Left atrial structure and functional quantitation using cardiac magnetic resonance: comparison of manual delineation vs. multimodality tissue tracking based semi-automated methods

Table 1 Comparison between the Simpson's method vs. Biplane method, Manual vs. MTT

	Biplane	Simpson's	p	r	p
Manual
Vmax (ml)	84.3 ± 34.6	88.1 ± 35.2	0.08	0.95	< 0.001
LAEF (%)	0.44 ± 0.1	0.34 ± 0.1	< 0.001	0.88	< 0.001
LAPEF (%)	0.16 ± 0.08	0.11 ± 0.05	< 0.001	0.70	< 0.001
LAAEF(%)	0.37 ± 0.07	0.28 ± 0.07	< 0.001	0.70	< 0.001
MTT
Vmax (ml)	86.5 ± 33.6	85.2 ± 35.2	0.53	0.95	< 0.001
LAEF (%)	0.46 ± 0.2	0.33 ± 0.10	< 0.001	0.85	< 0.001
LAPEF (%)	0.18 ± 0.05	0.11 ± 0.04	< 0.001	0.57	0.002
LAAEF(%)	0.38 ± 0.08	0.27 ± 0.06	< 0.001	0.61	< 0.001
	MTT	Manual	p	r	p
Biplane
Vmax (ml)	86.5 ± 33	84.4 ± 34	0.08	0.98	< 0.001
LAEF (%)	0.45 ± 0.13	0.44 ± 0.12	0.21	0.88	< 0.001
LAPEF (%)	0.17 ± 0.05	0.16 ± 0.08	0.67	0.57	0.002
LAAEF(%)	0.16 ± 0.08	0.36 ± 0.09	0.21	0.83	< 0.001
Simpson's
Vmax (ml)	85.2 ± 35.2	88.2 ± 35.2	< 0.001	1.00	< 0.001
LAEF (%)	0.33 ± 0.1	0.34 ± 0.1	0.19	0.92	< 0.001
LAPEF (%)	0.11 ± 0.04	0.11 ± 0.05	0.43	0.29	0.14
LAAEF(%)	0.27 ± 0.06	0.28 ± 0.06	0.52	0.86	< 0.001

Results are reported as mean ± standard deviation. Abbreviations: Vmax; maximal volume; LAEF, left atrial total ejection fraction; LAPEF, left atrial passive ejection fraction; LAAEF, left atrial active ejection fraction; Smax, maximal global strain (a longitudinal strain vs. b circumferential strain); r, Pearson's correlation.

ISSN: 1532-429X