Automatic analysis of heart rate variation: II. Findings in patients attending an EMG laboratory.
An automatic method was used to measure the heart rate variation with breathing in patients with different neuromuscular conditions attending a laboratory of electromyography (EMG). The objective was to determine the frequency of abnormalities in various conditions and the relationship between R-R variation and different nerve conduction parameters. The percentages of reduced R-R variation were 73% in diabetics, 35% in Guillain-Barré syndrome, 22% in amyotrophic lateral sclerosis, and 50% in amyloidosis. R-R variation in diabetics was significantly correlated to most parameters of nerve conduction. In Guillain-Barré syndrome it correlated significantly with the ulnar and median M-response amplitudes. Most patients with myopathies showed normal R-R variation.
Nogués
M A
MA
Department of Clinical Neurophysiology, University Hospital, Uppsala, Sweden.
Stålberg
E V
EV
D000293:Adolescent; D000328:Adult; D000368:Aged; D000690:Amyotrophic Lateral Sclerosis / Q000503:physiopathology; D003929:Diabetic Neuropathies / Q000503:physiopathology; D004576:Electromyography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008838:Microcomputers; D008875:Middle Aged; D009431:Neural Conduction; D010523:Peripheral Nervous System Diseases / Q000503:physiopathology*; D011129:Polyradiculoneuropathy / Q000503:physiopathology