Table 9.

Early systolic MV measurements indexed to BSA, by age groups

	All subjects
	18–40 y	41–65y	>65 y
	(n = 266)	(n = 249)	(n = 233)	P
MA size
AP diameter, cm/m2	1.8 ± 0.2	1.8 ± 0.3	1.9 ± 0.3	* ,†,‡
AL-PM diameter, cm/m2	2.1 ± 0.3	2.1 ± 0.3	2.1 ± 0.3
Circumference, cm/m2	6.6 ± 0.8	6.6 ± 0.8	6.8 ± 0.9
2D area, cm2/m2	5.4 ± 1.1	5.5 ± 1.2	5.5 ± 1.3
3D area, cm3/m2	5.7 ± 1.1	5.8 ± 1.2	6.0 ± 4.2
MA shape
Annular height, cm/m2	0.51 ± 0.14	0.47 ± 0.14	0.50 ± 0.14	* ,‡,§
Tenting volume, cm/m2	1.7 ± 0.8	2.1 ± 0.7	1.7 ± 0.7	* ,‡,§
Tenting area, cm2/m2	1.1 ± 0.4	1.3 ± 0.4	1.1 ± 0.3	* ,‡,§
Tenting height, mm/m2	5.1 ± 1.6	5.6 ± 2.0	5.6 ± 1.6	* ,†,§
Mitral leaflets
Anterior leaflet area, cm2/m2	4.0 ± 0.9	3.9 ± 0.8	3.6 ± 0.9	* ,†,‡
Posterior leaflet area, cm2/m2	3.0 ± 0.9	3.5 ± 0.9	3.5 ± 1.0	* ,†,§
Anterior leaflet length, cm/m2	1.5 ± 0.2	1.5 ± 0.3	1.5 ± 0.2	* ,†,§
Posterior leaflet length, cm/m2	0.8 ± 0.2	0.9 ± 0.2	0.9 ± 0.2	* ,†,§

Data are expressed as mean ± SD. NPA and sphericity index were not indexed.

^*Three-way analysis of variance.

^†Student’s t test for 18 to 40 versus >65 years.

^‡Student’s t test for 41 to 65 versus >65 years.

^§Student’s t test for 18 to 40 versus 41 to 65 years.