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https://www.emdocs.net/pocus-findings-of-hemodynamically-unstable-pe-with-cardiac-arrest/

"POCUS findings of RV strain may not be visualized with POCUS echocardiography until more than 50% of the pulmonary artery outflow track is obstructed."

Is this concept clear to your trainees/ residents? And to your colleagues as well? I'm hearing too often "no signs of PE on bedside echo": that's an element to consider, yes, but that's not a definitive test of exclusion..