Independent prognostic value of left atrial function by two-dimensional speckle tracking imaging in patients with non -ST-segment-elevation acute myocardial infarction

Table 4 Left atrial STE characteristics of NSTEAMI patients

Characteristic	Had events (n = 20)	No events (n = 31)	p
Apical long axis
GLSs (%)	−13.46 ± 7.70	−14.59 ± 7.62	0.607
GLSr (%)	13.02 ± 9.64	16.86 ± 9.31	0.163
GLSRs (s⁻¹)	1.57 ± 0.58	2.04 ± 0.82	0.027*
GLSRe (s⁻¹)	−1.31 ± 0.77	−1.51 ± 0.77	0.366
GLSRa (s⁻¹)	−1.87 ± 1.10	−2.08 ± 0.95	0.489
Four-chamber
GLSs (%)	−12.32 ± 5.65	−15.42 ± 7.31	0.095
GLSr (%)	11.33 ± 7.37	14.74 ± 7.62	0.116
GLSRs (s⁻¹)	1.38 ± 0.79	1.56 ± 0.84	0.441
GLSRe (s⁻¹)	−1.04 ± 0.47	−1.30 ± 0.59	0.084
GLSRa(s⁻¹)	−1.52 ± 0.85	−1.99 ± 1.08	0.092
Two-chamber
GLSs (%)	−11.85 ± 3.77	−13.67 ± 2.92	0.071
GLSr (%)	9.78 ± 5.63	11.30 ± 4.98	0.314
GLSRs (s⁻¹)	1.21 ± 0.45	1.25 ± 0.36	0.739
GLSRe (s⁻¹)	−0.87 ± 0.51	−1.03 ± 0.47	0.271
GLSRa(s⁻¹)	−1.51 ± 0.62	−1.81 ± 0.48	0.057
Baseline Mean
GLSs (%)	−12.54 ± 4.61	−14.56 ± 4.76	0.136
GLSr (%)	11.38 ± 5.10	14.30 ± 5.58	0.059
GLSRs (s⁻¹)	1.39 ± 0.48	1.62 ± 0.55	0.003**
GLSRe (s⁻¹)	−1.07 ± 0.42	−1.25 ± 0.48	0.013*
GLSRa(s⁻¹)	−1.64 ± 0.67	−1.86 ± 0.71	0.138
6 months Mean
GLSs (%)	−12.76 ± 4.78	−13.88 ± 5.21	0.094
GLSr (%)	13.22 ± 5.42	14.74 ± 6.89	0.228
GLSRs (s⁻¹)	1.73 ± 0.48	1.98 ± 0.61	0.017*
GLSRe (s⁻¹)	−1.69 ± 0.46	−1.75 ± 0.52	0.064
GLSRa(s⁻¹)	−1.84 ± 0.49	−1.98 ± 0.37	0.445

GLSs global longitudinal left atrial peak negative strain during atrial systole, GLSr global longitudinal left atrial peak positive strain during ventricle systole, GLSRs global longitudinal left atrial peak positive strain rate during ventricle systole, GLSRe global longitudinal left atrial peak negative strain rate during early ventricular diastole, GLSRa global longitudinal left atrial peak negative strain rate during late ventricular diastole
*P < 0.05, **P < 0.01, between Had events group and No events group

ISSN: 1471-2261