(NEW YORK) — A large new study conducted in Spain and Italy found that beta blockers, drugs often used to slow the heart rate and lower blood pressure, did not provide clear benefits for heart attack patients whose hearts were still functioning well.

The results of the study, known as REBOOT, were published in the New England Journal of Medicine on Saturday and presented during the European Society of Cardiology Congress 2025 in Madrid, Spain.

The REBOOT trial enrolled more than 8,400 patients recovering from a heart attack whose heart function was above 40% and assigned them to either take a beta blocker or no beta blocker within two weeks of leaving the hospital.

Over the course of approximately 3.7 years, there was no significant difference when it came to rates of death from any cau

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