[Short-term changes in cardiovascular mortality rates during a synodic month].

Statistically high significant periodicity (in the range of 2.3 to 4.2 days) in the cardiovascular mortality has been proved. This is connected with the alternation of lunar phases in the course of the synodic moon. The explanation as some endogene rhythms was excluded. To determine the origin of these short periodical changes will be a subject of further investigations.