3.2 Study characteristics
Patients with AF occurrence (n=154) and patients without AF occurrence (n=392) post operation were named as AFACS and non-AFACS respectively. Most 7,16-19 of the studies were in the full text format, while only one 22 study was in the conference abstract. EAT measurement involved EAT volume and LA EAT volume, which were assessed by CT, as well as EAT thickness assessed by echocardiography. EAT thickness was defined as an echo-free region between the right ventricular outer wall and the visceral pericardium. Other patient demographics and basic characteristics are described in Table 1.