Table 1.

CTEPH Prediction Score; a Score of More Than Six Points Denotes a high risk.

Points for Score	Score
Unprovoked pulmonary embolism	+6
Known hypothyroidism	+3
Symptom onset greater than 2 weeks before pulmonary embolism diagnosis	+3
Right ventricular dysfunction on CT or echocardiogram	+2
Known diabetes mellitus	−3
Thrombolytic therapy or embolectomy	−3

A Score greater than six points denotes a “high risk” for CTEPH.