Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

84 questions · 88 findings · 12 reviews

No studies found 10 · 11.4%GRADE not reported 1 · 1.1%Very low 16 · 18.2%Low 40 · 45.5%Moderate 20 · 22.7%High 1 · 1.1%

Perioperative beta‐blockers vs placebo or usual care

Early all‐cause mortality (within 30 days) · adults undergoing non‐cardiac surgery under general anaesthesia (to include: low‐risk, medium‐risk, and high‐risk surgeries)

Perioperative beta‐blockers showed no clear difference in early all‐cause mortality (within 30 days) compared with placebo or standard care (low certainty).

1 finding from 1 review

Perioperative beta‐blockers vs placebo or usual care

Myocardial infarction (0 to 30 days) · adults undergoing non‐cardiac surgery under general anaesthesia (to include: low‐risk, medium‐risk, and high‐risk surgeries)

Perioperative beta‐blockers may leads to lower acute myocardial infarction (within 30 days) compared with placebo or standard care (low certainty).

1 finding from 1 review

Perioperative beta‐blockers vs placebo or usual care

Cerebrovascular events (within 30 days) · adults undergoing non‐cardiac surgery under general anaesthesia (to include: low‐risk, medium‐risk, and high‐risk surgeries)

Perioperative beta‐blockers showed no clear difference in cerebrovascular events (within 30 days) compared with placebo or standard care (low certainty).

1 finding from 1 review