Atrial rhythms in response to an early atrial premature depolarization in man
1973; Elsevier BV; Volume: 85; Issue: 3 Linguagem: Inglês
10.1016/0002-8703(73)90366-9
ISSN1097-6744
AutoresKarlen L. Paulay, P.Jacob Varghese, Anthony N. Damato,
Tópico(s)Atrial Fibrillation Management and Outcomes
ResumoThe effect of an early atrial premature depolarization (APD) on spontaneous atrial rate was assessed in 16 patients in sinus rhythm. At close coupling intervals (range 27 to 48 per cent of the preceding sinus cycle), atrial acceleration was observed for several beats following the APD in 13 patients. On the basis of P wave configuration and the intra-atrial activation sequence, the accelerated beats appeared to originate from the sinus node. Furthermore, this "sinus" acceleration appeared regardless of the site at which the APD was introduced and was unrelated to latency or current strength. The findings are consistent with APD-induced sinus node re-entry, although sinus node pacemaker acceleration and shift is an alternative mechanism. Sinus node re-entry may explain certain instances of "interpolated" APD's and atrial tachyarrhythmias seen clinically.
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