Key result
Cardiopulmonary bypass surgery induced significant intraoperative activation of the fibrinolytic system (e.g., increased EFA and t-PA, P<0.002), followed by a postoperative fibrinolytic shutdown.
Why the study?
Does cardiopulmonary bypass surgery alter fibrinolytic activity in patients with valvular heart disease or atrial septal defects?
Observational (n=100)
Does cardiopulmonary bypass surgery alter fibrinolytic activity in patients with valvular heart disease or atrial septal defects?
Cardiopulmonary bypass surgery is associated with an initial intraoperative activation of the fibrinolytic system followed by a postoperative shutdown.
Answers are grounded in this paper and cite their sources.
CPB surgery was associated with intraoperative fibrinolytic activation and postoperative shutdown; Level 3 data leaves open effects on bleeding risk or targeted interventions.
The influence of cardiopulmonary bypass (CPB) on fibrinolytic activity was assessed in 100 patients with valvular heart disease or atrial septal defects. Euglobulin fibrinolytic activity (EFA), tissue type plasminogen activator (t-PA) activity, plasminogen activator inhibitor 1 (PAI-1) activity, plasminogen, alpha 2-antiplasmin (alpha 2-AP), fibrinogen degradation products (FDP), and D-dimer were measured pre-, intra-, and postoperatively. There were significant increases in EFA and t-PA activity (p less than 0.002), and decreases in plasminogen and alpha 2-AP (p less than 0.0001) intraoperatively with respect to baseline values. t-PA activity decreased significantly after surgery (p less than 0.002), whereas PAI-1 activity showed a marked increase shortly after operation and on postoperative day 1 (p less than 0.0001). FDP and D-dimer levels were significantly increased both intra- and postoperatively, the latter showing higher values (p less than 0.01 and p less than 0.0001, respectively). This study shows that there is an activation of the fibrinolytic system, as a result of the increased activation of plasminogen and decreased levels of plasmin inhibitors, during CPB surgery followed by a postoperative fibrinolytic shutdown.
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Páramo et al. (2009) conducted an observational in Valvular heart disease or atrial septal defects (n=100). Cardiopulmonary bypass (CPB) surgery vs. Baseline (preoperative) was evaluated on Fibrinolytic activity markers (EFA, t-PA, PAI-1, plasminogen, alpha 2-AP, FDP, D-dimer). Cardiopulmonary bypass surgery induced significant intraoperative activation of the fibrinolytic system (e.g., increased EFA and t-PA, P<0.002), followed by a postoperative fibrinolytic shutdown.
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