Table 1

Clinical, Angiographic and Hemodynamic Correlates of Collateral Vessels During Coronary Occlusion

Collateral Vesselsp Value
Absent (n = 54)Present (n = 51)
Age (yr)57 ± 957 ± 90.71
Male39 (72%)41 (80%)0.33
NYHA functional class
 II–III24 (44%)29 (57%)0.39
 IV30 (56%)22 (43%)0.28
Systemic hypertension6 (11%)12 (24%)0.10
Cigarette smoking31 (57%)27 (53%)0.65
Total cholesterol >6.5 mmol/liter15 (28%)16 (31%)0.69
Diabetes mellitus3 (6%)2 (4%)0.70
Medication
 Beta-blocker45 (83%)43 (84%)0.89
 Nitrates40 (74%)30 (59%)0.07
 Calcium antagonist48 (89%)41 (80%)0.23
Duration of angina (mo)3 ± 46 ± 70.01
LAD47 (87%)36 (71%)0.08
Proximal coronary narrowing22 (41%)31 (61%)0.06
Quantitative angiography
 Diameter (%)74 ± 1282 ± 100.001
 MLD (mm)0.75 ± 0.380.53 ± 0.320.001
Pao (mm Hg)100 ± 9100 ± 131.0
Pw/Pao0.27 ± 0.120.35 ± 0.130.005
Rcoll/Rcla21.3 ± 106.7 ± 7.40.001
ST segment shift (mV)0.38 ± 0.330.14 ± 0.190.001

Data are presented as number (%) of patients or mean value ± SD. LAD = left anterior descending coronary artery; MLD = minimal lumen diameter; NYHA = New York Heart Association; Pw/Pao = mean coronary wedge pressure/mean aortic pressure; Rcoll/Rcla = collateral resistance/resistance of contralateral artery.