James K Porterfield, M.D.

Headshot of James K Porterfield
  • Assistant Professor of Medicine


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

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Outside of Maryland & Washington D.C.

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Johns Hopkins Heart and Vascular Institute - GBMC

Appointment Phone: 443-997-0270
6569 North Charles Street
Physicians Pavilion West, Suite 600
Towson, MD 21204 map
Phone: 443-849-8989


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 West Virginia University School of Medicine, and completed his residency and a fellowship in cardiology at the Johns Hopkins University School of Medicine.

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  • Assistant Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD; Medicine; West Virginia University School of Medicine (1980)


  • Medicine; Johns Hopkins University School of Medicine (1983)


  • Cardiology; Johns Hopkins University School of Medicine (1988)

Board Certifications

  • American Board of Internal Medicine (Cardiovascular Disease) (1987)
  • American Board of Internal Medicine (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.


Activities & Honors


  • Fellow, American College of Cardiology

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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