Table 1.

M-mode echocardiographic measurements

Parameter	Control Average ± SE	Exposed Average ± SE
Heart weight, mg	743.00 ± 39.39	837.00 ± 51.00
Body weight, g	299.63 ± 8.94	288.5 ± 1.50
Heart weight:body weight	2.51 ± 0.18	2.90 ± 0.19
Heart rate, beats/min	416.60 ± 10.38	403.54 ± 10.05
Systolic diameter, mm	2.29 ± 0.09	2.71 ± 0.18*
Diastolic diameter, mm	5.62 ± 0.08	5.84 ± 0.18
Systolic volume, μl	18.66 ± 1.97	29.46 ± 5.08*
Diastolic volume, μl	155.39 ± 5.22	171.61 ± 12.12
Stroke volume, μl	136.73 ± 5.54	142.15 ± 8.84
Ejection fraction, %	87.88 ± 1.25	83.53 ± 1.98*
Fractional shortening, %	59.16 ± 1.76	53.89 ± 2.09*
Cardiac output, ml/min	57.15 ± 3.16	57.33 ± 3.79

Values are means ± SE; n = 10 for each group.

^*P < 0.05 for control vs. exposed animals.