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Media Gallery

Normal radionuclide uptake (dipyridamole-Cardiolite).
ECGs show a normal sinus rhythm and a sinus rhythm with a left bundle branch block.
ECG depicts electrophysiologic events of left bundle branch block.

of 3

Author

David Akinpelu, MD, FACP Emergency Medicine Attending Physician, Riverside Tappahannock Hospital/Riverside Shore Memorial Hospital, Riverside Medical Group

David Akinpelu, MD, FACP is a member of the following medical societies: American College of Physicians-American Society of Internal Medicine, American Medical Association

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

Eric H Yang, MD Associate Professor of Medicine, Director of Cardiac Catherization Laboratory and Interventional Cardiology, Mayo Clinic ArizonA

Eric H Yang, MD is a member of the following medical societies: Alpha Omega Alpha

Disclosure: Nothing to disclose.

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.

Acknowledgements

Javier M Gonzalez, MD Consulting Staff, Department of Cardiology, Citrus Cardiology Consultants

Javier M Gonzalez, MD is a member of the following medical societies: American College of Cardiology and American Medical Association

Disclosure: Nothing to disclose.

Results	Rest	Stress	Conclusion
Findings	Normal	Normal	Blood flow to coronary artery is likely normal
Findings	Normal	Reversible perfusion defect	Artery blockage may be present
Findings	Abnormal	Abnormal	Heart has had prior injury, eg, previous heart attack

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