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Effects of thrombolytic regimen, early catheterization, and predischarge angiographic variables on six-week left ventricular function

Academic Article
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Overview

authors

  • Ward, S. R.
  • Sutton, J. M.
  • Pieper, K. S.
  • Schwaiger, M.
  • Califf, R. M.
  • Topol, Eric

publication date

  • March 1997

journal

  • American Journal of Cardiology  Journal

abstract

  • The Thrombolysis and Angioplasty in Acute Myocardial Infarction phase 5 (TAMI-5) trial randomized patients to 1 of 3 thrombolytic regimens (alteplase, urokinase, or both), then further randomized them to acute or deferred catheterization. The group of patients randomized to acute catheterization had improved infarct zone but not global left ventricular function on predischarge left ventriculography. To better explore the late effects of these strategies on global and regional left ventricular function, a subset of patients (n = 296) were prospectively evaluated at 6 weeks by multiple uptake gated acquisition (MUGA) radionuclide ventriculography scan. Of these patients, 219 had interpretable studies with paired predischarge and late left ventriculographic data for comparison. At 6 weeks, choice of thrombolytic regimen had no impact on either global or infarct-zone left ventricular function. Further, catheterization strategy (acute vs deferred) did not influence global or infarct-zone function at 6 weeks. In patients randomized to acute catheterization, those undergoing rescue angioplasty had worse infarct-zone wall motion at 6 weeks than patients with a patent infarct vessel not requiring rescue angioplasty (p = 0.002). The early benefit on regional left ventricular function of triage to acute catheterization after thrombolysis for acute myocardial infarction did not persist at 6 weeks, which is most likely attributable to a high incidence of reocclusion. The worse infarct-zone regional wall motion in patients undergoing rescue angioplasty in the acute-catheterization group likely reflects failed reperfusion and illustrates the difficulty in identifying and consequences of early thrombolytic failures.

subject areas

  • Aged
  • Angioplasty, Balloon, Coronary
  • Coronary Angiography
  • Female
  • Fibrinolytic Agents
  • Follow-Up Studies
  • Gated Blood-Pool Imaging
  • Humans
  • Incidence
  • Male
  • Middle Aged
  • Myocardial Contraction
  • Myocardial Infarction
  • Myocardial Reperfusion
  • Patient Discharge
  • Prospective Studies
  • Recurrence
  • Thrombolytic Therapy
  • Tissue Plasminogen Activator
  • Treatment Failure
  • Urokinase-Type Plasminogen Activator
  • Ventricular Function, Left
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Identity

International Standard Serial Number (ISSN)

  • 0002-9149

PubMed ID

  • 9068505
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Additional Document Info

start page

  • 539

end page

  • 544

volume

  • 79

issue

  • 5

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