The distribution of the PLS
A total of 69 PLS were found in 31 patients. The distribution of the PLS was shown in Figure 3. 23 (33%) and 22 (32%) of the 69 PLS were found around PV antrum and left atrial appendage (LAA) base, respectively. Subsequently, 9 (13%), 6 (9%), 5 (7%), 4 (6%) of the 69 PLS were found around the left atrial septum, left atrial posterior wall, left atrial roof and left atrial bottom, respectively.