Transient entrainment of tachycardias.
نویسنده
چکیده
A bout 15 years ago, Waldo and associates' first described that a tachycardia could be transiently accelerated to a faster rate by overdrive pacing without fundamentally altering the underlying tachycardia, a phenomenon they called transient entrainment. That first description of transient entrainment applied to atrial flutter but was soon extended to ectopic atrial tachycardias,2 atrioventricular reentrant tachycardia,3 and ventricular tachycardia.4 Three basic criteria of transient entrainment were recognized: 1)
منابع مشابه
Transient entrainment of bundle-branch reentry by atrial and ventricular stimulation: elucidation of the tachycardia mechanism through analysis of the surface ECG.
BACKGROUND Different responses to entrainment have been reported in relation to the pacing site of a variety of tachycardias. However, transient entrainment of bundle-branch reentrant tachycardia (BBRT) has not been investigated systematically. METHODS AND RESULTS We attempted entrainment of 13 BBRTs in 9 patients by pacing first the right ventricle and then the right atrium. The initial paci...
متن کاملEntrainment of ventricular tachycardia: explanation for surface electrocardiographic phenomena by analysis of electrograms recorded within the tachycardia circuit.
Transient entrainment was demonstrated during 59 pacing events in 18 episodes of sustained uniform ventricular tachycardia (VT) while recording electrograms from the site of origin of tachycardia (LE-SOO). During entrainment, the morphology of the initial component of the LE-SOO was identical to the morphology observed during the tachycardia in 13 VTs (group I), but in five VTs (group II), the ...
متن کاملVentricular fusion during resetting and entrainment of orthodromic supraventricular tachycardia involving septal accessory pathways. Implications for the differential diagnosis with atrioventricular nodal reentry.
BACKGROUND Ventricular fusion during transient entrainment of orthodromic atrioventricular reciprocating tachycardias (OAVRT) was originally found to be absent and recently observed only with left ventricular stimulation. However, previous studies were restricted to cases with a left free wall accessory pathway. The hypothesis of the present study was that fusion is likely during resetting and ...
متن کاملVentricular Fusion During Resetting and Entrainment of Orthodromic Supraventricular Tachycardia Involving Septal Accessory Pathways
Background. Ventricular fusion during transient entrainment of orthodromic atrioventricular reciprocating tachycardias (OAVRT) was originally found to be absent and recently observed only with left ventricular stimulation. However, previous studies were restricted to cases with a left free wall accessory pathway. The hypothesis of the present study was that fusion is likely during resetting and...
متن کاملUnexpectedly short postpacing interval in a left free wall accessory pathway mediated tachycardia: A pitfall of the corrected postpacing interval algorithm?
One of the maneuvers that help in the differential diagnosis of supraventricular tachycardias is the analysis of the response to transient entrainment or resetting of the tachycardia by right ventricular pacing. The basis of the analysis is the subtraction of the tachycardia cycle length (TCL) from the postpacing interval (PPI) measured at the pacing site, so called “PPI-TCL”, as first describe...
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عنوان ژورنال:
- Circulation
دوره 87 4 شماره
صفحات -
تاریخ انتشار 1993