Figure 1.mbg

Representative case with CMB augmented by nitroglycerin.
A, Before nitroglycerin there were minor luminal irregularities in middle portion of LAD in diastole.
B, In systole, this segment was slightly narrowed by CMB.
C, After nitroglycerin, coronary segments including CMB dilated in diastole.
D, Under these conditions, CMB was markedly augmented as observed by angiography in systole.