Table 3. Baseline echocardiographic characteristics of the patients.

Author	MR grade ≥3, %			LVEF, % [mean, SD]			LVEDD, mm [mean, SD]			LVESD, mm [mean, SD]			SPAP, mmHg [mean, SD]			Mean TMG [mean, SD]
	DMR	FMR		DMR	FMR		DMR	FMR		DMR	FMR		DMR	FMR		DMR	FMR
Seeger (12)	100	100		50 [16]	36 [17]		58 [13]	64 [10]		40 [13]	51 [13]		52 [17]	49 [16]		2.3 [1.3]	1.6 [0.9]
Nickenig (13)	99	99		60 [9]	37 [14]		–	–		–	–		54 [17]	44 [13]		2.3 [1.3]	1.9 [1.3]
Schmidt (14)	100	100		51	31		–	–		–	–		49 [17]	46 [13]		–	–
Schueler (15)	100	100		57 [12]	39 [15]		–	–		–	–		48 [13]	43 [14]		1.7 [0.9]	1.4 [0.9]
Braun (16)	96	83		58 [11]	35 [13]		56 [7]	64 [11]		35 [9]	51 [12]		–	–		–	–
Rudolph (18)	100	100		57 [10]	71		60 [9]	68 [11]		42 [9]	56 [13]		–	–		–	–
Tay (19)	100	100		60 [11]	36 [12]		56 [7]	63 [10]		36 [7]	52 [11]		44 [21]	45 [19]		–	–
Chan (20)	100	100		46 [14]	32 [17]		57 [9]	64 [9]		35 [7]	50 [13]		51 [16]	48 [15]		1.4 [0.4]	2.2 [1.3]
Grasso (21)	100	100		55 [7]	33 [10]		–	–		–	–		–	–		–	–
Maisano (22)	97	98		–	–		–	–		35 [9]	51 [14]		–	–		–	–
Remy (17)	100	100		50 [14]	45 [16]		59 [9]	57 [11]		45 [11]	44 [12]		55 [20]	62 [17]		3.6 [1.7]	3.5 [1.9]
Pooled value	99	99		56 [12]	37 [14]		58 [9]	65 [11]		38 [9]	52 [13]		51 [17]	45 [15]		2.3 [1.1]	1.9 [0.9]
P value	0.646			<0.001			<0.001			<0.001			<0.001			<0.001

DMR, degenerative mitral regurgitation; FMR, functional mitral regurgitation; LVEDD, left ventricular end-diastolic dimension; LVEF, left ventricular ejection fractions; LVESD, left ventricular end-systolic dimension; MR, mitral regurgitation; SPAP, systolic pulmonary artery pressure; TMG, transmitral gradient.