Analysis of the thickness characteristics of the left atrial posterior wall and its correlation with the low and no voltage areas of the left atrial posterior wall in patients with atrial fibrillation

Table 2 Comparison of upper, middle and lower mean levels of left posterior atrial wall thickness

Indicators	Level	X²	P	Top vs. Bottom	Top vs.	Lower vs. Middle
Upper mean value (mm)	1.41 (1.3, 1.575)	11.031	0.004	0.009	0.518	0.069
Lower mean value (mm)	1.47 (1.33, 1.635)
Mean value across the middle (mm)	1.45 (1.23, 1.595)

ISSN: 1749-8090