The severity of aortic valvular regurgitation is graded angiographically after contrast injection into the aortic root as follows: 1+. small amount of contrast material enters left ventricle during diastole. but is cleared from left ventricle during systole; 2+. left ventricle is faintJy opacified by contrast
media during diastole and not cleared during systole; 3+, left ventricle is progressively opacified; 4+. left ventricle is completely opacified during the first diasto le and remains so for several beats. Note: recognize there are four grades for aortic valvular regurgitation reflecting the severity of the problem.