Table 2 ECG parameters at baseline and at seven weeks
From: Relationship between anthropometric measures and early electrocardiographic changes in obese rats
Baseline. | Seven weeks. | |||||
|---|---|---|---|---|---|---|
Control | Experimental | P value | Control | Experimental | P value | |
Number Of rats (n) | 20 | 20 | 20 | 20 | ||
Heart rate | 342 ± 12 | 357 ± 13 | NS | 313 ± 13 | 364 ± 13 | <0.01 |
RR interval (ms) | 180 ± 7 | 172 ± 2 | NS | 198 ± 8.1 | 170 ± 6.0 | <0.01 |
P wave amplitude (μv) | 19.8 ± 1.9 | 22.6 ± 2.5 | NS | 13.9 ± 1.5 | 14.6 ± 1.7 | NS |
P wave duration (ms) | 28 ± 2.0 | 24 ± 2.4 | NS | 25 ± 1.9 | 23 ± 1.5 | NS |
PR interval (ms) | 30 ± 2.0 | 29 ± 1.3 | NS | 26 ± 1.9 | 26 ± 1.9 | NS |
QRS duration (ms) | 81 ± 4.1 | 80 ± 3.3 | NS | 77 ± 3.6 | 65 ± 2.6 | <0.01 |
QT interval (ms) | 105 ± 3.6 | 101 ± 2.0 | NS | 102 ± 5.2 | 88 ± 3.7 | <0.05 |
Q wave amplitude (μv) | −11.2 ± 1.4 | −11.6 ± 1.5 | NS | −12.8 ± 1.0 | −5.1 ± 0.9 | <0.01 |
R wave amplitude (μv) | 71.7 ± 9.0 | 78.3 ± 10.2 | NS | 61.3 ± 8.4 | 72.3 ± 8.9 | NS |
S wave amplitude (μv) | −20.8 ± 2.1 | −29.1 ± 5.5 | NS | −28.4 ± 4.5 | −26.6 ± 4.0 | NS |
T wave amplitude (μv) | 15.9 ± 1.4 | 17.9 ± 1.8 | NS | 18.8 ± 1.4 | 5.8 ± 0.6 | <0.01 |