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Chronotropic incompetence
Max heart rate - Resting heart rate
X 100
(220 - age) - Resting heart rate
-
( 220 -
) -
X 100
Chronotropic incompetence = inability to achieve heart rate reserve (HRR)
100 x [(Max heart rate - Resting heart rate) / ((220 - age) - Resting heart rate)]
- <80% in patients not taking a beta-blocker.
- ≤62% in patients taking a beta-blocker.
Reference
Brubaker PH, Kitzman DW. Chronotropic Incompetence. Circulation [Internet]. 2011 Mar 8 [cited 2025 Aug 2];123(9):1010–20. Available from: https://doi.org/10.1161/CIRCULATIONAHA.110.940577
Result
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