Malpas S C, Maling T J
Department of Medicine, Wellington School of Medicine, New Zealand.
Diabet Med. 1989 Dec;6(9):822-3. doi: 10.1111/j.1464-5491.1989.tb01288.x.
A diabetic patient with parasympathetic neuropathy underwent 24-h ECG monitoring. During the 24 hours the patient had a hypoglycaemic event. Heart rate variability was greatly increased during this time, though heart rate was unaltered. The reasons for the sudden increase are unknown but may indicate a fruitful line for further research.