Table 1.

Patient demographics and characteristics.

Demographics	Number (%)
1.  Gender
2.  Female	41 (53.9)
3.  Male	35 (46.1)
1.  Pre-op AF
2.  No	37 (48.7)
3.  Yes	39 (51.3)
1.  Pre-existing CKD
2.  Yes	43 (56.6)
3.  No	33 (43.4)
1.  Pre-existing respiratory disease
2.  No	56 (73.7)
3.  Yes	20 (26.3)
1.  Etiology of MV disease
2.  Primary MR	55 (72.4)
3.  Secondary MR	3 (3.9)
4.  Mitral stenosis	9 (11.8)
5.  Failed previous MV surgery	9 (11.8)
1.  Etiology of tricuspid valve disease
2.  Primary TR	2 (2.6)
3.  Secondary TR	74 (97.4)
1.  Operation
2.  Mitral valve replacement + tricuspid valve repair	33 (43.4)
3.  Mitral valve repair + tricuspid valve repair	41 (53.9)
4. Mitral valve replacement + tricuspid valve replacement	2 (2.6)
1.  Degree of TR
2.  Mild	2 (2.6)
3.  Moderate	25 (32.9)
4.  Severe	49 (64.5)
1.  RV dysfunction
2.  Normal	34 (44.7)
3.  Mild	11 (14.5)
4. Moderate	18 (23.7)
5.  Severe	13 (17.1)
1.  RA volume index
2.  >28	51 (69.9)
3.  ≤28	22 (30.1)
1.  RVMPI
2.  <0.6	42 (62.7)
3.  ≥0.6	25 (37.3)
1.  RVFAC
2.  ≥0.35	16 (21.6)
3.  <0.35	58 (78.4)
1.  RV size (qualitative)
2.  Normal	30 (40)
3.  Dilated	45 (60)
1.  LVEF
2.  Normal	66 (86.8)
3.  Mild	6 (7.9)
4.  Moderate	3 (3.9)
5.  Severe	1 (1.3)
1.  S’
2.  <9.5 cm/s	15 (23.8)
3.  ≥9.5 cm/s	48 (76.2)
1.  TAPSE
2.  <1.7 cm	24 (34.3)
3.  ≥1.7 cm	46 (65.7)

Abbreviations: AF (atrial fibrillation), CKD (chronic kidney disease), MV (mitral valve), MR (mitral regurgitation), TR (tricuspid regurgitation), RV (right ventricle), RA (right atrium), RVMPI (right ventricular myocardium performance index), RVFAC (right ventricle fractional area change), LVEF (left ventricle ejection fraction), S’ (peak systolic tissue velocity at the tricuspid annulus), TAPSE (tricuspid annular plane systolic excursion).