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J Am Coll Cardiol, 2005; 46:417-424, doi:10.1016/j.jacc.2005.04.042 (Published online 5 July 2005).
© 2005 by the American College of Cardiology Foundation
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CLINICAL RESEARCH: CLINICAL TRIAL

Combined Angioplasty and Pharmacological Intervention Versus Thrombolysis Alone in Acute Myocardial Infarction (CAPITAL AMI Study)

Michel R. Le May, MD, FACC*, George A. Wells, PhD, Marino Labinaz, MD, FACC, Richard F. Davies, MD, FACC, Michele Turek, MD, Danielle Leddy, MD, Justin Maloney, MD, Tim McKibbin, MD, Brendan Quinn, MD, Rob S. Beanlands, MD, Chris Glover, MD, Jean-François Marquis, MD, Edward R. O’Brien, MD, FACC, William L. Williams, MD, FACC and Lyall A. Higginson, MD, FACC

Division of Cardiology, University of Ottawa, Ottawa, Ontario, Canada.

Manuscript received December 8, 2004; revised manuscript received April 3, 2005, accepted April 13, 2005.

* Reprint requests and correspondence: Dr. Michel R. Le May, Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario, Canada K1Y 4W7. (Email: mlemay{at}ottawaheart.ca).

OBJECTIVES: We compared a strategy of tenecteplase (TNK)-facilitated angioplasty with one of TNK alone in patients presenting with high-risk ST-segment elevation myocardial infarction (STEMI).

BACKGROUND: Previous trials show that thrombolysis followed by immediate angioplasty for the treatment of STEMI does not improve ischemic outcomes compared with thrombolysis alone and is associated with excessive bleeding complications. Since the publication of these trials, however, significant pharmacological and technological advances have occurred.

METHODS: We randomized 170 patients with high-risk STEMI to treatment with TNK alone (84 patients) or TNK-facilitated angioplasty (86 patients). The primary end point was a composite of death, reinfarction, recurrent unstable ischemia, or stroke at six months.

RESULTS: At six months, the incidence of the primary end point was 24.4% in the TNK-alone group versus 11.6% in the TNK-facilitated angioplasty group (p = 0.04). This difference was driven by a reduction in the rate of recurrent unstable ischemia (20.7% vs. 8.1%, p = 0.03). There was a trend toward a lower reinfarction rate with TNK-facilitated angioplasty (14.6% vs. 5.8%, p = 0.07). No significant differences were observed in the rates of death or stroke. Major bleeding was observed in 7.1% of the TNK-alone group and in 8.1% of the TNK-facilitated angioplasty group (p = 1.00).

CONCLUSIONS: In patients presenting with high-risk STEMI, TNK plus immediate angioplasty reduced the risk of recurrent ischemic events compared with TNK alone and was not associated with an increase in major bleeding complications.

Abbreviations and Acronyms
  ACT = activated clotting time
  ASSENT = Assessment of the Safety and Efficacy of a New Thrombolytic Agent
  CABG = coronary artery bypass graft surgery
  IRA = infarct-related artery
  PCI = percutaneous coronary intervention
  STEMI = ST-segment elevation myocardial infarction
  TIMI = Thrombolysis In Myocardial Infarction
  TNK = tenecteplase




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