Correlation between double ventricular synchronous pacing and left ventricular systolic synchronicity after cardiac resynchronization therapy

AIM To appraise the correlation between double ventricular synchronous pacing and left ventricular systolic synchronicity after cardiac resynchronization therapy (CRT) in patients for 12 months. METHODSThere were 128 patients who underwent CRT from January 2012 to July 2014. Seventy eight patients with double ventricular synchronous pacing and 50 patients not satisfied by ECG were enrolled. The differences of Ts-SD and Te-SD in tissue velocity imaging were studied. RESULTSTs-SD ［(45±9) ms vs.(33±7) ms, P<0.05］ and Te-SD ［(41±8) ms vs.(31±8) ms, P<0.05］ improved over baseline in 78 patients with double ventricular synchronous pacing. ANOVA showed Ts-S, Te-SD, and LVESV were different (P<0.05). Multiple linear regression indicated double ventricular synchronous pacing was aligned with Ts-SD (B=-0.052, P=0.000), Te-SD (B=-0.032, P=0.032, and Pearson analysis showed negative correlation between double ventricular synchronous pacing with Ts-SD, r=-0.933, P=0.000). CONCLUSIONCRT with double ventricular synchronous pacing maybe effective in improving left ventricular systolic synchronicity.