Table 1 Baseline characteristics of the patients according to the randomization allocation

Age-years

64.2 ± 10.9

61.9 ± 12.5

0.445

Male sex-no. (%)

50

44

0.347

Body mass index

25.0 ± 2.8

24.5 ± 3.7

0.602

History

 Hypertension-no. (%)

28 (46.7)

34 (56.7)

0.438

 Current smoking-no. (%)

44 (73.3)

34 (56.7)

0.176

 Previous myocardial infarction

0 (0)

0 (0)

NA

 Diabetes mellitus-no. (%)

12 (20)

8 (13.3)

0.488

 Previous stroke-no. (%)

8 (13.3)

4 (6.7)

0.389

 Previous atrial fibrillation-no. (%)

2 (3.3)

2 (3.3)

1.000

Medication used

 ACEI-no. (%)

0 (0)

1 (3.3)

0.313

 ARB-no. (%)

4 (6.7)

2 (3.3)

0.554

 CCB-no. (%)

8 (13.3)

10 (16.7)

0.718

 Metformin-no. (%)

2 (3.3)

4 (6.7)

0.554

 β-blocker-no. (%)

0

4 (6.7)

0.492

 Clopidogrel-no. (%)

44 (73.3)

40 (66.7)

0.779

 Ticagrelor-no. (%)

16 (26.7)

20 (33.3)

0.779

Fibrinolysis before randomization-no. (%)

0 (0)

4 (6.7)

0.492

Door-to-balloon time-min

67 ± 17

67 ± 25

0.972

Pain onset to reperfusion-hour

7.6 ± 2.3

7.5 ± 2.1

0.651

Target coronary artery

0.663

 Left coronary artery-no. (%)

28 (46.7)

24 (40)

 Left circumflex-no. (%)

4 (6.7)

8 (13.3)

 Right coronary artery-no. (%)

28 (46.7)

28 (46.7)

Multivessel coronary disease-no. (%)

30 (50)

30 (50)

1.000

Killip class-no. (%)

0.431

 1

54

52

 2

4

8

 3

2

0

 4

0

0

Systolic blood pressure in lab-mmHg

125.4 ± 21.0

120.2 ± 21.2

0.359

Diastolic blood pressure in lab-mmHg

79.8 ± 16.6

75.7 ± 13.7

0.301

Heart rate in lab-bpm

76.9 ± 11.6

84.1 ± 20.9

0.095

Thrombus burden-no. (%)

0.643

 0

2 (3.3)

6 (10)

 1

6 (10)

10 (16.7)

 2

4 (6.7)

6 (10)

 3

4 (6.7)

6 (10)

 4

6 (10)

2 (3.3)

 5

38 (63.3)

30 (50)

Laboratory tests

 Total cholesterol-mmol/L

3.8 ± 2

3.9 ± 1.8

0.893

 LDL-mmol/L

3.2 ± 0.94

2.9 ± 0.98

0.335

 C-reactive protein-mg/L

6.8 ± 19

4.5 ± 6.5

0.560

 Creatinine-mmol/L

80.2 ± 20.1

77.6 ± 20.2

0.627

 Troponin (CTn)-ng/L

6319.7 ± 3559

6275.4 ± 3451.8

0.961

Ejection fraction (EF)-%

51.8 ± 8.6

53.7 ± 10.1

0.427

Characteristics of the procedural data

 Direct stenting-no. (%)

30 (50)

18 (37.5)

0.114

 Thrombectomy-no. (%)

20 (33.3)

10 (16.7)

0.136

 Predilation balloon diameter-mm

2.4 ± 0.21

2.4 ± 0.21

0.945

 No. of stents-no. (%)

1.13 ± 0.35

1.17 ± 0.38

0.723

Type of drug-eluting stent-no. (%)

0.554

 PROMUS Element

56 (93.3)

58 (96.7)

 GuReater

4 (6.7)

2 (3.3)

Total stent length-mm

33.1 ± 14.5

31.3 ± 14.6

0.640

Stent diameter-mm

3.17 ± 0.29

3.09 ± 0.41

0.418

Inflation time-seconds

35.87 ± 10.38

10.07 ± 7.19

< 0.0001

Inflation pressure-atm

13.47 ± 1.28

13.40 ± 2.23

0.890

Postdilation-no. (%)

5 (16.7)

9 (30)

0.222

Medication use-no. (%)

 Glycoprotein IIb/IIIa inhibitor

32 (53.3)

30 (50)

0.796

 Nitroprusside

0 (0)

4 (6.7)

0.492

 Diltiazem

2 (3.3)

4 (6.7)

0.554