Background The outcome after myocardial infarction may be influencedby the type of physician providing ambulatory care.
Methods We studied 35,520 patients 65 years of age or olderwho were hospitalized for myocardial infarction in seven statesduring 1994 and 1995 and who survived for at least three monthsafter discharge. From Medicare claims, we identified ambulatoryvisits to cardiologists, internists, and family practitioners.Using propensity scores to adjust for demographic, clinical,and hospital characteristics, we analyzed treatment and mortalityat two years among patients matched according to their estimatedpropensity to receive care from a cardiologist within threemonths after discharge.
Results As compared with patients who saw only an internistor a family practitioner in the three months after discharge,patients who saw a cardiologist were younger, were more likelyto be white, were more likely to be male, had fewer coexistingconditions, and were more likely to have undergone invasivecardiac procedures while hospitalized (P<0.01 for all comparisons).Patients who saw a cardiologist were more likely to undergocardiac procedures and rehabilitation after discharge. Patientswho saw a cardiologist had a lower two-year mortality rate thanmatched patients who saw only an internist or a family practitioner(14.6 percent vs. 18.3 percent, P<0.001). Patients who sawboth a cardiologist and an internist or a family practitionerhad a lower mortality rate than matched patients who saw onlya cardiologist (11.1 percent vs. 12.1 percent, P=0.02).
Conclusions Ambulatory visits to cardiologists were associatedwith greater use of cardiac procedures and decreased mortalityafter myocardial infarction. Concurrent care by an internistor a family practitioner was associated with a further reductionin mortality.
Source Information
From the Department of Medicine, Division of General Medicine and Primary Care, Brigham and Women's Hospital and Harvard Medical School (J.Z.A.); and the Department of Health Care Policy, Harvard Medical School (J.Z.A., M.B.L., E.G., P.G.) all in Boston.
Address reprint requests to Dr. Ayanian at the Department of Health Care Policy, Harvard Medical School, 180 Longwood Ave., Boston, MA 02115, or at ayanian{at}hcp.med.harvard.edu.
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