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Plasma beta-thromboglobulin in patients with valvular heart disease with or without valve replacement: relationship
Insights
Plasma beta-thromboglobulin (BTG) levels are elevated in valvular heart disease patients, particularly those with a history of thromboembolism. Further research is needed to confirm BTG
Area of Science:
- Cardiology
- Hematology
- Biochemistry
Background:
- Valvular heart disease (VHD) can lead to platelet count and retention abnormalities.
- Plasma beta-thromboglobulin (BTG) is a marker of platelet activation.
Purpose of the Study:
- To investigate plasma BTG levels in patients with VHD before and after valve replacement surgery.
- To assess the relationship between BTG levels, prosthetic valve type, and history of thromboembolism.
Main Methods:
- Plasma BTG levels were measured in 132 VHD patients.
- Patients were categorized based on pre- or post-surgery status, prosthetic valve type (mechanical vs. bioprosthesis), and history of thromboembolism.
- BTG levels were compared to a control group.
Main Results:
- VHD patients exhibited increased BTG levels compared to controls.
- No significant difference in BTG levels was found between patients with mechanical valves versus no prosthesis.
- BTG levels were significantly higher in patients with a history of thromboembolism.
Conclusions:
- Plasma BTG may serve as a valuable indicator in VHD management.
- BTG evaluation warrants further investigation in prospective studies for VHD patients.
- Elevated BTG in VHD patients with thromboembolism history suggests a role in thrombotic events.
Abstract:
Plasma beta-thromboglobulin (BTG) was measured in 132 patients with valvular heart disease: 43 were studied before, 89 after surgery (78 mechanical valves and 11 bioprostheses). In this group of 89 selected patients, a history of thromboembolism was present in 53 (5 of them had bioprosthesis). Some abnormalities have been observed in patients with valvular heart disease as compared with controls: decreased platelet count and retention on glass column, and increased BTG. There is no statistically significant difference in BTG level between patients with (m +/- SD: 62.4 +/- 42.0 ng ml-1), or without (59.5 +/- 41.0 ng ml-1) a prosthesis; in the small series of 11 patients with a bioprosthesis, BTG was slightly lower than in other patients (44.5 +/- 14.1 ng ml-1), but still higher than in controls (26.8 +/- 13.3 ng ml-1). In the patients with a history of thromboembolism, BTG was significantly higher (66.7 +/- 47.9 ng ml-1 than in patients without this complication (49.9 +/- 21.0 ng ml-1). Thus, BTG evaluation may have some value in valvular heart disease but, at present, it should be confined to systematic research including prospective studies.
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