Related Experiment Video
Updated: Jun 30, 2026

Hemocompatibility Testing of Blood-Contacting Implants in a Flow Loop Model Mimicking Human Blood Flow
Published on: March 5, 2020
[Changes in coagulation hemostasis in patients after coronary bypass surgery]
Insights
Coronary bypass surgery patients show increased hypercoagulation and suppressed fibrinolysis post-operation. Extended anticoagulant therapy and hemostasiogram monitoring are crucial for managing these hemostatic changes.
Area of Science:
- Cardiovascular Surgery
- Hemostasis and Thrombosis
- Clinical Coagulation
Context:
- Investigates hemostatic changes in patients undergoing coronary artery bypass grafting (CABG).
- Compares coagulation profiles before and after surgery in patients versus healthy controls.
- Focuses on alterations in the coagulation system following CABG procedures.
Purpose:
- To analyze the impact of CABG on the coagulation link of hemostasis.
- To identify specific hemostatic disorders present before and after surgery.
- To evaluate the role of anticoagulant therapy and monitoring post-CABG.
Summary:
- Pre-operative ischemic heart disease patients exhibited hyperfibrinogenemia, suppressed fibrinolysis, thrombinemia, and elevated D-dimer.
- Post-CABG, patients showed significantly increased hypercoagulation and further fibrinolytic suppression.
- A decrease in protein C system anticoagulants was observed post-surgery.
Impact:
- Highlights the necessity for prolonged anticoagulant use in the postoperative period.
- Emphasizes the importance of continuous hemostasiogram monitoring after discontinuing anticoagulants.
- Provides insights into managing thrombotic risks associated with CABG surgery.
Abstract:
Changes in the coagulation link of hemostasis were studied in 37 patients who had undergone coronary bypass surgery using venous and arterial conduits and in 16 healthy individuals of the same age. The recordings of hemostasiograms were examined before and 14 days after surgery. Prior to coronary bypass surgery, the patients with ischemic heart disease were found to have coagulation hemostatic disorders as moderate hyperfibrinogenemia, fibrinolytic suppression, thrombinemia, and elevated D-dimer concentrations. Postoperatively, hypercoagulation substantially increased with suppressed fibrinolysis and decreased anticoagulants in the protein C system. In this connection, it is necessary to longer use anticoagulants in the postoperative period and to thoroughly monitor hemostasiogram recordings after their discontinuance.
Related Concept Videos
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Introduction to Hemostasis
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Coagulation
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
Coagulation
