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(Circulation. 1968;37:70.)
© 1968 American Heart Association, Inc.

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Atrial Fibrillation Produced by Atrial Stimulation

JACOB I. HAFT M.D.¹; SUN H. LAU M.D.¹; EMANUEL STEIN M.D.¹; BERNARD D. KOSOWSKY M.D.¹; ANTHONY N. DAMATO M.D.¹

¹ From the Cardiopulmonary Laboratory, U. S. Public Health Service Hospital, Staten Island, New York.

Twenty-six episodes of atrial fibrillation and flutter-fibrillation, each lasting less than 23 sec, were recorded in three normal subjects during atrial pacing studies. The cause of these atrial arrhythmias was determined to be the result of stimulation within the atrial vulnerable period.

Key Words: Atrial vulnerable period • Single and paired pacing • Hazards of atrial pacing

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