Table 3.
Comparison of parameters of left ventricular systolic function between thyrotoxicosis patients and control
| Parameters | Mean values for thyrotoxicosis patients (SD) [reference range] | Mean values for control (SD) | Student’s t-test value | P-value |
|---|---|---|---|---|
| LVEF (%) | 69.7 (10.2) [41–79] | 59 (3.3) | 2.47 | <0.01* |
| FS (%) | 43.9 (9.8) [12–48] | 36.83 (8.4) | 2.8 | <0.01* |
| Cardiac output (L) | 7.15 (1.47) [3.5–8.0] | 4.7 (0.67) | 7.64 | <0.01* |
| Cardiac index L/min/m2 | 4.1 (0.84) [2.1–4.8] | 3.2 (0.29) | 4.13 | <0.01* |
| Peak aortic systolic velocity (cm/seconds) | 144 (26.7) [81–165] | 113 (11.5) | 7.5 | <0.01* |
| VCF (circumferences/second) | 1.74 (0.34) [1.8–2.1] | 1.21 (0.12) | 11.0 | <0.01* |
| End diastolic diameter | 5.35 cm (0.76) | 5.0 cm (0.73) | <0.01* | |
| Interventricular septal thickness | 0.95 cm (0.12) | 0.77 cm (0.7) | 0.05* | |
| Posterior wall thickness | 0.89 cm (0.4) | 0.79 cm (0.9) | 0.05* | |
| Left ventricular mass index | 127 (32.3) | 84 (13.8) | 0.05* | |
| Relative wall thickness | 0.53 (0.15) | 0.33 (1.4) | 0.05* |
Note:
*
Represents significant value.
Abbreviations: LVEF, left ventricular ejection fraction; SD, standard deviation; FS, fractional shortening; VCF, velocity of circumferential fiber.