Table 2.
Exercise ECG test features depending on the chronotropic index.
| Characteristic |
Chronotropic index >35.6
(n=79) |
Chronotropic index ≤35.6
(n=56) |
Р-value |
|---|---|---|---|
| Achieved METs | 8.7±3.8 | 6.0±2.7 | 0.002 |
| Percentage of peak heart rate | 80 [69-94] | 65 [56-77] | <0.001 |
| Peak heart rate | 148 [135-167] | 118 [98-138] | <0.001 |
| Heart rate in the end of the first minute of recovery period | 121 [106-140] | 110[103-128] | <0.001 |
| Chronotropic reserve in the first minute of recovery period | 17 [12-29] | 9 [6-16] | <0.001 |
| Mean chronotropic index | 46.8 [38.3-59.4] | 26.7[18.9-32.6] | 0.01 |
METs = metabolic equivalence