: A. The inner lining of the arterial wall B. The outer lining of the arterial wall