Resumo

CHANGO-AZANZA, Diego X. et al. Left ventricular dyssynchrony as result of right ventricular permanent apical pacing. Arch. Cardiol. Méx. [online]. 2020, vol.90, n.3, pp.328-335.  Epub 23-Out-2020. ISSN 1665-1731.  https://doi.org/10.24875/acm.20000003.

Permanent apical pacing of right ventricle (RV) can produce dyssynchrony of the left ventricle (LV) from an electrical and mechanical point of view. This phenomenon is caused by an alteration in the normal activation of LV leading to a deterioration of systolic function and the appearance of heart failure and its associated deleterious effects. For the study of the electrical asynchrony of the LV, a new noninvasive electrocardiographic system Synchromax has recently been proposed, being able to quantify the degree of electrical asynchrony that leads to a subsequent mechanical dyssynchrony. The latter has been traditionally studied by two-dimensional transthoracic echocardiography (2DTTE) through tissue Doppler and myocardial deformation and lately by real-time 3-dimensional echocardiography (RT3DE). The relationship between these phenomena has been the subject of study to predict those patients who benefit from an “upgrade” to cardiac resynchronization therapy.

Palavras-chave : Left ventricular dyssynchrony; Permanent apical pacing; Cardiac resynchronization therapy.

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