UAP (n=67)

SAP (n=35)

p-value

Vessel

 

 

 

LAD

28 (42)

14 (40)

0.862

LCX

9 (13)

7 (20)

0.387

RCA

30 (45)

14 (40)

0.644

Location

 

 

 

Proximal

39 (58)

15 (37)

0.140

 Mid

21 (31)

13 (31)

0.555

 Distal    

7 (10)

7 (31)

0.183

Qualitative analysis

 

 

 

Ulceration

10 (15)

3 (9)

0.534

Intimal flap

1 (1)

0 (0)

0.999

Lumen irregularity

9 (13)

3 (9)

0.538

Thrombus

8 (12)

0 (0)

0.048

 Complex lesion

25 (37)

6 (17)

0.030

Quantitative analysis

 

 

 

Reference vessel diameter, mm

3.3 ± 0.4

3.2 ± 0.6

0.111

Minimal lesion diameter, mm

0.6 ± 0.2

0.8 ± 0.3

<0.001

Percent diameter stenosis, %

80 ± 7

74 ± 6

<0.001


Values are given as n (%) or mean standard deviation. UAP = unstable angina pectoris; SAP = stable angina pectoris; LAD = left anterior descending coronary artery; LCX = left circumflex coronary artery; RCA = right coronary artery
Table 2: Angiographic findings.