Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

175 questions · 179 findings · 20 reviews

No studies found 14 · 7.8%GRADE not reported 1 · 0.6%Very low 29 · 16.2%Low 81 · 45.3%Moderate 41 · 22.9%High 13 · 7.3%

Intervention not reported

Hypotension (within 30 days; as defined by study authors, minimum systolic blood pressure < 90 mmHg or requiring medication) · adults undergoing cardiac surgery under general anaesthesia

The intervention showed no clear difference in hypotension (within 30 days; as defined by study authors, minimum… (low certainty).

1 finding from 1 review

Beta‐blockers vs control—cardiac surgery

All‐cause mortality (30 days)—cardiac surgery · patients with coronary heart disease and/or valvular heart disease

Beta‐blocker showed no clear difference in all‐cause mortality (30 days)—cardiac surgery compared with control—cardiac surgery (moderate certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

Cerebrovascular events—non‐cardiac surgery · patients with conditions requiring non‐cardiac surgery

Beta‐blocker showed no clear difference in cerebrovascular events—non‐cardiac surgery compared with control—non‐cardiac surgery (low certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

Ventricular arrhythmias—non‐cardiac surgery ECG · patients with conditions requiring non‐cardiac surgery

Beta‐blocker showed no clear difference in ventricular arrhythmias—non‐cardiac surgery ECG compared with control—non‐cardiac surgery (moderate certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

All supraventricular arrhythmias—non‐cardiac surgery ECG · patients with conditions requiring non‐cardiac surgery

Beta‐blocker leads to lower all supraventricular arrhythmias—non‐cardiac surgery ECG compared with control—non‐cardiac surgery (high certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

Bradycardia—non‐cardiac surgery ECG · patients with conditions requiring non‐cardiac surgery

Beta‐blocker probably leads to higher bradycardia—non‐cardiac surgery ECG compared with control—non‐cardiac surgery (moderate certainty).

1 finding from 1 review

Beta‐blockers vs control—cardiac surgery

Acute myocardial infarction—cardiac surgery · patients with coronary heart disease and/or valvular heart disease

Beta‐blocker showed no clear difference in acute myocardial infarction—cardiac surgery compared with control—cardiac surgery (moderate certainty).

1 finding from 1 review

Beta‐blockers vs control—cardiac surgery

Ventricular arrhythmias—cardiac surgery ECG · patients with coronary heart disease and/or valvular heart disease

Beta‐blocker probably leads to lower ventricular arrhythmias—cardiac surgery ECG compared with control—cardiac surgery (moderate certainty).

1 finding from 1 review

Beta‐blockers vs control—cardiac surgery

All supraventricular arrhythmias—cardiac surgery ECG · patients with coronary heart disease and/or valvular heart disease

Beta‐blocker leads to lower all supraventricular arrhythmias—cardiac surgery ECG compared with control—cardiac surgery (high certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

All‐cause mortality (30 days)—non‐cardiac surgery · patients with conditions requiring non‐cardiac surgery

Beta‐blocker showed no clear difference in all‐cause mortality (30 days)—non‐cardiac surgery compared with control—non‐cardiac surgery (low certainty).

1 finding from 1 review

Beta‐blockers vs control—non‐cardiac surgery

Acute myocardial infarction—non‐cardiac surgery · patients with conditions requiring non‐cardiac surgery

Beta‐blocker leads to lower acute myocardial infarction—non‐cardiac surgery compared with control—non‐cardiac surgery (high certainty).

1 finding from 1 review