the quantitative assessment of angiographic patterns showed the cold and nitroglycerin tests to change significantly the extent of stenosis in patients with spontaneous angina ( by +13.3 and -30.8 % , respectively ) and those with angina of effort and at rest ( by +5.6 and -12.0 % , respectively ) and have no such effect in patients with angina of effort .
C0017887
nitroglycerin
C0002962
angina