[The effect of solar activity on lunar changes in cardiovascular mortality]

After a 9-year follow-up of mortality due to cardiovascular emergencies (a total of 1,437 cases), the author found its frequency to be correlated with the moon phases. There are two maximum and minimum risk periods during lunation; the differences between them have a high statistical significance. The mortality study which registered the cases according to separate periods of maximum solar activity (spots, eruptions, etc.), medium and minimum activity recorded on three individual curves, showed that the maximum and minimum mortality curves were shifting in time phase so that during high solar activity, the minimum mortality was nearer to the new moon and full moon phases, while the maximum death rate approached the first and last lunar quarters; during the medium and low solar activities, the mortality maxima and minima were shifting counterclockwise the moon's orbit round the Earth, i. e. from the Earth's view with the Sun moving more and more to the west. The author offers some probable explanations for this phenomenon, which can help to make a more exact prognosis of critical days for patients with cardiovascular disorder. In addition, these findings can contribute to basic helio-geophysical research.