Comparison of modified MAZE with minimally invasive monopolar ablation and traditional bipolar radiofrequency ablation in the treatment of atrial fibrillation

Table 4 Echocardiographic and ECG data between the two groups 3, 6, and 12 months after operation

	mi-MAZE(n = 40)	os-MAZE(n = 62)	P value
3 months after operation
sinus rhythm, n (%)	31(77.5)	44(71.0)	0.465^a
cardiac ultrasonography, mean ± SD
LAD(mm)	41.5 ± 7.39	44.4 ± 5.84	0.069^b
LVDs(mm)	33.4 ± 5.14	31.7 ± 3.78	0.170^b
LVDd(mm)	48.0 ± 3.49	46.2 ± 4.43	0.055^c
LVEF(%)	60.1 ± 6.16	62.7 ± 5.52	0.293^b
SF-36, mean ± SD	120.2 ± 8.10	110.6 ± 6.58	0.000^b
6 months after operation
sinus rhythm, n (%)	30(75.0)	42(67.7)	0.266^a
cardiac ultrasonography, mean ± SD
LAD(mm)	40.1 ± 3.89	44.4 ± 4.95	0.001^b
LVDs(mm)	33.8 ± 3.46	30.8 ± 3.72	0.010^b
LVDd(mm)	48.6 ± 3.46	49.4 ± 3.56	0.318^c
LVEF(%)	61.6 ± 4.03	62.8 ± 4.22	0.182^c
SF-36, mean ± SD	121.4 ± 7.58	113.2 ± 5.36	0.000^b
12 months after operation
sinus rhythm, n (%)	31(77.5)	42(67.7)	0.164^a
cardiac ultrasonography, mean ± SD
LAD(mm)	41.9 ± 5.35	44.8 ± 4.67	0.070^b
LVDs(mm)	32.1 ± 3.57	30.6 ± 2.98	0.182^b
LVDd(mm)	49.1 ± 3.38	50.1 ± 3.03	0.129^c
LVEF(%)	64.2 ± 5.53	63.3 ± 4.29	0.347^c
SF-36, mean ± SD	123.5 ± 6.09	119.3 ± 6.25	0.028^b

Abbreviations LAD Left atrial diameter, LVDd Left ventricular diastolic diameter, LVDs Left ventricular systolic diameter, LVEF Left ventricular ejection fraction, SF-36 Short form 36 questionnaire
^aPearson’s test
^bKolmogorov-Smirnov test
^cStudent T test

ISSN: 1749-8090