Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

92 questions · 92 findings · 16 reviews · Heart

No studies found 7 · 7.6%GRADE not reported 0 · 0%Very low 26 · 28.3%Low 29 · 31.5%Moderate 27 · 29.3%High 3 · 3.3%

Remote ischaemic preconditioning (RIPC) vs no RIPC

Composite endpoint (including all‐cause mortality, non‐fatal myocardial infarction and/or any new stroke assessed at 30 days after surgery) · people undergoing CABG (with or without valve surgery)

RIPC showed no clear difference in composite endpoint (including all‐cause mortality, non‐fatal… compared with no RIPC (moderate certainty).

1 finding from 1 review

Intervention not reported

Coronary artery bypass graft surgery · Free‐living adults who were healthy, had established cardiovascular disease or risk factors for cardiovascular disease

The review found no eligible studies for this question.

1 finding from 1 review

Beta‐blockers vs placebo, no treatment or surveillance only

Clinically important non‐fatal end point as defined byShores 1994(aortic dissection, aortic regurgitation, congestive heart failure, or cardiovascular surgery) · people with confirmed diagnosis of Marfan syndrome

Beta‐blockers showed no clear difference in clinically important non‐fatal end point as defined byShores… compared with placebo, no treatment or surveillance only (low certainty).

1 finding from 1 review

Transmyocardial laser revascularization vs medical treatment

Early postoperative mortality Deaths in the 30 days after surgery · patients with refractory angina

Transmyocardial laser revascularization showed no clear difference in early postoperative mortality Deaths in the 30 days after surgery compared with medical treatment (high certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Mortality within the longest · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids showed no clear difference in all‐cause mortality (during the index hospital admission, or within… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Cardiac complications (as defined by study authors, including cardiac compromise and fatal and non‐fatal myocardial infarction, defined as ECG changes, echocardiological changes, or disproportionate elevation of troponins, during the index hospita... · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids may leads to higher cardiac complications (as defined by study authors, including… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Pulmonary complications (as defined by study authors, including pneumonia, embolism, reduced pulmonary function, prolonged ventilation, and pleural effusion, during the index hospital admission) · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids may leads to lower pulmonary complications (as defined by study authors, including… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Infectious complications · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids may leads to lower infectious complications (as defined by study authors, including… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Gastrointestinal bleeding · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids showed no clear difference in gastrointestinal (GI) bleeding (as defined by study authors,… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Renal failure · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids showed no clear difference in renal failure (as defined by study authors, including dialysis,… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review