Document Classification

Section Type: RESULTS

Text: At 12 months, the mean left ventricular ejection fraction was significantly lower in the right-ventricular-pacing group than in the biventricular-pacing group (54. 8 + / -9. 1 % vs. 62. 2 + / -7. 0 %, P < 0. 001), with an absolute difference of 7. 4 percentage points, whereas the left ventricular end-systolic volume was significantly higher in the right-ventricular-pacing group than in the biventricular-pacing group (35. 7 + / -16. 3 ml vs. 27. 6 + / -10. 4 ml, P < 0. 001), with a relative difference between the groups in the change from baseline of 25 % (P < 0. 001).