Novel Models for the Prediction of Left Atrial Appendage Thrombus in Patients with Chronic Nonvalvular Atrial Fibrillation

Table 2

Left atrial strain and strain rate parameters in patients with nonvalvular atrial fibrillation.

LA parameter on TTE	With LAAT (n = 35)	Without LAAT (n = 109)	value
Diameter, cm	6.49 ± 0.59	6.13 ± 0.77	0.015
Area in two-chamber view (cm^2)	28.51 ± 4.17	24.33 ± 5.54	<0.001
Area in four-chamber view (cm^2)	30.0 ± 5.32	26.35 ± 5.43	0.001
Volume (mL)	111.79 ± 30.42	88.33 ± 29.02	<0.001
Volume index (mL/m^2)	69.59 ± 21.17	55.78 ± 20.16	0.001
Positive strain in two-chamber view (%)	5.68 ± 1.91	10.61 ± 6.92	<0.001
Positive strain in four-chamber view (%)	5.28 ± 2.54	10.47 ± 5.31	<0.001
Positive strain rate in two-chamber view (s^−1)	0.52 ± 0.16	0.7 ± 0.31	<0.001
Positive strain rate in four-chamber view (s^−1)	0.51 ± 0.15	0.69 ± 0.26	<0.001
Negative strain rate in two-chamber view (s^−1)	−0.63 ± 0.19	−0.91 ± 0.45	<0.001
Negative strain rate in four-chamber view (s^−1)	−0.57 ± 0.18	−0.98 ± 0.41	<0.001

Data represent mean ± standard deviation. LA: left atrial; LAAT: left atrial appendage thrombus; TEE: transthoracic echocardiography.