Electrophysiological Changes by Exercise and Cold Provocation Test in a Patient with Hyperkalemic Periodic Paralysis.
- Author:
Gyu Sik KIM
1
;
Min Kyung CHOO
;
Youn Min OH
;
Seung Min KIM
;
Il Nam SUNWOO
Author Information
1. Department of Neurology, Yonsei University College of Medicine.
- Publication Type:Original Article
- Keywords:
Paralysis;
Hyperkalemic periodic;
Electrodiagnosis
- MeSH:
Diagnosis, Differential;
Electrodiagnosis;
Genes, vif;
Humans;
Hypokalemic Periodic Paralysis;
Muscle, Skeletal;
Mutation, Missense;
Paralysis;
Paralysis, Hyperkalemic Periodic*;
Physiological Phenomena;
Sodium Channels
- From:Journal of the Korean Neurological Association
2000;18(5):665-668
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Hyperkalemic periodic paralysis and paramyotona congenita share common clinical manifestations, such as autosomal dominant diseases with missense mutations at a gene encoding alpha-subunit of skeletal muscle voltage sensitive sodium channel (SCN4A). Exercise and cold provocation tests are physiological phenomena of clinical characteristics of these diseases. The authors experienced a case with hyperkalemic periodic paralysis and performed these tests comparing them with a patient with hypokalemic periodic paralysis and a normal person. Significant decremental changes of CMAPs were found by both tests in the case with hyperkalemic periodic paralysis, compared with those in a case of hypokalemic periodic paralysis or normal control. In conclusion, we suggest that exercise and cold provocation tests may be useful for the differential diagnosis between hyperkalemic periodic paralysis and hypokalemic periodic paralysis.
