The effect of body mass index on complications in cardiac implantable electronic device surgery

Background Cardiac implantable electronic device (CIED) procedures are prone to complications. In our study, we investigated the effect of body mass index (BMI) on CIED-related complications.Methods1676 patients who had undergone CIED surgery (de novo implantation, system upgrade, generator change, pocket revision or lead replacement) at two heart centers in Turkey and met the study criteria were included in our study. For analysis of primary and secondary endpoints, patients were classified as non-obese (BMI < 25 kg/m(2)), overweight (25 <= BMI < 30 kg/m(2)), and obese (BMI >= 30 kg/m(2)). The primary endpoint was accepted as cumulative events, including the composite of clinically significant hematoma (CSH), pericardial effusion or tamponade, pneumothorax, and infection related to the device system. Secondary outcomes included each component of cumulative events.Results The rate of cumulative events, defined as primary outcome, was higher in the obese patient group, and we found a significant difference between the groups (3.0%, 4.3%, 8.9%, p = .001). CSH and pneumothorax rates were significantly higher in the obese patient group (0.3%, 0.9%, 1.9%, p = .04; 1.0%, 1.4%, 3.3%, p = .04, respectively). According to our multivariate model analysis; gender (OR:1.882, 95%CI:1.156-3.064, p = .01), hypertension (OR:4.768, 95%CI:2.470-9.204, p < .001), BMI (OR:1.069, 95%CI:1.012-1.129, p = .01) were independent predictors of cumulative events rates.Conclusions Periprocedural complications associated with CIED (especially hematoma and pneumothorax) are more common in the group with high BMI.