Unfractionated heparin was used for anticoagulation, with an aPTT monitoring goal set between 45 and 80 s; see Table 1. Bleeding (pooled rate 43%; 95% CI 28.4; 59.5) and any kind of thrombosis (pooled 36%; 95% CI 21.7; 53.7) were the complications most often reported. Within ...