Reference left atrial dimensions and volumes by steady state free precession cardiovascular magnetic resonance

Table 4 Predictors of left atrial enlargement according to normalized LAV

Univariable analysis: Measurements	RR	95%CI	P value	Chi square
Longitudinal diameter-4ch (> 7 cm)	1.862	1.562, 2.220	< 0.001	NA
Transverse diameter-4ch (> 5.1 cm)	3.263	1.811, 5.880	< 0.001	15.5
Area-4ch (> 28 cm²)	2.199	1.674, 2.889	< 0.001	32.1
Longitudinal diameter-2ch (> 6.3 cm)	2.074	1.543, 2.787	< 0.001	23.4
Transverse diameter-2ch (> 5.6 cm)	1.911	1.481, 2.466	< 0.001	24.8
Area-2ch (> 29 cm²)	1.833	1.419, 2.368	< 0.001	21.6
AP diameter-3ch (> 4.2 cm)	1.741	1.298, 2.337	< 0.001	13.7
Area-3ch (> 25 cm²)	2.205	1.648, 2.951	< 0.001	28.3
Longitudinal diameter/BSA-4ch (> 3.9 cm/m²)	1.980	1.631, 2.404	< 0.001	NA
Transverse diameter/BSA-4ch (> 2.8 cm/m²)	1.657	1.280, 2.145	< 0.001	14.7
Area/BSA-4ch (> 15 cm²/m²)	2.413	1.776, 3.279	< 0.001	31.7
Longitudinal diameter/BSA-2ch (> 3.2 cm/m²)	2.168	1.643, 2.861	< 0.001	29.9
Transverse diameter/BSA-2ch (> 2.9 cm/m²)	1.646	1.195, 2.268	0.002	9.3
Area/BSA-2ch (> 16 cm²/m²)	2.205	1.659, 2.932	< 0.001	19.6
AP diameter/BSA-3ch (> 2.3 cm/m²)	2.013	1.461, 2.774	< 0.001	18.3
Area/BSA-3ch (> 13 cm²/m²)	2.255	1,675, 3.037	< 0.001	28.7
Multivariable analysis: Normalized measurements
Area/BSA-4ch (> 15 cm²/m²)	2.221	1.595, 3.094	< 0.001	46.2
Transverse diameter/BSA-4ch (> 2.8 cm/m²)	1.228	1.028, 1.468	0,023

The upper limit of normal for each parameter is shown in brackets according to table 2.
AP - anteroposterior; 4ch - 4-chamber view; 2ch - 2-chamber view; 3ch - 3 chamber view; BSA - body surface area

ISSN: 1532-429X