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(Circulation. 1963;27:682.)
© 1963 American Heart Association, Inc.

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An Implantable, Synchronous Pacemaker for the Long-Term Correction of Complete Heart Block

DAVID A. NATHAN M.D., F.A.C.P.¹; SOL CENTER M.D., F.A.C.S.¹; CHANG-YOU WU M.D.¹; WALTER KELLER M.S.¹

¹ From the Medical and Surgical Research Departments, Mount Sinai Hospital, Miami Beach, Florida, and Cordis Laboratory, Miami, Florida.

An implantable, synchronous cardiac pacemaker for long-term correction of complete heart block has been developed. It has been successfully used in dogs for periods up to eight months. The performance of the pacemaker during normal sinus rhythm and atrial arrhythmias is illustrated with electrocardiograms. After implantation of the pacemaker, the dogs have returned to completely normal activity and have tolerated all physical exercises well.

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