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Media Gallery

Schematics show the 3 types of action potentials in the right ventricle: endocardial (End), mid myocardial (M), and epicardial (Epi). A, Normal situation on V2 ECG generated by transmural voltage gradients during the depolarization and repolarization phases of the action potential. B-E, Different alterations of the epicardial action potential that produce the ECG changes observed in patients with Brugada syndrome. Adapted from Antzelevitch, 2005.
Three types of ST-segment elevation in Brugada syndrome, as shown in the precordial leads on ECG in the same patient at different times. Left panel shows a type 1 ECG pattern with pronounced elevation of the J point (arrow), a coved-type ST segment, and an inverted T wave in V1 and V2. The middle panel illustrates a type 2 pattern with a saddleback ST-segment elevated by >1 mm. The right panel shows a type 3 pattern in which the ST segment is elevated < 1 mm. According to a consensus report (Antzelevitch, 2005), the type 1 ECG pattern is diagnostic of Brugada syndrome. Modified from Wilde, 2002. Image courtesy of Richard Nunez, MD, and EMedHome.com (http://www.emedhome.com/).

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Author

Jose M Dizon, MD Professor of Clinical Medicine, Clinical Electrophysiology Laboratory, Division of Cardiology, Columbia University College of Physicians and Surgeons; Attending Physician, Department of Medicine, New York-Presbyterian/Columbia University Medical Center

Jose M Dizon, MD is a member of the following medical societies: American College of Cardiology, Heart Rhythm Society

Disclosure: Nothing to disclose.

Coauthor(s)

Tamim M Nazif, MD Fellow, Division of Cardiology, Columbia University College of Physicians and Surgeons

Tamim M Nazif, MD is a member of the following medical societies: American College of Cardiology

Disclosure: Nothing to disclose.

Specialty Editor Board

Francisco Talavera, PharmD, PhD Adjunct Assistant Professor, University of Nebraska Medical Center College of Pharmacy; Editor-in-Chief, Medscape Drug Reference

Disclosure: Received salary from Medscape for employment. for: Medscape.

Ronald J Oudiz, MD, FACP, FACC, FCCP Professor of Medicine, University of California, Los Angeles, David Geffen School of Medicine; Director, Liu Center for Pulmonary Hypertension, Division of Cardiology, LA Biomedical Research Institute at Harbor-UCLA Medical Center

Ronald J Oudiz, MD, FACP, FACC, FCCP is a member of the following medical societies: American College of Cardiology, American College of Chest Physicians, American College of Physicians, American Heart Association, American Thoracic Society

Disclosure: Serve(d) as a speaker or a member of a speakers bureau for: Actelion, Bayer, Gilead, United Therapeutics<br/>Received research grant from: Actelion, Arena, Gilead, GSK, Liquidia, Reata, United Therapeutics<br/>Received income in an amount equal to or greater than $250 from: Actelion, Complexa, Gilead, Medtronic, Reata, United Therapeutics.

Chief Editor

Mikhael F El-Chami, MD Associate Professor, Department of Medicine, Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine

Mikhael F El-Chami, MD is a member of the following medical societies: Alpha Omega Alpha, American College of Cardiology, American Heart Association, Heart Rhythm Society

Disclosure: Serve(d) as a director, officer, partner, employee, advisor, consultant or trustee for: Medtronic; Boston Scientific, Biotronik<br/>Received research grants (as part of Multicenter studies) from Medtronic and Boston Scientific.

Additional Contributors

Justin D Pearlman, MD, ME, PhD, FACC, MA Chief, Division of Cardiology, Director of Cardiology Consultative Service, Director of Cardiology Clinic Service, Director of Cardiology Non-Invasive Laboratory, Chair of Institutional Review Board, University of California, Los Angeles, David Geffen School of Medicine

Justin D Pearlman, MD, ME, PhD, FACC, MA is a member of the following medical societies: American College of Cardiology, International Society for Magnetic Resonance in Medicine, American College of Physicians, American Federation for Medical Research, Radiological Society of North America

Disclosure: Nothing to disclose.

Characteristic	Type 1	Type 2	Type 3
J wave amplitude	≥2 mm	≥2 mm	≥2 mm
T wave	Negative	Positive or biphasic	Positive
ST-T configuration	Cove-type	Saddleback	Saddleback
ST segment, terminal portion	Gradually descending	Elevated by ≥1 mm	Elevated by < 1 mm

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