I've used it often enough I suppose.
It doesn't work if you're super sick.
I'm not sure some of the posters in this thread understand "massive" with regards to PE is defined by clinical manifestations NOT the size of the clot on imaging.
I'm also surprised to see the surgeons taking "stablish" patients to the OR. Different cultures. Now, that's a study that would be nice to see, but would be hard to make it past an IRB, especially since tPA for sub-massives is really pretty equivocal IMHO, surgery vs usual care in sub-massive PE. I'd also like to see some pooled data from the centers that just put these folks right on ECMO. I like ECMO for massive PE.