Prolonged Fasting Increases Risk Of Rare Type Of Stroke

Armen Hareyan's picture

Fasting during the month of Ramadan raises the risk of a rare type of stroke.

Over one billion Muslims fast worldwide during the month of Ramadan. Other studies have shown that fasting during Ramadan does not affect the rate of arterial stroke. This study looked at cerebral venous sinus thrombosis (CVST), a rare type of stroke that most often affects young adults and children and is more common in women.


For the study, researchers included all people with CVST strokes admitted to three hospitals in Isfahan, Iran, over a five-year period. Of the 162 people, 33 had strokes while fasting; 129 had strokes during the other months of the year. The average number of strokes during the month of Ramadan was 5.5, compared to 2.0 during the rest of the year. The average age and percentage of men versus women was the same in the two groups.

"These results need to be confirmed by other studies, but they should be looked at carefully," said study author Mohammad Saadatnia, MD, of Isfahan University of Medical sciences. "Coexistence of usual risk factors, such as oral contraceptive and coagulopathic disorders, along with dehydration in patients while prolonged fasting can be the reason for increased susceptibility to CVST. People and their physicians need to be aware of possible complications of prolonged fasting."

"In conclusion, according to results of our study, it seems that healthy people have no problem with regard to CVST while fasting, but susceptible persons, such as those with hypercoagulable states and women who take oral contraceptive pills, may be at increased risk for CVST, and their physician should be aware of possible mentioned complication in susceptible persons while fasting," said Saadatnia. "These results and hypothesis need to be confirmed by other studies."