rapid cycling
A pattern of bipolar disorder characterized by four or more mood episodes within a 12-month period.
Full Definition
Rapid cycling is a course specifier for bipolar disorder defined by the occurrence of four or more mood episodes (depression, mania, hypomania, or mixed episodes) within a 12-month period. Episodes must meet duration and severity criteria and be clearly demarcated by periods of partial or full remission, or by switching to an episode of opposite polarity. Rapid cycling affects approximately 10-20% of individuals with bipolar disorder and is associated with poorer treatment response, increased suicide risk, and greater functional impairment.
Usage
Usage note: Hyphenate when used as adjective (rapid-cycling); specify in diagnostic coding as course specifier.
In Context
- "The patient was diagnosed with bipolar I disorder with rapid cycling based on six distinct episodes in the past year." — Diagnostic formulation
- "Rapid cycling patterns often require more intensive mood stabilizer therapy." — Treatment planning