heart rate variability
Also found in: Dictionary, Thesaurus, Financial, Acronyms, Wikipedia.
Related to heart rate variability: heart rate range
heart rate variabilityAbbreviation: HRV
Spontaneous fluctuations above and below the mean heart rate. A reduced HRV is associated with an increased incidence of total mortality and cardiac events in post-myocardial infarction patients, as well as in apparently healthy individuals, esp. older persons.
See also: variability
Medical Dictionary, © 2009 Farlex and Partners