Prevention of reentrant tachycardia by single beat or repetitive stimulation.

Abstract:

:Eleven patients with an atrioventricular accessory pathway were studied by programmed electrical stimulation to determine if reentrant tachycardia could be prevented by delivery of either a single atrial extrastimulus, applied at a critical time after the tachycardia-initiating stimulus (or stimuli), or a train of stimuli. In all 11 patients, reentrant tachycardia was reproducibly induced from the high right atrium with a single premature beat, and in all patients initiation of tachycardia was prevented from the same site by a second premature beat. This second extrastimulus was effective if delivered within a zone which began 10 ms outside the effective refractory period of the tachycardia-initiating stimulus and averaged 61 ms in width. This was termed the 'preventive zone'. In 7 patients the effect of train stimulation to the high right atrium was studied. In all 7, the results were concordant with those obtained by single-beat stimulation. Any train which achieved single atrial capture within the preventive zone was effective in preventing tachycardia. Prevention was always possible with a single atrial extrastimulus or with single-capture train stimulation, whereas termination of an ongoing tachycardia required at least 2 atrial extrastimuli, or stimulation from the right ventricle.

journal_name

Eur Heart J

journal_title

European heart journal

authors

Kuck KH,Kunze KP,Schlüter M,Bleifeld W

doi

10.1093/oxfordjournals.eurheartj.a061756

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

67-74

issue

1

eissn

0195-668X

issn

1522-9645

journal_volume

6

pub_type

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