Massive” and “Submassive” Replaced by Clinical Categories: The first-ever AHA/ACC clinical practice guideline on acute pulmonary embolism drops a new A-to-E severity classification.
Key Shift:
The guideline abandons “Massive” and “Sub-massive” labels.
Instead, it uses clinical severity categories (A–E) to better stratify risk and guide therapy.
This improves clarity for front-line clinicians and aligns PE care with modern risk-based management.
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