Abstract:
BACKGROUND:Few studies investigated the relationship between fibrinolysis abnormalities and residual pulmonary perfusion defects after acute pulmonary embolism (PE). OBJECTIVE:To assess the fibrinolytic profile in patients with prior PE in relation to the extent of scintigraphically detectable residual perfusion abnormalities. PATIENTS AND METHODS:We studied 71 consecutive patients with a prior episode of PE, who were examined after one year of the incident embolic event, and at least one month after anticoagulation withdrawal. They underwent lung scintigraphy to assess the recovery of pulmonary perfusion, echocardiography and chest radiography to look for signs of pulmonary hypertension. Clot formation and lysis were evaluated by two turbidimetric methods: Clot and Lysis Assay and Clot Lysis Time. We also measured the in vitro plasmin-mediated lysis of fibrin from purified fibrinogen, and the circulating levels of fibrinolytic inhibitors. The sample was split in two categories based on the extent of residual perfusion defects: <10% (n=53), ≥ 10% (n=18). RESULTS:Patients with perfusion defects >10% had significantly longer lysis time (p<0.05), and higher levels of plasminogen activator inhibitor-1 (p<0.01) than those with perfusion defects <10%. The time interval between symptoms onset and PE diagnosis (time-to-diagnosis) was significantly longer in patients with perfusion defects >10% than in the others (p=0.005). In multivariate logistic regression, both lysis time and time-to-diagnosis were independently associated with perfusion defects >10% (p<0.001). None of the sampled patients had echocardiographic or radiologic signs of pulmonary hypertension. CONCLUSION:Prolonged time-to-diagnosis and fibrinolysis imbalance are independent predictors of incomplete perfusion recovery after acute PE.
journal_name
Thromb Resjournal_title
Thrombosis researchauthors
Lami D,Cellai AP,Antonucci E,Fiorillo C,Becatti M,Grifoni E,Cenci C,Marcucci R,Mannini L,Miniati M,Abbate R,Prisco Ddoi
10.1016/j.thromres.2014.07.013subject
Has Abstractpub_date
2014-09-01 00:00:00pages
737-41issue
3eissn
0049-3848issn
1879-2472pii
S0049-3848(14)00388-0journal_volume
134pub_type
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