Micturition Syncopeの1例

A SUPPOSED MECHANISM OF MICTURITION SYNCOPE, WITH A CASE REPORT

はじめに

　排尿の際に失神するという奇異な事実に初めて注目したのはGastaut^1）（1956）である。その後Proudift^2）ら（1959）により，micturition syncopeとしてまとめられた7例の詳しい報告がなされ，にわかに世人の関心を集めてきた。以後毎年本症の報告が続き，本邦でも数十例の報告を見るが，その本態に関する詳細な記述は国内では見当らない。

　当教室においても3例の本症を経験した。中2例は26歳男子，ならびに30歳男子であるが，やや詳細に観察しえた1例についてその概要を報告し，本症の発生機序について若干の考察を試みる。

Clinical history and findings of a case of micturi-tion syncope was presented. The patient, 56 aged man, had revealed 5 times micturition syncope during the past several years. Each attack had occured exactly during or immediately after mictu-rition under a certain particular condition.

Possible mechanisms of micturition syncope were studied and suggested by many authors. However,even if these proposals could interpret the mechanism of syncope triggered by micturition, it to clarify why a few persons faints by micturition will be unable at restricted circumstances.

From the study of our case and the past reported cases, the authors have found that the patients of micturition syncope reveal a tendency of parasym-pathetic hypertonia and the episodes of syncope had occurred at situations yielding vagotonic state to the individuals.

Thus, it seemed to be that a micturition will be a trigger of syncope episode, only when the patients with a vagotonic tendency in a vagotonic state.

The authors have concluded that the micturition syncope could be one of the utmost condition of vagotonia in vagotonic persons.