[Influence factors on coronary collateral development].

In order to evaluate the influence factors on coronary collateral development, we compared various factors between two groups. Group I consisted of the 69 patients performed coronary angiography within 6 hours after the onset of acute myocardial infarction (MI) and Group II consisted of the 56 patients without MI because having good collaterals nevertheless whose one coronary artery was totally occluded or had a 99% stenosis. Group I (24/69, 35%) had a higher frequency of Diabetes mellitus than Group II (11/56, 20%) and had a lower frequency (30/69, 43%) of multivessel disease than Group II (39/56, 70%). The patients having angina duration more than 6 months were more in Group II (37/56, 60%) than in Group I (18/69, 26%). No significant differences existed between these two groups in age, smoke, hyperlipidemia and hypertension. In conclusions, the patients with good collateral have high frequency of multivessel disease and long history of angina pectoris. Diabetes mellitus is a inhibit factor on coronary collateral development.