A. Castellanos et al., DYNAMICS OF, AND ALTERNATING WENCKEBACH PERIODS DURING, 4 1 AND 6/1 ATRIOVENTRICULAR-BLOCK/, The American journal of cardiology, 76(7), 1995, pp. 523
The dynamics of progression of 4:1 atrioventricular (AV) block have no
t been studied. Atrial flutter appeared to be a good model for this pu
rpose because potential clinical problems that could arise when high d
egrees (>4:1) of AV block occur during sinus rhythm are less likely to
be encountered.