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      Temporal trends in the treatment of over 1.5 million patients with myocardial infarction in the U.S. from 1990 through 1999

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          Effects of tissue plasminogen activator and a comparison of early invasive and conservative strategies in unstable angina and non-Q-wave myocardial infarction. Results of the TIMI IIIB Trial. Thrombolysis in Myocardial Ischemia.

          Although coronary thrombosis plays a critical role in the pathogenesis of unstable angina and non-Q-wave myocardial infarction (NQMI), the effects of thrombolytic therapy in these disorders is not clear. Also, the role of routine early coronary arteriography followed by revascularization has not been established. Patients (n = 1473) seen within 24 hours of ischemic chest discomfort at rest, considered to represent unstable angina or NQMI, were randomized using a 2 x 2 factorial design to compare (1) TPA versus placebo as initial therapy and (2) an early invasive strategy (early coronary arteriography followed by revascularization when the anatomy was suitable) versus an early conservative strategy (coronary arteriography followed by revascularization if initial medical therapy failed). All patients were treated with bed rest, anti-ischemic medications, aspirin, and heparin. The primary end point for the TPA-placebo comparison (death, myocardial infarction, or failure of initial therapy at 6 weeks) occurred in 54.2% of the TPA-treated patients and 55.5% of the placebo-treated patients (P = NS). Fatal and nonfatal myocardial infarction after randomization (reinfarction in NQMI patients) occurred more frequently in TPA-treated patients (7.4%) than in placebo-treated patients (4.9%, P = .04, Kaplan-Meier estimate). Four intracranial hemorrhages occurred in the TPA-treated group versus none in the placebo-treated group (P = .06). The end point for the comparison of the two strategies (death, myocardial infarction, or an unsatisfactory symptom-limited exercise stress test at 6 weeks) occurred in 18.1% of patients assigned to the early conservative strategy and 16.2% of patients assigned to the early invasive strategy (P = NS). In the latter, the average length of initial hospitalization, incidence of rehospitalization within 6 weeks, and days of rehospitalization all were significantly lower. In the overall trial, patients with unstable angina and NQMI were managed with low rates of mortality (2.4%) and myocardial infarction or reinfarction (6.3%) at the time of the 6-week visit. These results can be achieved using either an early conservative or early invasive strategy, the latter resulting in a reduced incidence of days of hospitalization and of rehospitalization and in the use of antianginal drugs. The addition of a thrombolytic agent is not beneficial and may be harmful.
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            Indications for ACE Inhibitors in the Early Treatment of Acute Myocardial Infarction : Systematic Overview of Individual Data From 100 000 Patients in Randomized Trials

            (1998)
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              Critical pathways as a strategy for improving care: problems and potential.

              In an era of increasing competition in medical care, critical pathway guidelines have emerged as one of the most popular new initiatives intended to reduce costs while maintaining or even improving the quality of care. Developed primarily for high-volume hospital diagnoses, critical pathways display goals for patients and provide the corresponding ideal sequence and timing of staff actions for achieving those goals with optimal efficiency. Despite the rapid dissemination of critical pathway programs in hospitals throughout the United States, many uncertainties remain about their development, implementation, and evaluation. In addition, serious concerns have been raised about their effect on patient outcomes and satisfaction with care, physician autonomy, malpractice risks, and the teaching and research missions of many hospitals. Underlying these concerns is the absence of data from controlled trials to evaluate the effects of critical pathways. Physicians should understand the potential benefits and problems associated with critical pathways because physicians are increasingly being asked to provide leadership for pathway programs. Physicians and other health service investigators should also develop methods to study pathways in evolving health care settings. Although the promise of reduced costs and improved quality is enticing, the gaps in our knowledge about critical pathways are extensive; therefore, like any new health care technology, pathway programs should be fully evaluated in order to understand the conditions under which that promise may be fulfilled.
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                Author and article information

                Journal
                Journal of the American College of Cardiology
                Journal of the American College of Cardiology
                Elsevier BV
                07351097
                December 2000
                December 2000
                : 36
                : 7
                : 2056-2063
                Article
                10.1016/S0735-1097(00)00996-7
                8ccbe36a-24fc-4e33-a2ec-c2936b8b1945
                © 2000

                http://www.elsevier.com/tdm/userlicense/1.0/

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