Atypical right atrial flutter patterns

Article; Proceedings Paper

关键词: CRISTA TERMINALIS;    CATHETER ABLATION;    INTRACARDIAC ECHOCARDIOGRAPHY;    CONDUCTION;    ENTRAINMENT;    ISTHMUS;    BLOCK;    ACTIVATION;    REENTRY;    CIRCUIT;   

DOI  :  10.1161/01.CIR.103.25.3092

来源: SCIE

【 摘 要 】

Background-The purpose of our study was to define the incidence and mechanisms of atypical right atrial flutter, Methods and Results-A total of 28 (8%) of 372 consecutive patients with atrial flutter (AFL) had 36 episodes of sustained atypical right AFL, Among 24 (67%) of 36 episodes of lower loop reentry (LLR), 13 (54%) of 24 episodes had early breakthrough at the lower lateral tricuspid annulus, whereas 11 (46%) of 24 episodes had early breakthrough at the high lateral tricuspid annulus, and 9 (38%) of 24 episodes showed multiple annular breaks. Bidirectional isthmus block resulted in elimination of LLR, A pattern of posterior breakthrough from the eustachian ridge to the septum was observed in 4 (14%) of 28 patients. Upper loop reentry was observed in 8 (22%) of 36 episodes and was defined as showing a clockwise orientation with early annular break and wave front collision over the isthmus, Two patients had atypical right AFL around low voltage areas (scars) in the posterolateral right atrium. Conclusions-Atypical right AFL is most commonly associated with an isthmus-dependent mechanism (ie, LLR or subeustachian isthmus breaks). Non-isthmus-dependent circuits include upper loop reentry or scar-related circuits.

【 授权许可】

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