The persistence of the M-echos in the A-mode echoencephalograms of patients demonstrating "irreversible coma with brain inactivity".
D000293:Adolescent; D000328:Adult; D001921:Brain / Q000503:physiopathology*; D001926:Brain Death; D003128:Coma / Q000503:physiopathology*; D004453:Echoencephalography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged