Related Experiment Videos
[Thrombocyte activity in dilatative cardiomyopathy and latent cardiomyopathy compared to coronary heart disease]
Insights
Platelet and thrombin activity markers, beta-thromboglobulin (beta TG) and fibrinopeptide A (FPA), were elevated in patients with dilatative cardiomyopathy (DCM) and coronary heart disease (CHD) during exercise. These markers correlated with angina severity in DCM patients.
Area of Science:
- Cardiology
- Pathophysiology
- Biochemistry
Background:
- Myocardial hypoxia is a key factor in various heart conditions.
- Platelet and thrombin activity play crucial roles in cardiovascular pathomechanisms.
Purpose of the Study:
- To compare platelet and thrombin activity in patients with angina pectoris, dilatative cardiomyopathy (DCM), latent cardiomyopathy (LCM), and coronary heart disease (CHD).
- To investigate the relationship between these activities and exercise-induced angina.
Main Methods:
- Measured plasma beta-thromboglobulin (beta TG) and fibrinopeptide A (FPA) at rest and after maximal exercise in 46 patients and 15 healthy controls.
- Utilized comparative analysis to differentiate activity levels across patient groups and with normal subjects.
Main Results:
- Beta TG and FPA levels were significantly higher in DCM and CHD patients compared to normal subjects, particularly during exercise.
- Elevated beta TG during exercise correlated with angina severity in DCM patients, but not in CHD patients.
- LCM patients showed no significant difference in beta TG or FPA compared to normal subjects.
Conclusions:
- Increased platelet and thrombin activity are implicated in the pathophysiology of DCM and CHD.
- Exercise exacerbates these prothrombotic states in patients with these conditions.
- The findings suggest potential therapeutic targets for managing myocardial hypoxia and angina.
Abstract:
In a comparative study on the pathomechanism of myocardial hypoxia we determined a parameter each of platelet activity and thrombin activity in 46 patients with angina pectoris, i.e., 15 patients with dilatative cardiomyopathy (DCM), 15 patients with latent cardiomyopathy (LCM) and 16 patients with coronary heart disease (CHD) compared to 15 normal subjects (N). beta-thromboglobulin (beta TG) and fibrinopeptide A (FPA) were measured both at rest (I) and after symptom-limited maximal exercise (II) in plasma. In N, beta TG was not increased in any case, neither at rest nor on exertion (I: 20.5 +/- 6.1 ng/ml, II: 22.4 +/- 6.7 ng/ml). Patients with LCM did not differ significantly from N (I: 20.9 +/- 6.1 ng/ml, II: 22.7 +/- 7.9 ng/ml). beta TG values of some patients with DCM and CHD were increased at rest and especially under exercise (DCM I: 27.9 +/- 9.6 ng/ml, vs. N p less than 0.025; II: 49.9 +/- 45.5 ng/ml, vs. N p less than 0.01; CHD I: 25.2 +/- 7.7 ng/ml, vs. N p less than 0.05; II: 38.6 +/- 34.3 ng/ml, vs. N p less than 0.01). Patients with DCM developing significant angina under exercise showed a higher beta TG under these exercise conditions than those with mild or no angina (p less than 0.01). In patients with coronary heart disease, this correlation was not to be found. With regard to FPA the four investigated groups differed in an analogous way, as they did with regard to beta TG; but only a weak correlation within both values was shown.(ABSTRACT TRUNCATED AT 250 WORDS)