This study is to analyse the demographics and microbiological factors concerning patients undergoing cardio surgical intervention using CPB complicated with bloodstream infection (BSI) postoperatively.

Infectious complications after cardiovascular surgery, especially in operations that use cardiopulmonary bypass (CPB), is associated with significant morbidity and increase in peri-operative mortality. Prolonged CPB usage could be predictive for early bloodstream infection following cardia surgery. This study is to analyse the demographics and microbiological factors concerning patients undergoing cardio surgical intervention using CPB complicated with bloodstream infection (BSI) postoperatively.

Inclusion Criteria:

• adult patients undergoing cardiac surgery

Exclusion Criteria:

• patients having active or previous endocarditis
• patients whose causative microorganism of postoperative BSI was identical to that isolated from preoperative or intraoperative samples
• patients with common skin colonized microorganisms, such as coagulase-negative Staphylococci, Viridans group Streptococci, Corynebacterium species, Bacillus species, Propionibacterium species, and Aerococcus species or Micrococcus species, which were isolated from only a single blood sample and without evidence of clinical sepsis, because contamination was considered.

Patients having suffered from sepsis after cardiac surgery in a period between 2009 and 2019 will be evaluated.