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Platelet function related to the development and presenting symptoms in coronary artery disease. An epidemiological
Insights
Platelet function, measured by retention, was lower in men with angina. This suggests symptoms, not coronary heart disease itself, link to platelet function and may influence blood pressure regulation during exercise.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Exercise Physiology
Background:
- Platelet function plays a role in cardiovascular health.
- Coronary heart disease (CHD) is a significant health concern in middle-aged men.
- Understanding factors influencing CHD and exercise response is crucial.
Purpose of the Study:
- To investigate the relationship between platelet function and coronary heart disease (CHD) in apparently healthy men.
- To explore the link between platelet function, angina symptoms, and exercise-induced blood pressure changes.
Main Methods:
- Studied platelet function using Hellem's retention method in 488 men aged 40-59.
- Coronary angiography was used to confirm CHD diagnosis in suspected cases.
- Assessed blood pressure during maximal bicycle exercise tests.
Main Results:
- Platelet responsiveness was significantly lower in men with angina pectoris compared to those without, irrespective of angiographic findings.
- Men with very low platelet retention values exhibited higher peak exercise blood pressure.
- No significant differences in platelet retention were observed between men with confirmed CHD without angina and healthy controls.
Conclusions:
- Presenting symptoms like angina, rather than the presence of CHD itself, appear linked to altered platelet function.
- Platelet function may influence blood pressure regulation mechanisms during strenuous physical activity.
- Further research is warranted to elucidate the precise role of platelets in exercise hemodynamics and cardiovascular disease.
Abstract:
Among 2014 apparently healthy men aged 40-59 years platelet function was studied with Hellem's retention method in 488 men. In 55 of these 488 men coronary heart disease (CHD) was strongly suspected and coronary angiography confirmed the diagnosis in 34 of 51 angiographied men. Platelet responsiveness was significantly lower among those who had angina pectoris than among their CHD-suspect counterparts without angina, regardless of coronary angiographic findings. Since angiopositive men without angina and 408 "normals" had similar retention values, it seems as if presenting symptoms, but not the development of CHD are linked to platelet function. During a near maximal bicycle exercise test significantly higher peak exercise blood pressure was found among men with very low retention values than among men with retention values in the middle and upper range. This could not be explained by differences in maximal heart rate or work performance. This indicates that blood pressure regulation during exercise may in part be linked to platelet function related mechanisms.