adj pertaining to the aorta. aortic incompetence regurgitation of blood from aorta back into the left ventricle. aortic murmur abnormal heart sound heard over aortic area; a systolic murmur alone is the murmur of aortic stenosis, a diastolic murmur denotes aortic incompetence. The combination of both systolic and diastolic murmurs causes the so-called “to and fro” aortic murmur. aortic stenosis narrowing of aortic valve; usually due to rheumatic heart disease or a congenital bicuspid valve defect predisposing to deposit of calcium.