title: ST-segment re-elevation unrelated to left ventricular ejection fraction or volume after anterior wall acute myocardial infarction treated with successful reperfusion.
abstract: Ventricular remodeling is a major determinant of the long-term prognosis of patients with acute myocardial infarction (AMI). No previous study examined the relation of ST-segment re-elevation to left ventricular (LV) volume and function in patients with successful reperfusion. We examined the relation of ST-segment re-elevation to LV function and volume indices in 51 patients with anterior wall AMI who underwent successful reperfusion by direct coronary angioplasty. A 12-lead electrocardiogram was recorded once a day until 7 days after the onset of AMI. ST-segment shift was measured and Sigma ST was defined as the sum of ST-segment elevation obtained from leads V2, V3, and V4. ST-segment re-elevation was defined as present when the difference between maximal and minimal Sigma ST (Delta ST) was >0.3mV. LV indices were obtained from left ventriculography performed approximately 1 month after the onset of AMI. ST-segment re-elevation was observed in 15 patients (29%). No significant differences were observed between the ST- re-elevation group and non-ST-re-elevation group in LV ejection fraction (49.4+/-14.0 vs. 51.2+/-11.5%), LV end-systolic volume index (35.8+/-13.1 vs. 33.8+/-12.5 mL/m(2)) or LV end-diastolic volume index (69.7+/-12.8 vs. 68.3+/-14.4 mL/m(2)). The difference between maximal and minimal Sigma ST (Delta ST) was not significantly correlated with any LV index examined. In conclusion, the present study revealed that ST-segment re-elevation after successful reperfusion in anterior wall AMI patients was not related to LV volume or function, indicating that ST-re-elevation is not a clinically meaningful indicator of LV remodeling.
authors.affiliation: Department of Medicine and Medical Science, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Matano
authors.forename: Kohichiro
authors.initials: K
authors.lastname: Iwasaki
authors.forename: Shozo
authors.initials: S
authors.lastname: Kusachi
authors.forename: Takashi
authors.initials: T
authors.lastname: Murakami
authors.forename: Sekiko
authors.initials: S
authors.lastname: Kurazono
authors.forename: Hirosuke
authors.initials: H
authors.lastname: Yamaji
authors.forename: Hiromi
authors.initials: H
authors.lastname: Hamamoto
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Takamura
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Hina
authors.forename: Takao
authors.initials: T
authors.lastname: Tsuji
mesh_terms: D000368:Aged; D017023:Coronary Angiography; D003402:Creatine Kinase / Q000097:blood; D052279:Creatine Kinase, MB Form; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007527:Isoenzymes / Q000097:blood; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000503:physiopathology* / Q000601:surgery*; D015425:Myocardial Reperfusion; D013223:Statistics as Topic; D013318:Stroke Volume / Q000502:physiology*; D013997:Time Factors; D016896:Treatment Outcome; D014654:Vascular Patency / Q000502:physiology
chemical_list: D007527:Isoenzymes; D003402:Creatine Kinase; D052279:Creatine Kinase, MB Form