HIP Fracture Accelerated Surgical TreaTment and Care TracK 2 Trial

Inclusion Criteria:

1. age ≥45 years;

2. diagnosis of hip fracture during working hours with a low-energy mechanism requiringsurgery;

3. troponin elevation ( at least one troponin measurement above the upper limit ofnormal occurring from the time of hip fracture to the time of randomization); and

4. informed consent.

Exclusion Criteria:

1. taking a therapeutic dose of an anticoagulant for which no reversing agent isavailable and the anesthesiologist or surgeon believe surgery within 6 hours ofeligibility criteria met would not be safe;

2. patients on a therapeutic vitamin K antagonist with a history of heparin inducedthrombocytopenia (HIT);

3. patients with peri-prosthetic fracture, open fracture or bilateral fractures;

4. patients requiring an emergency surgery for another reason (e.g., subduralhematoma);

5. patients with acute myocardial infarction deemed to be clinically unstable, with amechanical complication (i.e., acute papillary muscle rupture, ventricular septaldefect), ST elevation myocardial infarction, or cardiogenic shock;

6. patients refusing consent; or

7. patients previously enrolled in HIP ATTACK-2.