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.
I hear ya about the frustrations of getting the INR to stabilize after a surgery. I had two surgeries done in 2011 and it took months to settle down after that. Course, the fact that I was on and off anti-biotics afterwards didn't help either.
Yeah, that would make me crazy too. I'd want to figure out a different approach my doc. At least with a lab, you're in and out, no appointment.