Alternative sites for right ventricular pacing in Chagas disease: a comparative study of the mid-septum and inflow tract.

Background: The right ventricular mid-septum and inflow tract are alternative pacing sites that are potentially less harmful to cardiac function.

Objective: This study aimed to analyze the influence of these two alternative pacing sites on the clinical course of patients with chronic Chagas disease, who underwent definitive pacemaker implantation.

Methods: A total of 80 patients with Chagas disease and classical indications for definitive pacemaker implantation were randomized into two groups between October 2008 and August 2010: 40 received inflow tract implantation and 40 patients received mid-septum implantation.

One-year cardiac morphological and functional evolution following permanent pacemaker implantation in right ventricular septal position in chagasic patients.

Introduction: The septal position is an alternative site for cardiac pacing (CP) that is potentially less harmful to cardiac function.

Methods: Patients with Chagas disease without heart failure submitted to permanent pacemaker (PP) implantation at the Clinics Hospital of the Triângulo Mineiro Federal University (UFTM), were selected from February 2009 to February 2010. The parameters analyzed were ventricular remodeling, the degree of electromechanical dyssynchrony (DEM), exercise time and VO2 max during exercise testing (ET) and functional class (NYHA).

Alternative endocardial sites for artificial cardiac stimulation.

The conventional right ventricular stimulation can be associated with deleterious effects on cardiac function. The need for a more physiological artificial cardiac stimulation is undoubtedly one of the most important points in the area of cardiac electrotherapy. The programming algorithms for the maintenance of adequate atrioventricular conduction, the stimulation of alternative endocardial sites and the cardiac resynchronization therapy are used with the objective of attaining these goals.