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Grouped Beats: What's the Mechanism?

Authors


Address for reprints: Adrian Baranchuk, M.D., Associate Professor of Medicine and Physiology, Cardiac Electrophysiology and Pacing, Kingston General Hospital, Queen's University, Kingston, ON K7L 2V7, Canada. Fax: 613-548-1387; e-mail: barancha@kgh.kari.net

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