Dynamic changes of mitral valve annulus geometry at preprocedural CT: relationship with functional classes of regurgitation

European Radiology Experimental

Table 3 Mitral annular dimensions in the different types of MR based on Carpentier’s classification

	Type I (total, 3)	Type II (total, 16)	Type IIIa (total, 16)	Type IIIb (total, 16)	p value
Mitral valve geometry
D-shaped area max, cm²	15.9 ± 7.8	18.0 ± 4.5^a	12.9 ± 2.4^a	15.8 ± 3.2	0.002
Maximum TT distance, mm	30.3 ± 7.9	27.5 ± 4.5	25.4 ± 3.5	26.0 ± 2.9	0.152
Maximum IC diameter, mm	47.9 ± 3.1	52.6 ± 6.4^a	44.4 ± 5.0^a	49.0 ± 5.6	0.002
Maximum SL diameter, mm	41.4 ± 2.3	42.5 ± 6.0^a	36.5 ± 5.0^a	40.8 ± 4.4	0.013
Calcification volume, cm³	0 ± 0	635 ± 2,031	1,331± 2,551	360 ± 1,106	0.469
Maximum area in 20–40% cycle	1/3, 33%	10/16, 63%	8/16, 50%	8/16, 50%	-
Maximum area in 60–80% cycle	1/3, 33%	3/16, 19%	5/16, 31%	3/16, 19%	-

Data are reported as mean ± standard deviation
MR Mitral valve regurgitation, TT Trigone-to-trigone distance, IC Intercommissural diameter, SL Septal-to-lateral diameter
^aAt post hoc analysis significant differences (p = 0.001 for each parameter)