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Table 1 Clinical characteristics and outcomes stratified by ST resolution (STR)

From: Does pre-angiography Total ST-segment resolution reliably predict spontaneous reperfusion of the infarct-related artery in patients with acute myocardial infarction?

Variable

STR ≥ 70% n = 77 (22%)

30% ≤ STR < 70% n = 160 (46%)

STR < 30% n = 112 (32%)

P

Patient characteristics

 Age (years)

61.2 ± 7.3

62.1 ± 8.4

60.0 ± 7.8

0.12

 Male (%)

75.3

74.4

71.4

0.15

 Smoking (%)

55.8

52.5

58.0

0.26

 Hypercholesterolemia (%)

41.6

37.5

40.2

0.54

 Diabetes mellitus (%)

9.1

12.5

21.4

0.03

 Renal insufficiency (%)

5.2

5.6

8.0

0.09

 Previous infarction (%)

6.5

7.5

8.9

0.14

 Heart rate (bpm)

75.6 ± 8.2

72.0 ± 9.3

77.9 ± 7.7

0.87

 Killip class > 1 (%)

11.4 ± 3.2

15.8 ± 3.8

19.4 ± 4.6

0.08

 Left ventricular ejection fraction (%)

56.6 ± 7.9

52.0 ± 8.2

42.4 ± 7.6

0.02

Home medication (%)

 Aspirin

21.3

24.1

22.6

0.12

 Clopidogrel

6.2

5.7

5.2

0.64

 Statins

16.4

17.7

15.7

0.55

 β blockers

12.4

14.1

13.8

0.76

 ACE inhibitors/ATII antagonists

27.3

24.5

25.7

0.14

Ischemia characteristics

 Total ischemic time (min) *

445.6 ± 46.2

481.7 ± 48.4

473.0 ± 41.3

0.07

 Anterior MI (%)

45.5

40.0

42.8

0.13

 Non-anterior MI (%)

54.5

60.0

57.2

0.45

 Maximal cTnI (ng/mL)

0.54 ± 0.08

2.82 ± 0.25

6.03 ± 0.52

< 0.001

 Creatine kinase-MB (U/L)

54.0 ± 6.3

168.0 ± 14.4

276.0 ± 26.3

< 0.01

 Multi vessel disease (%)

35.0

32.5

33.9

0.41

Initial TIMI flow (%)

 0

14.3

36.3

80.4

< 0.001

 1

7.8

9.4

6.3

0.45

 2

26.0

26.9

9.8

< 0.001

 3

51.9

27.5

3.5

< 0.001

Baseline Rentrop classification (%)

 0–1

62

66

59

0.23

 2–3

38

34

41

0.26

Treatment characteristics (%)

 Stent implantation

93.5

95.6

95.5

0.54

 Platelet glycoprotein IIb/IIIa inhibitors

42.9

48.8

57.1

0.03

Post-procedural TIMI flow (%)

 0

1.3

1.2

2.7

0.02

 1

1.3

4.4

8.0

0.01

 2

6.5

9.4

21.4

0.01

 3

90.9

85.0

67.9

0.03

Medical treatment at discharge (%)*

 Aspirin

100

100

100

1

 Clopidogrel

100

100

100

1

 Statins

100

100

100

1

 β-blockers

96.1

98.1

94.4

0.42

 ACE inhibitor/ATII antagonists

64.9

59.5

65.4

0.56

  1. cTnI: cardiac troponin I; MI: myocardial infarction; STR: ST resolution; TIMI: thrombolysis in myocardial infarction. * interval from symptom onset to balloon dilation. ACE: angiotensin converting enzyme; ATII: angiotensin receptor subtype II; CV: cardiovascular; STR: ST resolution; TIMI: thrombolysis in myocardial infarction