London Criteria

London Criteria

The criteria for defining myalgic encephalomyelitis/post-viral fatigue syndrome (ME/PVFS).

Diagnostic criteria for ME/PVFS research subjects
(a) Exercise-induced fatigue precipitated by minimal exertion relative to patient's previous exercise tolerance.
(b) Impairment of short-term memory—loss of concentration, usually coupled with other neurologic and psychological disturbances such as emotional lability, nominal dysphasia, disturbed sleep patterns, disequilibrium or tinnitus.
(c) Fluctuation of symptoms, usually precipitated by either physical or mental exercise, (b) above.

These symptoms should have been present for at least 6 months and should be ongoing.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
In 1992, Goudsmit and colleagues developed the "London criteria" for research on ME.
Patients with ME were diagnosed according to the London criteria (National Task Force, 1994).
A total of 26 patients (19 females: 73% and 7 males: 27%) met the London criteria for ME (National Task Force, 1994).
Full browser ?