Abstract

LANZA TARRICONE, Giuseppe; MAGO, Elys; SOGBE, Emir  and  MARTINEZ, María. Variación de voltaje de los complejos ventriculares en la fibrilación auricular y el ritmo sinusal. Gac Méd Caracas [online]. 2004, vol.112, n.1, pp.49-52. ISSN 0367-4762.

Background: the atrial fibrillation is characterized in the electrocardiogram by absence of wave P, presence of wave f and variation in the intervals R-R. This rhythm type affects the remodeling atrial, the prognosis in the attack of the miocardio. A map of the surface atrial demonstrates presence of fronts of waves that are perpetuated which affects the height of the voltage of the ventricular complexes in relation to the intervals R-R. Objectives: to register and to compare the differences of voltage of the complex R-R in the atrial fibrillation as in sinoatrial rhythm. Methods: 21 electrocardiograms were evaluated with atrial fibrillation and 23 with sinoatrial rhythm, registering the voltage of the waves R, the depth of the waves Q and the sum of R with Q. Results: Of the patients with sinoatrial rhythm 56.5 % was female and the age average was of 50.7 ± 21.2 years. Of the patients with atrial fibrillation 81,0 % was male and the age average was of 67.4 ±13.4 years. For wave R, as for wave Q and their additions in all the derivations, excepted derivation D2 of the wave R (P= 0.095), it was found statistically significant differences (P= 0.02 or less) among the electrocardiograms of sinoatrial rhythm and atrial fibrillation. Conclusions: a voltage difference exists among the registered complexes in the electrocardiogram between sinoatrial rhythm and atrial fibrillation.

Keywords : Electrocardiogram; Sinoatrial; rhythm; Atrial fibrillation; Voltage of the waves; Ventricular complex.; Interval R-R.