Study of Early Systolic Notching in Suspected Pulmonary Embolism Cases

Everyone's new favorite doppler marker for pulmonary embolism is back! We discussed the ESN (early systolic notching) when this concept was first introduced as a marker for large PEs, but now we have a prospective study that improves upon some of the limitations of the past article...or does it?

https://www.ultrasoundgel.org/115
https://pubmed.ncbi.nlm.nih.gov/33987920/