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James K Porterfield, MD

Assistant Professor of Medicine
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Johns Hopkins Medicine - GBMC

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Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

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Call +1-410-502-7683 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Assistant Professor of Medicine

Centers & Institutes

  • Heart and Vascular Institute


Angina, Arrhythmia, Atherosclerosis, Atrial Fibrillation, Atrial Flutter, Atrial Septal Defects, Cardiology, Cardiomyopathy, Cardiovascular Disease, Cardioversion, Chest Pain, Clinical Cardiology, Congenital Heart Disease - Adult, Congestive Heart Failure, Coronary Artery Disease, Dyslipidemia, Echocardiography, General Cardiology, Heart Disease, High Cholesterol, Hypertrophic Cardiomyopathy, Irregular Heartbeat, Palpitations, Stress Testing, Transesophogeal Echocardiography, Transthoracic Echocardiogram, Valvular Heart Disease


Dr. James Porterfield is a general cardiologist in the Johns Hopkins Heart and Vascular Institute of the Division of Medicine. He practices at Johns Hopkins Cardiology at the Greater Baltimore Medical Center (GBMC). Dr. Porterfield is also an assistant professor of medicine at the Johns Hopkins University School of Medicine.

Dr. Porterfield received his medical degree from the Medical College of Virginia, and completed his residency and a fellowship in cardiology at the Johns Hopkins University School of Medicine.


  • English
Additional Resources +
  • Education +


    • Medical College of Virginia School of Medicine (Richmond VA ) (1980)


    • Johns Hopkins University School of Medicine / Medicine (Baltimore MD ) (1983)


    • Johns Hopkins University School of Medicine / Cardiology (Baltimore MD ) (1988)


    • Cardiovascular Disease, American Board of Internal Medicine (1987)
    • Internal Medicine, American Board of Internal Medicine (1983)
  • Research & Publications +

    Selected Publications

    H. Kusuoka; J.K. Porterfield; H.F. Weisman; M.L. Weisfeldt; E. Marban. Pathophysiology and pathogenesis of stunned myocardium. Depressed Ca2+ activation of contraction as a consequence of reperfusion-induced cellular calcium overload in ferret hearts. Journal of Clinical Investigation. 1987;79(3):950-961.

    E. Marban; M. Kitakaze; H. Kusuoka; J.K. Porterfield; D.T. Yue; V.P. Chacko. Intracellular free calcium concentration measured with 19F NMR spectroscopy in intact ferret hearts. Proceedings of the National Academy of Sciences of the United States of America. 1987;84(16):6005-6009.

    J.A. Wagner; F.L. Sax; H.F. Weisman; J. Porterfield; C. McIntosh; M.L. Weisfeldt; S.H. Snyder; S.E. Epstein. Calcium-antagonist receptors in the atrial tissue of patients with hypertrophic cardiomyopathy. New England Journal of Medicine. 1989;320(12):755-761.

    J.K. Porterfield; R.E. Pyeritz; T.A. Traill. Brief clinical report: Pulmonary hypertension and interstitial fibrosis in von Recklinghausen neurofibromatosis. American Journal of Medical Genetics. 1986;25(3):531-535.

    R.H. Plack; J.K. Porterfield; J.A. Brinker. Complete heart block developing during aortic valvuloplasty. Chest. 1989;96(5):1201-1203.

    G.K. Lammert; D. Merine; R.I. White Jr.; E.K. Fishman; J.K. Porterfield. Embolotherapy of a high-flow false aneurysm by using an occlusion balloon, thrombin, steel coils, and a detachable balloon. American Journal of Roentgenology. 1989;152(2):382-384.

    M.E. McIvor; S.L. Kaufman; R. Satre; J.K. Porterfield; J.A. Brinker. Search and retrieval of a radiolucent foreign object. Catheterization and Cardiovascular Diagnosis. 1989;16(1):19-23.

    M.J. Lohse; H.F. Weisman; F.L. Sax; J.A. Wagner; J. Porterfield; C.L. McIntosh; M.L. Weisfeldt; S.H. Snyder; S.E. Epstein. Calcium-antagonist receptors in cardiomyopathy. New England Journal of Medicine. 1989;321(10):686-687.


  • Academic Affiliations & Courses +
  • Activities & Honors +


    Fellow (FACC), American College of Cardiology

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  • Contact & Locations +


    Johns Hopkins Medicine - GBMC
    6701 N. Charles Street
    Physicians Pavilion East
    Towson, MD 21204
    Phone: 443-849-8989
    Appointment Phone: 443-997-0270
    The Johns Hopkins Hospital
    600 N. Wolfe Street
    Sheikh Zayed Tower
    Baltimore, MD 21287
    Phone: 443-442-2000
    Appointment Phone: 443-997-0270
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