Comparison of right atrial volume measurements using single-plane area-length and stack-of-short-axis methods: A 3.0 T cardiac magnetic resonance study

Table 2 Right atrial chamber quantifications (N = 40)

	Stack-of-short-axis method				Single-plane area-length method				p-value **
	Total (n = 40)	Female (n = 20)	Male (n = 20)	p-value*	Total (n = 40)	Female (n = 20)	Male (n = 20)	p-value*	p-value **
Include RAA
RA maximum volume, ml	84.9 ± 22.9	76.9 ± 17.9	92.9 ± 24.9	0.025	63.7 ± 16.0	55.2 ± 13.3	72.3 ± 14.0	< 0.001	< 0.001
Indexed RA maximum volume, ml/m²	49.4 ± 11.1	48.0 ± 9.7	50.7 ± 12.6	0.452	37.1 ± 7.9	34.7 ± 8.1	39.5 ± 7.2	0.052	< 0.001
RA minimum volume, ml	45.3 ± 15.9	39.6 ± 15.0	51.0 ± 15.0	0.021	34.7 ± 12.2	26.8 ± 9.1	42.7 ± 9.6	< 0.001	< 0.001
Indexed RA minimum volume, ml/m²	26.3 ± 8.2	24.6 ± 8.1	28.0 ± 8.2	0.193	20.1 ± 6.1	16.8 ± 5.4	23.3 ± 4.9	< 0.001	< 0.001
RAEF, %	47.3 ± 8.7	49.8 ± 8.1	44.8 ± 8.7	0.066	45.9 ± 13.1	51.9 ± 11.3	40.0 ± 12.3	0.003	0.547
Exclude RAA
RA maximum volume, ml	76.8 ± 21.8	68.1 ± 16.5	85.4 ± 23.3	0.010	53.5 ± 14.2	44.5 ± 10.3	62.5 ± 11.6	< 0.001	< 0.001
Indexed RA maximum volume, ml/m²	44.6 ± 10.5	42.6 ± 9.0	46.6 ± 11.7	0.228	31.1 ± 7.0	28.0 ± 6.4	34.3 ± 6.2	0.003	< 0.001
RA minimum volume, ml	42.2 ± 15.5	36.1 ± 14.3	48.4 ± 14.5	0.010	28.3 ± 11.1	20.8 ± 7.1	35.7 ± 9.2	< 0.001	< 0.001
Indexed RA minimum volume, ml/m²	26.3 ± 8.2	22.4 ± 7.5	26.5 ± 7.6	0.92	16.3 ± 5.6	13.1 ± 4.3	19.5 ± 4.8	< 0.001	< 0.001
RAEF, %	45.7 ± 8.7	48.4 ± 9.0	43.1 ± 7.9	0.058	48.1 ± 11.7	53.5 ± 10.4	42.7 ± 10.6	0.002	0.267

Data are presented as mean ± SD
* p-value for females vs. males
** p-value for overall stack-of-short-axis vs. single-plane area-length methods
RA, right atrium; RAA, right atrial appendage; RAEF, right atrial ejection fraction

ISSN: 1471-2342