Outcomes of patients with acute ST-segment elevation myocardial infarction treated by a prolonged “Deferred” percutaneous coronary intervention strategy

Table 1 Baseline demographic and clinical characteristics, n (%)

Characteristics	Patients with STEMI (n = 55)
Mean age, years	54
Gender
Male	39 (70.9)
Female	16 (29.1)
Diagnosis
AWMI	34 (61.8)
IWMI + PWMI	12 (21.8)
LWMI	1 (1.8)
IWMI + RVMI	8 (14.5)
Risk factor
DM	10 (18.2)
HTN	9 (16.4)
Tobacco chewers	13 (23.6)
LVEF at admission
< 40	9 (16.4)
40-50	32 (58.2)
≥ 50	14 (25.5)
Mean LVEF, %	44.2
LV systolic dysfunction at the time of presentation, %	74.6
Time of presentation to hospital in hours
0-12	21 (38.2)
12.1-24	21 (38.2)
24.1-48	9 (16.4)
Above 48	4 (7.3)
Thrombolysis
Yes	21 (38.2)
No	34 (61.8)
Killip class
I	31 (60)
II	14 (28)
III	5 (10)
IV	1 (2)
History
Prior MI	8 (16)
CABG	4 (8)
Mean heart rate, beats/minute	90
Mean SBP, mm Hg	106
Mean DBP, mm Hg	70
Mean eGFR, mL/min	60.2

STEMI: ST-segment elevation myocardial infarction; AWMI: Anterior wall myocardial infarction; IWMI: Inferior wall myocardial infarction; PWMI: Posterior wall myocardial infarction; LWMI: Lateral wall myocardial infarction; RVMI: Right ventricular myocardial infarction; DM: Diabetes mellitus; HTN: Hypertension; LVEF: Left ventricular ejection fraction; LV: Left ventricle; MI: Myocardial infarction; CABG: Coronary artery bypass graft; DBP: Diastolic blood pressure; SBP: Systolic blood pressure; eGFR: Estimated glomerular filtration rate.

Table 2 Angiographic data and treatment profile, n (%)

Characteristics	Patients with STEMI		P value
Culprit artery
LAD	34 (61.8)
LCX	7 (12.7)
RCA	14 (25.5)
	First angiogram	Second angiogram
Thrombus grade			0.127
Grade 0	0 (0)	30 (55.6)
Grade 1	0 (0)	13 (24.1)
Grade 2	10 (18.2)	9 (16.7)
Grade 3	18 (32.7)	2 (3.7)
Grade 4	18 (32.7)	0 (0)
Grade 5	9 (16.4)	0 (0)
Myocardial blush grade			0.179
Grade 0	0 (0)	0 (0)
Grade 1	21 (38.2)	0 (0)
Grade 2	30 (54.5)	20 (37)
Grade 3	4 (7.3)	34 (63)
TIMI flow grade			0.699
0	1 (1.8)	0 (0)
1	3 (5.5)	0 (0)
2	32 (58.2)	2 (3.7)
3	19 (34.5)	52 (96.3)
Culprit artery stenosis
< 70%	7 (12.73)	23 (42.59)
70%-95%	30 (54.55)	21 (38.89)
95%-99%	18 (32.73)	10 (18.52)
Culprit artery diameter, mm
mean ± SD	2.94 ± 0.29	3.13 ± 0.31
Median (range)	3.00 (2.25-3.50)	3.00 (2.25-3.50)
POBA/thrombosuction
Yes	4 (7.3)
No	51 (92.7)
LMWH
Yes	55 (100)
No	0 (0)
GP IIb/IIIa inhibitors
Yes	21 (38.2)
No	34 (61.8)

STEMI: ST-segment elevation myocardial infarction; LAD: Left anterior descending artery; LCX: Left circumflex artery; RCA: Right coronary artery; TIMI: Thrombolysis in myocardial infarction; POBA: Percutaneous old balloon angioplasty; LMWH: Low-molecular-weight heparin; GP II b/IIIa: Glycoprotein IIb/IIIa.

Table 3 Procedural outcomes and intraprocedural complications of deferred stenting, n (%)

Characteristics	Patients with STEMI
Procedural outcomes for all patients
Hospital course
Uneventful	33 (60)
AF	1 (1.8)
CHB	3 (5.4)
Death	1 (1.8)
Hypotension	8 (14.5)
LVF	5 (9)
LVF, AF	2 (3.6)
VT	2 (3.6)
Intraprocedural complications in patients with deferred stenting
No complications	46 (85.19)
Slow/no-reflow after PCI
Slow-reflow	4 (7.41)
No-reflow	4 (7.41)
No	46 (85.19)
MACE
Bradycardia	1 (1.85)
CHB	1 (1.85)
Hypotension	4 (7.41)
LVF	1 (1.85)
VT	1 (1.85)

STEMI: ST-segment elevation myocardial infarction; AF: Atrial fibrillation; CHB: Complete heart block; LVF: Left ventricular failure; VT: Ventricular tachycardia; PCI: Percutaneous coronary intervention; MACE: Major adverse cardiovascular events.