Table 3. Correlation between PH severity and 4DE TV characteristics.

Parameters	All cases (n=74)			High-quality image cases (n=51)
	r	P value		r	P value
Annulus area 3D (cm2)	0.225	0.03		0.388	0.005
Annulus area 2D (cm2)	0.220	0.04		0.384	0.005
Annulus area change (%)	0.055	0.61		0.020	0.89
Annulus perimeter (cm)	0.226	0.03		0.399	0.004
4Ch diameter (cm)	0.283	0.007		0.472	<0.001
4Ch diastolic diameter (cm)	0.285	0.007		0.535	<0.001
2Ch diameter (cm)	0.073	0.50		0.139	0.33
Major axis (cm)	0.123	0.25		0.237	0.09
Major diastolic axis (cm)	0.097	0.37		0.240	0.09
Minor axis (cm)	0.253	0.02		0.440	0.001
Sphericity index (%)	0.130	0.22		0.192	0.18
Excursion (mm)	−0.442	<0.001		−0.517	<0.001
Coaptation point height (mm)	0.359	0.001		0.644	<0.001
MTH (mm)	0.411	<0.001		0.705	<0.001
Tenting volume (mL)	0.352	0.001		0.602	<0.001

PH, pulmonary hypertension; 4DE, 4-dimensional echocardiography; TV, tricuspid valve; 3D, 3-dimensional; 2D, 2-dimensional; 4Ch diameter, 4-chamber diameter; 2Ch diameter, 2-chamber diameter; MTH, maximal tenting height.