A study at the BCS conference in Manchester 2023 reveals that serious heart attacks are more likely on Mondays. Researchers analyzed over 10,000 records from 2013 to 2018, noting a 13% increase in STEMI cases at the week's start. The exact cause is unclear but may involve circadian rhythms and work-related stress.A study at the BCS conference in Manchester 2023 reveals that serious heart attacks are more likely on Mondays. Researchers analyzed over 10,000 records from 2013 to 2018, noting a 13% increase in STEMI cases at the week's start. The exact cause is unclear but may involve circadian rhythms and work-related stress.