Comparison of mitral annulus geometry between patients with ischemic and non-ischemic functional mitral regurgitation: implications for transcatheter mitral valve implantation

Table 1 Comparison of mitral annulus parameter among transthoracic and transoesophageal data sets

	Transthoracic N = 15	Transoesophageal N = 15	p	r
Diastolic dimension
Annulus area (3D) (cm²)	11.5 ± 3.1	12.4 ± 3.2	0.031	0.879**
Annulus best fit plane (cm²)	10.6 ± 3.0	11.7 ± 3.1	0.016	0.869**
Annulus perimeter (cm)	12.1 ± 1.7	12.6 ± 1.6	0.036	0.883**
AP diameter (cm)	3.5 ± 0.5	3.8 ± 0.5	0.012	0.799**
ALPM diameter (cm)	3.7 ± 0.5	3.8 ± 0.5	0.342	0.840**
Commissural diameter (cm)	3.7 ± 0.4	3.8 ± 0.5	0.231	0.777**
Itertrigonal distance (cm)	2.8 ± 0.3	3.0 ± 0.4	0.094	0.715**
Sphericity index	0.9 ± 0.1	1.0 ± 0.1	0.150	0.157
Annulus height (mm)	7.3 ± 1.7	6.8 ± 1.6	0.343	0.559*
Non planar angle	156 ± 13	152 ± 11	0.314	0.474
Mitro-aortic angle	131 ± 8	125 ± 10	0.039	0.418
Systolic dimension
Annulus area (3D) (cm²)	10.2 ± 2.6	11.0 ± 2.6	0.006	0.936**
Annulus best fit plane (cm²)	9.3 ± 2.5	10.2 ± 2.5	0.001	0.959**
Annulus perimeter (cm)	11.4 ± 1.5	11.8 ± 1.4	0.010	0.943**
AP diameter (cm)	3.2 ± 0.4	3.4 ± 0.6	0.002	0.624* ^ρ
ALPM diameter (cm)	3.6 ± 0.5	3.6 ± 0.4	0.329	0.857**
Commissural diameter (cm)	3.5 ± 0.4	3.6 ± 0.4	0.151	0.889**
Itertrigonal distance (cm)	2.6 ± 0.4	3.0 ± 0.4	0.000	0.830**
Sphericity index	0.9 ± 0.1	0.9 ± 0.1	0.062	0.321^ρ
Annulus height (mm)	7.0 ± 1.3	7.0 ± 1.4	0.910	0.300
Non planar angle (°)	153 ± 10	153 ± 9	0.893	0.240
Aorto-mitral angle (°)	139 ± 10	129 ± 8	0.005	0.367
Tenting height (mm)	10.3 ± 2.0	7.2 ± 3.6	0.02	- 0.108
Tenting area (cm²)	2.3 ± 0.6	2.3 ± 0.7	0.934	0.542*
Tenting volume (mL)	4.2 ± 1.3	4.1 ± 1.5	0.742	0.747**

Data are expressed as Mean ± Standard Deviation
Abbreviations: ALPM anterolateral-posteromedial, AP antero-posterior diameter
* for correlation with p < 0.05; ** for correlation with p < 0.001; ^ρ evaluated with Sperman’s correlation

ISSN: 1476-7120