Bacterial infection of pacemaker in patients with endocarditis

ABSTRACT

The advancement of technology in recent decades has been lead to use the electrophysiology cardiac devices. Although these devices are used increasingly, but the frequency of subclinical infection is unknown. We investigate bacterial infections due to implantable cardioverter defibrillator [ICDs] in patients with endocarditis. Population of the study was considered among all adult patients in whom the cardiac electrophysiology device was removed. Associated infection endocarditis defined by the Duke criteria. 35 pacemakers [PM] were aseptically removed from these patients during January 2012 to November 2014. Intraoperative swabs from the different part of devices were collected, cultured in BHI [Brain Heart Infusion Broth] and then bacterial classical cultures were done under aerobic and anaerobic conditions. Biochemical and differential media were used to detect the bacteria species. Data analysis was performed by using SPSS version 16 software. 13 cases of 35 patients with endocarditis diagnosed by modified Duke Criteria and removed pacemaker had positive culture. Of the 13 cases with infection 43% were identified as gram positive and 57% had gram negative bacteria. Based on our study and similar studies, bacteria can colonize in electrophysiology devices which can lead to bacterial infections