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ARTICLE |

Primary Angioplasty Compared With Thrombolytic Therapy for Acute Myocardial Infarction FREE

Salim Yusuf, FRCP, DPhil; Janice Pogue, MSc
[+] Author Affiliations

Corresponding author: Salim Yusuf, FRCP, DPhil, Hamilton General Hospital, 237 Barton St E,Hamilton, Ontario, Canada L8L 2×2(e-mail:yusufs@fhs.csu.mcmaster.ca).


JAMA. 1997;278(23):2110-2111. doi:10.1001/jama.1997.03550230086044
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In this issue of The Journal, Weaver and colleagues1 provide a careful quantitative review of the available data from randomized trials comparing primary percutaneous transluminal coronary angioplasty (PTCA) with thrombolytic therapy in patients with acute myocardial infarction. This analysis of 10 trials includes 2606 patients and reports a reduction in mortality (odds ratio, 0.66; 95% confidence interval [CI], 0.46-0.94), in the composite of mortality and reinfarction (odds ratio, 0.58; 95% CI, 0.44-0.76), and in stroke (odds ratio, 0.35; 95% CI, 0.14-0.77) with the use of PTCA. However, before the data from these analyses are considered persuasive enough to conclusively establish the superiority of primary PTCA over thrombolytic therapy, 3 key questions must be addressed.

See also p 2093.

First, are there potential biases that could have inflated the results of the individual trials or this meta-analysis? Several potential biases both within each trial and in the authors' metaanalysis should

REFERENCES

Weaver WD, Simes RJ, Betriu A, et al.  Comparison of primary coronary angioplasty and intravenous thrombolytic therapy for acute myocardial infarction: a quantitative review . JAMA . 1997;;278:2093-2098.
 The Global Use of Strategies to Open Occluded Coronary Arteries in Acute Coronary Syndromes GUSTO IIb Angioplasty Substudy Investigators. A clinical trial comparing primary coronary angioplasty with tissue plasminogen activator for acute myocardial infarction . N Engl J Med . 1997;;336:1621-1628.
Grines CL, Browne KF, Marco J, et al.  A comparison of immediate angioplasty with thrombolytic therapy for acute myocardial infarction . N Engl J Med . 1993;;328:673-679.
Michels KB, Yusuf S.  Does PTCA in acute myocardial infarction affect mortality and reinfarction rates? a quantitative overview (meta-analysis) of the randomized clinical trials . Circulation . 1995;;91:476-485.
Pogue J, Yusuf S. Overcoming the limitations of current meta-analysis of readomized controlled trials. Lancet. In press.
O'Neill W, Timmis GC, Bourdillon PD, et al.  A prospective randomized clinical trial of intracoronary streptokinase versus coronary angioplasty for acute myocardial infarction . N Engl J Med . 1986;;314:812-818.
Gibbons RJ, Holmes DR, Reeder GS, et al.  Immediate angioplasty compared with the administration of a thrombolytic agent followed by conservative treatment for myocardial infarction . N Engl J Med . 1993;;328:685-691.
Every N, Parsons L, Hlatky M, et al.  A comparison of thrombolytic therapy with primary coronary angioplasty for acute myocardial infarction . N Engl J Med . 1996;;335:1253-1260.
Volpi A, Maggioni A, Franzosi MG, et al.  In-hospital prognosis of patients with acute myocardial infarction complicated by primary ventricular fibrillation . N Engl J Med . 1987;;317:257-261.
Fibrinolytic Therapy Trialists' Collaborative Group.  Indications for fibrinolytic therapy in suspected acute myocardial infarction: collaborative overview of early mortality and major morbidity results from all randomized trials of more than 1000 patients . Lancet . 1994;;343:311-322.
Macaya C, Serruys PW, Ruygrok P, et al.  Continued benefit of coronary stenting versus balloon angioplasty: one-year clinical follow-up of Benestent Trial: Benestent Study Group . J Am Coll Cardiol . 1996;;27:255-261.
The EPIC Investigators.  Use of a monoclonal antibody directed against the platelet glycoprotein IIb/IIIa receptor in high-risk coronary angioplasty . N Engl J Med . 1994;;330:956-961.

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Weaver WD, Simes RJ, Betriu A, et al.  Comparison of primary coronary angioplasty and intravenous thrombolytic therapy for acute myocardial infarction: a quantitative review . JAMA . 1997;;278:2093-2098.
 The Global Use of Strategies to Open Occluded Coronary Arteries in Acute Coronary Syndromes GUSTO IIb Angioplasty Substudy Investigators. A clinical trial comparing primary coronary angioplasty with tissue plasminogen activator for acute myocardial infarction . N Engl J Med . 1997;;336:1621-1628.
Grines CL, Browne KF, Marco J, et al.  A comparison of immediate angioplasty with thrombolytic therapy for acute myocardial infarction . N Engl J Med . 1993;;328:673-679.
Michels KB, Yusuf S.  Does PTCA in acute myocardial infarction affect mortality and reinfarction rates? a quantitative overview (meta-analysis) of the randomized clinical trials . Circulation . 1995;;91:476-485.
Pogue J, Yusuf S. Overcoming the limitations of current meta-analysis of readomized controlled trials. Lancet. In press.
O'Neill W, Timmis GC, Bourdillon PD, et al.  A prospective randomized clinical trial of intracoronary streptokinase versus coronary angioplasty for acute myocardial infarction . N Engl J Med . 1986;;314:812-818.
Gibbons RJ, Holmes DR, Reeder GS, et al.  Immediate angioplasty compared with the administration of a thrombolytic agent followed by conservative treatment for myocardial infarction . N Engl J Med . 1993;;328:685-691.
Every N, Parsons L, Hlatky M, et al.  A comparison of thrombolytic therapy with primary coronary angioplasty for acute myocardial infarction . N Engl J Med . 1996;;335:1253-1260.
Volpi A, Maggioni A, Franzosi MG, et al.  In-hospital prognosis of patients with acute myocardial infarction complicated by primary ventricular fibrillation . N Engl J Med . 1987;;317:257-261.
Fibrinolytic Therapy Trialists' Collaborative Group.  Indications for fibrinolytic therapy in suspected acute myocardial infarction: collaborative overview of early mortality and major morbidity results from all randomized trials of more than 1000 patients . Lancet . 1994;;343:311-322.
Macaya C, Serruys PW, Ruygrok P, et al.  Continued benefit of coronary stenting versus balloon angioplasty: one-year clinical follow-up of Benestent Trial: Benestent Study Group . J Am Coll Cardiol . 1996;;27:255-261.
The EPIC Investigators.  Use of a monoclonal antibody directed against the platelet glycoprotein IIb/IIIa receptor in high-risk coronary angioplasty . N Engl J Med . 1994;;330:956-961.
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