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Original ArticleOpen Access
Short an~ Intermediate Clinical Outcome After Late Coronary Stenting in Myocardial Infarction
Uerojanaungkul P 
,
Piamsomboon C ,
Roongsritong C ,
Laothavom P ,
Naksawasdi C ,
Sanguanwong S ,
Tanprasert P
,
Piamsomboon C ,
Roongsritong C ,
Laothavom P ,
Naksawasdi C ,
Sanguanwong S ,
Tanprasert P CHUMPOL PIAMSOMBOON, M;D.*,
PRASART LAOTHAVORN,M.D.*,
SOPON SANGUANWONG, M.D.*,
Background : The open artery theory has been proposed that late reperfusion of an occluded
coronary artery favorably affects clinical outcome. Myocardial reperfusion can be achieved in acute
myocardial infarction (AMI) by coronary angioplasty. Coronary stenting improves initial success
rate and reduces rate of restenosis. However, there are limited data regarding intermediate outcome
of late angioplasty with stenting.
Method : Between June 1998 and August 1999, one hundred and twenty-three patients
with AMI, and forty-four patients (37 males, 7 females) underwent late coronary stenting. Mean
age was 57
เธ‘ I
0 years. Echocardiography was performed before the procedure and at 6-months
follow-up.
Results : There were 36 Q-MI and 8 non Q-MI. The infarct-related artery (IRA) was left
anterior descending artery (LAD) 55 per cent, left circumflex artery (LCX) 15 per cent, and right
coronary artery (RCA) 30 per cent. Coronary stenting was successfully performed in all patients. Pre-
and post-procedural diameter stenosis were 90.5 เธ‘ 8.9 per cent and 2.2 เธ‘ 6.5 per cent. Stent indica-
tions were suboptimal results (68.2%), intimal dissection (20.4%), and acute closure (11.4%). Over
all in-hospital mortality was 2.27 per cent from sudden cardiac death. Mean follow-up was 11.41 เธ‘
4.79 months. There were 1 MI (2.3%), 2 CHF (4.65%), 1 unstable angina pectoris (2.3%), 1 transient
ischemic attack (TIA) (2.3% ), and no cardiac death. L VEF showed improvement at 6-months
follow-up (47.75
เธ‘
11.55%
vs
54.89
เธ‘
14.76%, p value
<
0.001)
Conclusion : Late coronary stenting of the IRA of patients with AMI is feasible, with few
complications. There was improved L VEF and intermediate clinical outcome.
Key word : Late Reperfusion, Open Artery Theory, Intracoronary Stenting, Echocardiography
PRASART LAOTHAVORN,M.D.*,
SOPON SANGUANWONG, M.D.*,
Background : The open artery theory has been proposed that late reperfusion of an occluded
coronary artery favorably affects clinical outcome. Myocardial reperfusion can be achieved in acute
myocardial infarction (AMI) by coronary angioplasty. Coronary stenting improves initial success
rate and reduces rate of restenosis. However, there are limited data regarding intermediate outcome
of late angioplasty with stenting.
Method : Between June 1998 and August 1999, one hundred and twenty-three patients
with AMI, and forty-four patients (37 males, 7 females) underwent late coronary stenting. Mean
age was 57
เธ‘ I
0 years. Echocardiography was performed before the procedure and at 6-months
follow-up.
Results : There were 36 Q-MI and 8 non Q-MI. The infarct-related artery (IRA) was left
anterior descending artery (LAD) 55 per cent, left circumflex artery (LCX) 15 per cent, and right
coronary artery (RCA) 30 per cent. Coronary stenting was successfully performed in all patients. Pre-
and post-procedural diameter stenosis were 90.5 เธ‘ 8.9 per cent and 2.2 เธ‘ 6.5 per cent. Stent indica-
tions were suboptimal results (68.2%), intimal dissection (20.4%), and acute closure (11.4%). Over
all in-hospital mortality was 2.27 per cent from sudden cardiac death. Mean follow-up was 11.41 เธ‘
4.79 months. There were 1 MI (2.3%), 2 CHF (4.65%), 1 unstable angina pectoris (2.3%), 1 transient
ischemic attack (TIA) (2.3% ), and no cardiac death. L VEF showed improvement at 6-months
follow-up (47.75
เธ‘
11.55%
vs
54.89
เธ‘
14.76%, p value
<
0.001)
Conclusion : Late coronary stenting of the IRA of patients with AMI is feasible, with few
complications. There was improved L VEF and intermediate clinical outcome.
Key word : Late Reperfusion, Open Artery Theory, Intracoronary Stenting, Echocardiography
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