RESUMEN
We analysed the clinical and angiography features of 40 males with isolated significant lesions of the anterior descending coronary artery [LAD]. Collaterals [C] graded according to their caliber diameter and the rate of retrograde filling of the LAD into poor. 25 patients had moderate or rich C [Group A] and 15 patients had into or poor C [Group B]. Both groups were compared in relation to age, smoking, hypercholesterolaemia, family history of coronary disease, diabetes, BP, pulse pressure, presence of angina pectoris [AP], incidence of myocardial infarction [M.I.], severity of LAI lesion and left ventricular ejection fraction. Group A patients had a significantly wider pulse pressure [48.4 +/- 11.7 versus 34.6 +/- 10.7 P< 0.01], lower incidence of AP [60% versus 87%, P< 0.01] and M.I. [64% versus 80%, P< 0.05]. There was no significant difference in relation to the other variables analysed. These features conform with previously reported obervations except for the observed wider pulse pressure in patients with significant inficant C to the LAD