Imagine a doctor rushing to save a life. They reach for a rulebook that tells them exactly what to do. But what if that rulebook is mostly full of guesses? A new study looked at the official advice for treating heart attacks, known as ST-elevation myocardial infarction, from top global heart societies between 1990 and 2023. They checked 2,139 specific rules about drugs and other treatments used in the hospital.
The results were startling. Only 17.7% of the advice was backed by strong evidence. A huge chunk, 30.1%, came from low-quality studies. Even the middle ground, 28.9%, relied on moderate evidence that isn't quite solid. Interestingly, advice about medicines was slightly better backed than advice about other treatments, but the overall picture is still weak.
This matters because patients deserve the best care possible, not just the most common care. The study did not find any safety issues, but the main problem is that we are flying blind in many areas. We need stronger research to turn these shaky rules into firm facts that truly save lives.