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관상동맥 중재술을 받은 급성 심근경색증 환자에서 흡연 유무에 따른 임상경과

Clinical Outcomes of Persistent Smoking in Patients with Acute Myocardial Infarction Who Underwent Percutaneous Coronary Intervention

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목적: 흡연은 관상동맥 질환의 위험인자로 잘 알려져 있으나, 급성 심근경색증의 발생 후에도 여전히 흡연을 지속하는 경우가 있다. 관상동맥 중재술을 받은 급성 심근경색증 환자에서 흡연유무에 따른 임상적 특성을 파악하고, 흡연 지속유무에 따른 임상경과의 차이를 파악하고자 하였다. 방법: 2007년 1월부터 2007년 12월까지 전남대학교병원에 내원한 급성 심근경색증 환자 498명 중에서 관상동맥 중재술을 시행하고 1년 동안 추적관찰이 완료되어 분석 가능한 407명(63.9 ± 11.9세, 남자; 70%)을 대상으로 하였다. 그 중 흡연을 하는 급성 심근경색증 환자는 I군 164명(57.9 ± 11.2세, 남자 93%), 비흡연 급성 심근경색증 환자는 II군 243명(68.0 ± 10.6세, 남자; 55%)으로 분류하였고, 흡연가 중에서 지속적인 흡연 환자는 IΑ군 95명(56.8 ± 10.5세, 남자; 92%), 금연한 환자는IΒ군 69명(59.4 ± 12.0세, 남자; 96% )으로 분류하여 각 군 간의 임상적 특징과 관상동맥 조영술 소견 및 1년 간 주요 심장사건 및 사망률에 대해서 분석하였다. 결과: 전체 환자를 1년간 추적관찰하였을 때, 주요 심장 사건은 112예(27.6%) 였으며 사망은 42예(10.3%)에서 관찰되었다. 전체 환자 중 내원 시 흡연여부에 따른 임상경과를 비교한 결과, 흡연환자(I군)는 비흡연환자(II군)에 비해 1년간 주요 심장 사건은 유의한 차이를 보이지 않았으며, 사망률은 유의하게 낮았으나(I군: 6% vs. II군: 13%, p = 0.021), 다변량 분석 결과 내원 당시 흡연유무는 1년 사망률에 영향을 미치는 독립적인 인자는 아니었다. 흡연환자 중에서 관상동맥 중재술 시술 후 흡연지속여부에 따른 임상적 특징과 관상동맥 조영술 소견 및 1년간 임상경과를 비교한 결과, 흡연을 지속한 군(IΑ)에서 지속하지 않은 군(IΒ)에 비해 주요 심장사건은 유의한 차이를 보이지 않았으나 사망률은 유의하게 높았다[IΑ: 11% (n = 10) vs. IB: 0% (n = 0)]. 결론: 급성 심근경색증으로 관상동맥 중재술을 받은 환자에서 시술 후에도 지속적인 흡연을 하는 환자는 금연한 환자에 비하여 일 년 후 사망율이 높았다.

Abstract

Background/Aims:To analyze the clinical effects of continuing to smoke in patients with acute myocardial infarction (AMI), clinical outcomes of those continuing or ceasing smoking were compared. Methods:In total, 498 patients with AMI who underwent percutaneous coronary intervention (PCI) from January to December 2007 were enrolled. Of these patients, 407 (63.9 ± 11.9 years, males 70%) with 1-year follow-ups were analyzed. Based on risk factors for smoking, patients were divided into two groups: Group I (smokers, n = 164, 57.9 ± 11.2 years) and Group II (nonsmokers, n = 243, 68.0 ± 10.6 years). Additionally, Group I patients were subdivided by cessation of smoking after discharge: Group IA (current smokers, n = 95, 56.8 ± 10.5 years) and IB (past smokers, n = 69, 59.4 ± 12.0 years). Clinical characteristics, coronary angiographic and procedural findings, and 1year major adverse cardiac events (MACE) were analyzed. Results:During the 1-year follow-up period, MACE developed in 112 patients (27.6%) and death in 42 patients (10.3%). In terms of smoking habits at admission, there was no significant difference in the 1-year MACE between current smokers (Group I) and nonsmokers (Group II). In the subgroup analysis, there were no significant difference in clinical characteristics between Groups IΑ and IΒ. Mortality was significantly higher in Group IA than in Group IB during the 1-year clinical follow-up (11% vs. 0%; p = 0.005). Conclusions:Of the AMI patients who underwent PCI, mortality was significantly higher in current smokers than in past smokers after PCI. (Korean J Med 2011;80:562-570)

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