Regional Coronary Anatomy in Rest Angina*

To determine If patients with rest angina have more severe regional Isehemla than padents with exertlonal aiigln., we compared the severity of left coronary artery (LCA) stenods In 29 patIents with transient anterior chemIc S’ -T changes at rest, and 30 patIents with anterior ST changes only during exertion. The percentage diameter stenosis w measured with Vernier calIpers (2 X lesion diameter X 100 percent)/(prestenotic + poslstenodc diameter). There w no difference between the two groups In the mean diameter stenods of unoecluded LCA vessels either when all vemels were compared (rest 69 ± 12 percent czartional: 70 ± 13 percent [p=NSD or when only the stenosis In each patient was compared (res#{252}