Dalteparin vs Unfractionated Heparin For The Prevention Of Venous Thromboembolism (VTE) In Hospitalized Acutely Ill Medical Patients

Inclusion Criteria: * Aged greater than or equal to 18 years * Acute medical condition with a projected hospitalization of greater than or equal to 4 days and had less than or equal to 3 days of prior immobilization for more than two thirds of the day * Acute congestive heart failure Class III-IV per NHYA/ Acute respiratory failure not requiring mechanical ventilation or Both * Acute infection without septic shock/ Acute episode of inflammatory bowel disease/ Acute rheumatologic disorders/ Acute lumbar pain or sciatica or vertebral compression with at least one risk factor for VTE Exclusion Criteria: * Contraindications to use of anticoagulants * Active bleeding or abnormal coagulation tests * Recent (less than 1 month) head injury, hemorrhagic stroke, cerebral tumor or intracranial aneurysm or ischemic stroke within the last month. * Major surgical or invasive procedure within the last month resulting in ongoing convalescence * Lumbar or spinal puncture within last 48 hours * S creatinine levels more than 2 * On inotropic agents