Deadly heart attacks are more common on a Monday

The headline is misleading. The actual study proved that the recorded date of admission to hospital in Ireland with ST-segment elevation myocardial infarction was increased on a Sunday and Monday. Increased admissions on a Monday is not that unusual given that people often seek medical attention after the weekend but maybe more surprising is the increase on a Sunday. https://heart.bmj.com/content/109/Suppl_3/A78

Staffing tends to be lower on weekends AFAIK, could it be triggered by extra stress from not getting proper care during the weekend?

Another possible factor could be the fact that doctors tend to make more mistakes during operations on Fridays compared to start of week.

Not for a STEMI specifically, it’s one of two ECG patterns even a radiologist like me knows how to read. This is a stronger argument for other diseases. Door to balloon target in STEMI is 90 minutes.

STEMI centers (this is picked up by EMS and these ambulances are redirected to appropriate centers) have 24/7 cath lab coverage and any major one will have an ER bypass even during afterhours to expedite care.

In fact more and more hospitals (and all the major ones) announce a “Code STEMI” overhead either when the ambulance is dispatched or as soon as the ECG showing ST elevations is discovered in triage/ER to activate the team and reduce door-to-balloon time.