Background: The Pesi/sPesi are well validated clinical scores for the risk stratification of pulmonary embolism (PE) patients. While studies have found these scores to be a useful tool predicting both short and long-term mortality for higher risk patients, their ability to predict the need for escalation therapy among intermediate risk PE patients has not been evaluated.
Methods: We evaluates 203 consecutive intermediate risk PE patients admitted to the Sheba Medical Center ICCU. Patients were stratified to Low (Pesi<2, sPesi-0) and high (Pesi≥3, sPesi-1) Pesi/sPesi score. Escalation therapy was defined as one or several of the following: the need for reperfusion therapy (both surgical and thrombolysis), ionotropic agents, mechanical ventilation, and in-hospital as well as 90 days mortality.
Results: PE patients with higher Pesi/sPesi scores were older (72.4ֲ±11.1 vs 57.4ֲ±17.4, p<0.001), and had a higher incidence of malignancy (32% vs 3%, p<0.001). There was no significant difference in Troponin and D dimer levels (0.69ֲ±1.5ng/ml vs 1.15ֲ±2.16ng/ml, p=0.08, 3947ֲ±7678ng/ml vs 4638ֲ±7900ng/ml, p=0.56 respectively). No significant difference in the incidence of RV dilation on CTA (56.2% vs 57.8%, p=0.933) and moderate or severe RV dysfunction on echocardiography (44.6% vs 43.4%, p=0.983). There was a trend toward a higher need for escalation therapy in the high Pesi/sPesi group (7.6% vs 16.5%, p=0.091).
Conclusion: In PE patients at intermediate risk, patients with a higher Pesi/sPesi score demonstrated a trend towards a higher need for escalation therapy. Larger studies may provide further insight to the usefulness of the PESI score for prediction of the need for escalation therapy.