title: Myocardial damage after successful thrombolysis is associated with the duration of ST re-elevation at reperfusion.
abstract: The purpose of this study was to investigate the significance of ST re-elevation at reperfusion using strict criteria for patient inclusion and exclusion. Twenty-nine patients who had a first anterior infarction with single-vessel disease, successful recanalization by intracoronary thrombolysis (ICT) with urokinase, and an angiographically confirmed patent infarct-related artery after 4 weeks, were divided into three groups according to the deviation of the ST segment at reperfusion: Group A, 10 patients with sustained ST re-elevation; Group B, 10 patients with transient ST re-elevation; and Group C, 9 patients with ST reduction. Left ventricular (LV) function was evaluated from cineventriculograms performed in the 30 degrees right anterior projection 4 weeks after ICT. LV ejection fraction and regional wall motion of the infarct area, evaluated by the centerline method (SD/chords), were significantly lower in Group A (44 +/- 10%, -3.2 +/- 0.4) than in Group B (61 +/- 9%, -1.9 +/- 0.7) and Group C (60 +/- 5%, -2.0 +/- 0.4) (p < 0.01). Peak creatine kinase (CK) activity was significantly higher in Group A (5848 +/- 2112 IU) than in Group B (2485 +/- 1254 IU) and Group C (1889 +/- 1525 IU) (p < 0.05). These data suggest that a sustained ST re-elevation at reperfusion was strongly associated with marked LV dysfunction and higher peak CK activity. It was concluded that sustained, not transient, ST re-elevation associated with successful reperfusion indicates extensive myocardial damage.
authors.affiliation: Second Department of Internal Medicine, Teikyo University School of Medicine, Tokyo, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Ochiai
authors.forename: T
authors.initials: T
authors.lastname: Isshiki
authors.forename: Y
authors.initials: Y
authors.lastname: Hirose
authors.forename: H
authors.initials: H
authors.lastname: Toyoizumi
authors.forename: A
authors.initials: A
authors.lastname: Oshima
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.forename: T
authors.initials: T
authors.lastname: Sato
authors.forename: H
authors.initials: H
authors.lastname: Miyashita
authors.forename: T
authors.initials: T
authors.lastname: Tamura
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D017023:Coronary Angiography; D003402:Creatine Kinase / Q000032:analysis; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007527:Isoenzymes; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000188:drug therapy* / Q000503:physiopathology; D015425:Myocardial Reperfusion; D015428:Myocardial Reperfusion Injury / Q000503:physiopathology*; D011379:Prognosis; D012189:Retrospective Studies; D015912:Thrombolytic Therapy / Q000379:methods; D014568:Urokinase-Type Plasminogen Activator / Q000008:administration & dosage / Q000627:therapeutic use*; D016277:Ventricular Function, Left / Q000187:drug effects / Q000502:physiology
chemical_list: D007527:Isoenzymes; D003402:Creatine Kinase; D014568:Urokinase-Type Plasminogen Activator