1. Two studies examined the prevalence of pulmonary embolism (PE) in patients hospitalized for syncope and found a prevalence of 3.75% in one study but less than 1% in a larger retrospective study, suggesting the first study had a high rate of false positives. 2. A randomized controlled trial found that administering IV antibiotics in ambulances to patients with suspected infection did not reduce mortality compared to usual care with IV fluids and oxygen alone. 3. The evidence supporting components of the MONA (Morphine, Oxygen, Nitrates, Aspirin) approach for suspected cardiac chest pain is limited, with no clear evidence that routine oxygen or morphine administration improves outcomes.