3.3 Procedural outcomes
3.3.1Cardiopulmonary bypass time
Mean CPB time was 82.55 minutes with 95% CI of 79.89-85.21 minutes in the TVD group and 73.78 minutes with 95% CI of 72.26-75.31 minutes in the non-TVD group (p<0.001). 374 patients receiving TVD and 1030 patients receiving non-TVD procedures were assessed for this outcome and recruited from all 9 included studies.
In the meta-analysis, significant difference in CPB time was identified (MD=7.75, 95% CI=2.60-12.89, p=0.003) (Fig.2a ).
3.3.2Cross-clamp time
Mean cross-clamp time was 52.02 minutes with 95% CI of 50.02-54.02 minutes in the TVD group and 43.70 minutes with 95% CI of 42.66-44.74 minutes in the non-TVD group (p<0.001). 333 patients receiving TVD and 977 patients receiving non-TVD procedures were assessed for this outcome and recruited from 8 included studies.
In the meta-analysis, significant difference in cross-clamp time was identified (MD=7.77, 95% CI=4.76-10.78, p<0.001) (Fig.2b ).
3.3.3Postoperative atrioventricular block
The meta-analysis for postoperative atrioventricular block included 193 patients undergoing TVD and 479 patients undergoing non-TVD procedures from 4 studies, no significant difference in postoperative atrioventricular block was identified(OR=0.73, 95% CI=0.18-3.01, p=0.66) (Fig.2c ).
3.3.4