| Chronotropic incompetence | |
|---|---|
| Other names | Chronotropic intolerance |
| Symptoms | Exercise intolerance |
| Diagnostic method | Cardiopulmonary exercise test |
| Prevalence | 50% among people with heart failure |
Chronotropic incompetence (CI) is the inability of heart rate to increase as expected in response to exercise. The condition can be defined in different ways and occurs in various diseases. Sufferers have a higher risk of cardiovascular disease and early death.