chronotropic incompetence
Pronunciation: KRON-oh-trop-ik in-KOM-pe-tens
Inability to achieve adequate heart rate response during exercise, potentially indicating underlying cardiac pathology in athletic populations.
Full Definition
Chronotropic incompetence refers to the failure to achieve an appropriate heart rate response to exercise, typically defined as inability to reach 85% of age-predicted maximum heart rate during maximal exercise testing. In sports cardiology, this finding may indicate sinus node dysfunction, chronotropic medications, or underlying cardiac disease that could affect athletic performance and safety. However, interpretation in athletes requires consideration of enhanced parasympathetic tone and potential beta-blocker use. The condition may manifest as exercise intolerance, fatigue, or reduced athletic performance, and requires careful evaluation to determine underlying etiology and appropriate management.
Usage
Usage note: Maintain consistent spelling of 'incompetence' rather than 'incompetency' in clinical documentation.
In Context
- "Exercise testing revealed chronotropic incompetence with peak heart rate only 70% of predicted maximum." — Stress test interpretation
- "The athlete's symptoms and chronotropic incompetence warranted evaluation for underlying sinus node disease." — Sports cardiology assessment