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급성하벽심근경색 환자에서 흉부유도 ST 절하강의 임상적 의의
Clinical Significance of Precordial ST Segment Depression in Patients with Acute Inferior Myocardial Infarction
이성구(Sung Ku Lee),백효종(Hyo Jong Baek),서상문(Sang Moon Suh),천병도(Byung Do Chun),이중기(Choong Ki Lee),김신우(Shin Woo Kim),우언조(Eon Jo Woo),강승완(Seung Wan Kang),채성철(Shung Chull Chae),전재은(Jae Eun Jun),박의현(Wee Hyun Park)
UCI I410-ECN-0102-2009-510-004687268

The prognostic significance of precordial ST segment depression during early stages of acute inferior myocardial infarction is controversial. To examine this problem, electrocardiographic findings on admission were compared with the clinical variables in 50 patients with a first transmural inferior infarction. Patients were classified according to the admission ECG obtained an average of 7.0hours after the onset of chest pain. Twenty-five patients (group I) had≥1.0mm ST depression in at least one of leads V1 to V6 and 25 (group II) did not. There were no significant differences between the two groups in peak creatinine kinase activity, prevalence of in-hospital complications (i, e., congestive heart failure, hypotension, arrhythmias requiring treatment and death), and maximal ST elevation in inferior lead. A weak correlation existed between the quantities (mV) of inferior ST segment elevation and precordial ST depression (r=0.43, p<0.05). Thus, precordial ST depression during acute inferior infarction is not a reliable marker of the extent of myocardial damage or an adverse hospital course. Precordial ST segment depression might represent a benign electrical phenomenon.

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