Table 4.
Echocardiogram measurements
| Variable | Na ≤ 134 mEq/L (n = 40) | Na ≥ 135 mEq/L (n = 218) | p-value |
|---|---|---|---|
|
| |||
| LV end-diastolic diameter (cm) | 5.8 ± 1.2 | 5.9 ± 1.3 | 0.90 |
| LV end-diastolic diameter index (cm/m2) | 2.9 ± 0.6 | 2.9 ± 0.6 | 0.90 |
| RV dilated (Y/N) | 28 (70%) | 137 (63%) | 0.67 |
| RV dilatation severity | 0.89 | ||
| Mild | 7 (25%) | 41 (30%) | |
| Mild-moderate | 0 (0%) | 3 (2%) | |
| Moderate | 11 (39%) | 42 (31%) | |
| Moderate-severe | 1 (4%) | 3 (2%) | |
| Severe | 4 (14%) | 18 (13%) | |
| Indeterminate | 5 (18%) | 30 (22%) | |
| RV systolic function reduced (Y/N) | 32 (80%) | 162 (74%) | 0.70 |
| RV dysfunction severity | 0.77 | ||
| Mild | 8 (25%) | 53 (33%) | |
| Mild-moderate | 1 (3%) | 1 (1%) | |
| Moderate | 12 (38%) | 50 (31%) | |
| Moderate-severe | 2 (6%) | 10 (6%) | |
| Severe | 6 (19%) | 32 (20%) | |
| Indeterminate | 3 (9%) | 16 (10%) | |
| LA volume (mL) | 79.6 ± 38.3 | 84.0 ± 37.4 | 0.57 |
| LA volume index (mL/m2) | 39.7 ± 16.4 | 42.2 ± 18.2 | 0.50 |
| RA dilated (Y/N) | 17 (43%) | 90 (41%) | 0.41 |
| Mitral regurgitation (at least moderate) | 3 (8%) | 20 (9%) | 0.90 |
| Aortic regurgitation (at least moderate) | 1 (3%) | 4 (2%) | 0.52 |
| Tricuspid regurgitation (at least moderate) | 5 (13%) | 19 (9%) | 0.84 |
| Tricuspid regurgitant peak velocity (m/s) | 2.2 ± 0.8 | 2.2 ± 0.8 | 0.97 |
Transthoracic echocardiogram measurements when available at 3 months after implant in LVAD patients with and without hyponatremia. There are no significant differences between groups. LA, left atrium; LV, left ventricular; RV, right ventricle; RA, right atrium.