The results obtained in the VDD cardiac stimulation (dual chamber and biventricular) in a patient with diagnosis of dilated myocardiopathy, severe ventricular dysfunction (functional capacity III-IV of the NYHA) and left bundle branch block are evaluated.A transitory cardiac stimulation was carried out during 5 min in: right auricle (RA)-right hot wheels octo car wash ventricle (RV), RA-left ventricle (LV) and RA-both ventricles (biventricular) with the cathode in RV or LV.The permanent stimulation was suggested according to the results obtained with the previous one and RA-LV and biventricular stimulation (cathode in LV) was produced with different PR intervals.The ventricular function was evaluated in both protocols by nuclear ventriculography.The ejection fraction, the systolic, telesystolic and telediastolic volumes of the LV and the mitral angilina white regurgitation index (with permanent stimulation) were defined.
It is concluded that biventricular stimulation proved to be the most efficient option to improve ventricular dysfunction.