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Table 2 Acute coronary syndrome (ACS) in patients with co‐existing cardiovascular disease in critical care blood transfusion threshold trials. Diagnosis made by Investigator (I) or Clinician (C)

From: Anemia and blood transfusion in the critically ill patient with cardiovascular disease

Author, year

Population

Blinded y/n

Diagnosis of ACS

Incidence of new ACS

de Almeida, 2015 [27]

Major abdominal cancer surgery

Y (I)

Clinical symptoms suggesting myocardial ischemia with ≥ 1 of the following:

increase/decrease in cTnI (≥1 value > 99th centile upper reference limit);

EKG changes: new Q waves, ST elevation, new LBBB;

Image‐based evidence of new loss of viable myocardium

R: 0/22

L: 0/12

Hebert, 1999 [9]

General ICU

? (I)

Unclear

*

Holst, 2014 [11]

Septic shock

Y (I)

Symptoms, EKG signs, or elevated biomarker levels resulting in an intervention

R: 6/75

L: 2/66

Walsh, 2013 [14]

Older, mechanically ventilated

N (C)

Troponin rise, new EKG change

R: 1/17

L: 0/15

  1. *All complications, including shock, myocardial infarction, unstable angina and cardiac arrest, with the exception of acute pulmonary edema (9 vs. 18%; p < 0.01), were comparable in both groups (p > 0.05). LBBB left bundle branch block, R restrictive, L liberal, Tn troponin, EKG electrocardiogram