Evaluation of Left Atrial Function in Patients with Paroxysmal Atrial Fibrillation Using Left Atrial Automatic Myocardial Functional Imaging Ultrasonography

Table 2

Comparison of left atrial volume and strain parameters between NVPAF group and normal control group.

LA function	NVPAF	Control	Z/t
LAVmin	44 (22.5∼62)	19 (14∼27.5)	−5.895	0.000
LAVmax	64.5 (45∼86)	42 (34∼56.75)	−4.506	0.000
LAVpreA	50.5 (34∼71)	34 (23.25∼45)	−4.617	0.000
LAEV	20 (15∼26.75)	23 (18∼29)	−2.052	0.057
LAEF	35 ± 14.84	55.5 (51∼60.75)	−6.924	0.000
S_R	11 (6∼18.75)	21 (17∼26.75)	−5.300	0.000
S_CD	−8 (−12∼−3.25)	−11 (−15.75∼−8)	−3.273	0.001
S_CT	−4.91 ± 5.35	−9.5 ± 5.31	−5.073	0.000

Data are given as median with 25–75% interquartile range or mean ± standard deviation.  < 0.05 was considered statistically significant. NVPAF, nonvalvular paroxysmal atrial fibrillation; LAVmin, left atrial minimum volume; LAVmax, left atrial maximum volume; LAVpreA, volume at onset of left atrial contraction; LAEV, left atrial evacuation volume; LAEF, left atrial ejection fraction; S_R, left atrial reservoir strain; S_CD, left atrial conduit strain; S_CT, left atrial contractile strain.