Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: The purpose of this trial is to determine whether a conservative or a liberal blood transfusion strategy is better for patients with a heart attack and a low blood count.


Options:
A: Inclusion Criteria:

* Patients ≥ 70 years of age scheduled for intermediate- or high-risk non-cardiac surgery will be registered
* Registered patients will be randomised only if they indeed develop severe anaemia (if Hb level falls ≤ 9 g/dl) during surgery (=day 0) or day 1, 2, or 3 after surgery

Exclusion Criteria:

* preoperative Hb level ≤ 9 g/dl
* chronic kidney disease requiring dialysis
* suspected lack of compliance with follow-up procedures
* participation in other interventional trials
* expected death within 3 months
* inability to provide informed consent with absence of a legally authorised representative/ legal guardian
* temporary inability to provide informed consent
* previous participation in our trial
* patients who are prevented from having blood and blood products according to a system of beliefs (e.g. Jehovah's Witnesses)
* preoperative autologous blood donation.
B: Inclusion Criteria:

All of the following must be present:

* Acute myocardial infarction with presentation within 72 hours of randomization (acute myocardial infarction is defined as ischemic-type chest discomfort lasting at least 30 minutes associated with creatinine kinase MB (CKMB) or troponin \>upper limit of normal \[ULN\])
* Admission to CCU
* Hematocrit .30 or less
* Written, informed consent

Exclusion Criteria:

* Inability or unwillingness to receive red cell transfusions
* Active bleeding (overt blood loss accompanied by a decrease in hematocrit of at least 5% in the preceding 12 hours)
* Receipt of red cell transfusion within 7 days of randomization
* Prior severe transfusion reaction
* Pregnancy
* Imminent death
* Decision to provide limited care
* Age \<21
* Participation in another clinical trial in which blood transfusion is a requirement or a component of a primary or secondary endpoint
* Previous participation in the CRIT Pilot
C: Inclusion Criteria:

* All primary and reoperative adult cardiac surgical patients undergoing cardiopulmonary bypass for coronary artery bypass grafting, coronary artery bypass grafting with a valve procedure, isolated valve procedures and ascending aortic repair for aneurysm or dissection procedures.

Exclusion Criteria:

* Age less than 18 years
* Congenital procedures
* Emergencies
* descending thoracic aortic aneurysm repairs
* Left or right ventricular assist devices
* Left ventricular aneurysm resections
* Heart or lung transplantation
* Those unable to receive blood for religious reasons
D: Inclusion Criteria:

* Age equal to or greater than 18 years
* Moderate or severe traumatic brain injury, defined as Glasgow coma scale less than or equal to 12 at hospital admission
* Hemoglobin lower than 9.0 g/dL within 7 days from hospital admission

Exclusion Criteria:

* Glasgow coma scale equal to 3 with dilated pupils bilaterally
* Previous neurological sequelae
* Pregnant women
* Jehovah's Witnesses
* Hemorrhagic shock at randomization
* Moribund patients
* Unable to provide consent

Answer: B