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Aneurysm Rupture: Lunar Cycle, Weather, Atmospheric Pressure, Myth or Reality?

Subarachnoid hemorrhage (SAH) is a sudden and unexpected event that may be related to internal factors related to the patient. Whether SAH is related to external and environmental factors is still to be determined. Every now and then, conflicting reports pop up in the literature regarding the association of aneurysm rupture and lunar cycle, humidity, weather, and atmospheric pressure.</P>We decided to analyze the literature on external environmental factors and their relationship with aneurysm rupture.</P><h5>Lunar Cycle</h5> Ali et al. ( 1 ) looked at the records of 111 patients with ruptured aneurysms over a 5-year period. The date of the aneurysm rupture was matched with the corresponding season and moon phase. An incidence peak of aneurysm rupture was seen during the new moon phase. In contrast, no seasonal variation in the incidence of SAH was observed. The authors concluded that the lunar cycle seems to affect the incidence of intracranial aneurysm rupture, with the new moon associated with an increased risk of aneurysmal SAH.</P>Lahner et al. ( 5 ) investigated the impact of the lunar cycle on the incidence of aneurysmal SAH. They retrospectively reviewed all patients admitted to the hospital with aneurysmal SAH from 1992 through 2004. The http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png World Neurosurgery Elsevier
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