Why do serious heart attacks happen on Mondays?

Health By Chetana Belagere 24/11/2023 Read the article

A study by doctors in Ireland showed that serious heart attacks are more likely to happen at the start of the working week than at any other time.

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Dr Deepak Krishnamurthy says: “There are certain times when people are more likely to get heart attacks; on Mondays, early mornings, and winters.”

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Dr Laffan, who led the study, noted that the most likely time for a cardiovascular event is between 6 am and 10 am, when cortisol and other hormones rise as people wake up.

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Doctors say the body’s circadian rhythm causes a surge in stress hormones like cortisol and adrenaline in the morning, leading to higher blood pressure and heart rate.

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Blood pressure naturally peaks in the morning and blood tends to be more concentrated and viscous, raising the risk of clot formation.

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The “Blue Monday” effect might be associated with factors like alcohol consumption too, adds Dr Krishnamurthy.

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A 2005 review of 28 studies covering 16 countries and more than 1.6 million cardiac events also found a higher occurrence on Mondays.

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Cardiologists say further investigation is needed to unravel the specifics behind the increased risk on Mondays.

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