Today, we're discussing two groundbreaking studies from 2024 that challenge our understanding of β-blocker therapy for secondary prevention after myocardial infarction, or MI.Let's start with a Swedish study Beta-Blockers after Myocardial Infarction and Preserved Ejection Fraction | New England Journal of Medicine that included over 5,000 patients with normal left ventricular ejection fraction after an MI

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. The researchers compared long-term beta-blocker therapy with no beta-blocker treatment. Surprisingly, after 3.5 years, there was no significant difference in the primary endpoint of all-cause death or recurrent MI between the two groups

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. This suggests that for patients with preserved heart function after an MI, long-term beta-blocker use may not provide additional benefits.

Now, let's turn to a French study involving 3,700 patients who were already on β-blockers following an MI Beta-Blocker Interruption or Continuation after Myocardial Infarction | New England Journal of Medicine

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. This trial compared continuing β-blocker therapy to stopping it. After three years, the results showed a slightly higher incidence of adverse events in the group that stopped β-blockers, primarily due to more hospitalizations for cardiovascular reasons

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.What do these studies tell us? Well, they suggest that the benefits of β-blockers might be more modest in our current era of advanced revascularization techniques and modern medical therapies for post-MI patients

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. However, it's crucial to note that the Swedish study focused on low-risk patients with normal heart function and they say well there was a lower event rate than expected!!! That is EXPECTED WHEN THE OTHER MEDICATIONS WORK!!!

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.It's important to remember that these findings don't necessarily apply to all post-MI patients. Those with reduced heart function or other specific indications may still benefit significantly from β-blocker therapy

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.In conclusion, while these studies provide valuable insights, there are other trials currently being done to help us better answer this question of what to do with the betablocker post mi