Researchers have discovered a new factor contributing to the hatred of Mondays: a higher likelihood of serious heart attacks occurring on this day. This evidence was recently presented at the British Cardiovascular Society conference. The study analyzed data from 10,528 patients in Ireland and Northern Ireland who were admitted to the hospital between 2013 and 2018 with a type of heart attack known as ST-segment elevation myocardial infarction (STEMI). This specific type of heart attack involves a complete blockage of one of the heart’s main supply arteries and has a fatality rate between 2.5% and 10% within 30 days, according to the Cleveland Clinic.
The researchers analyzed the days of the week when patients were admitted and discovered a strong correlation between the start of the workweek and the incidence of STEMI. Cardiologist Jack Laffan notes that more than 1,650 patients arrived at the hospital on a Monday, resulting in a 13% higher risk of this severe heart attack occurring on that day. While STEMI admissions were also above average on Sundays, it was not statistically significant. This suggests that the added stress of returning to work after the weekend may be a contributing factor. Although the study did not explore the reasons behind these findings, Laffan suggests a possible circadian element based on previous research.
According to Harvard Health, “circadian misalignment” occurs when people’s behavior or environment is out of sync with their internal clock. This phenomenon may explain the rise in heart attack rates on Monday mornings and the week after daylight savings time begins. A 2017 study in Sweden also showed a greater incidence of heart attacks on Mondays, with added stress being a potential factor, as suggested by the authors. British Heart Foundation medical director Nilesh Samani is calling for further research to explore the specific factors of certain days of the week that make severe heart attacks more likely. Samani believes that understanding these factors can lead to advancements in saving lives in the future. (Read more heart attack stories.)
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