Table 1.

 Detection of pathology

Primary cause of mitral regurgitation	Total number of segments	En-face view		Longitudinal view
		Accurate detection	Inaccurate detection	Accurate detection	Inaccurate detection
Flail	23	15 (65%)	8 (35%)	22 (96%)	1 (4%)
Prolapse	20	10 (50%)	10 (50%)	19 (95%)	1 (5%)
Tethering	9	4 (44%)	5 (56%)	9 (100%)	0 (0%)
Perforation	3	1 (33%)	2 (67%)	3 (100%)	0 (0%)
Erosion	3	1 (33%)	2 (67%)	2 (67%)	1 (33%)

The table shows the superiority of longitudinal views over en-face views in the accurate detection of functional pathology. Values represent numbers of segments and percentage of total number of segments with that morphology.