ISSN 0975-3583
 

Journal of Cardiovascular Disease Research



    Comparison of QRS Duration Among Right Ventricular Pacing Sites-An Observational Study


    Bashir Ahmad Mir, Irshad Ahmad Wani, Nishat I Iram, Abhishek Gupta, Rukmini Jaiswal, Mohd Aleem Ansari
    JCDR. 2023: 3573-3580

    Abstract

    Chronic right ventricular apical pacing (RVAP) has been associated with detrimental clinical and hemodynamic outcomes. Theoretically, mid-septum pacing site has been proposed as a more physiological site compared to conventional apical pacing site. Aim: The present study was designed to assess whether right ventricular (RV) mid-septal pacing could be more favorable compared to the standard RVAP in correlation with pQRSd (paced QRS duration). Methods: A prospective observational study was conducted at a tertiary care cenre in India between May 2013 and February2015.Total122 patients were enrolled in the study. Of which 102 consecutive patients who underwent pacemaker implantation at mid-septum and apex were compared. Based on pQRSd, patients were dived into two groups. Group I include 73 patients having pQRSd ≤150 msec. Group I was further divided into group Ia (pQRSd ≤ 120 msec) and group Ib (pQRSd= 120-150 msec) including 5 and 68 patients, respectively and group II (pQRSd ≥ 150 msec) comprised 29 patients. Baseline clinical characteristics of all the patients according to pQRSd and pacing site were recorded. pQRSd was calculated using electrocardiogram (ECG). Results: Mean age was 64.63±8.89 years with male (60.8%) preponderance. Pacemaker was implanted in 102 patients of which, 51 patients were implanted at mid-septum and 51 patients at the apex. Mean pQRSd(<0.001) at apex (147.53±9.81 msec) was significantly higher compared to mid-septum (136.88±11.89 msec). Baseline QRS duration was the independent predictor of pQRSd≤120 msec.

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    Volume & Issue

    Volume 14 Issue 1

    Keywords