Table 1.
Echocardiographic Parameters for Isoproterenol Alone
| Baseline | 24 h | p Value | |
|---|---|---|---|
| Heart rate, beats/min | 336.4 ± 6.7 | 379.8 ± 8.1 | 0.0003 |
| Apical wall thickness, mm | 15.9 ± 0.4 | 19.5 ± 0.5 | <0.0001 |
| Apical strain rate, % | 40.1 ± 1.6 | 24.7 ± 1.5 | <0.0001 |
| Apical fractional area shortening, % | 50.0 ± 2.2 | 38.4 ± 2.5 | 0.0016 |
| Ejection fraction, % | 86.3 ± 1.0 | 82.0 ± 1.5 | 0.0075 |
Values are mean ± SEM. Echocardiographic changes associated with intraperitoneal administration of isoproterenol (5 mg/kg, n = 17). The comparison is between pre-treatment status and 24 h post-isoproterenol.