Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.
That would show what they did or did not do.
(You have to request them, they don't offer them.)
I can usually go online and see the results of tests, etc, but for ER visits they don't seem to do that.