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Changes in coagulation factors following acute myocardial infarction in man
Insights
Acute myocardial infarction shortens whole blood clotting time and alters coagulation factors. Fibrinogen, factors VIII, IX, and XI increased, while factor XII decreased post-infarction.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Clinical Coagulation
Background:
- Acute myocardial infarction (AMI) is a critical cardiovascular event.
- Coagulation system alterations may play a role in AMI pathogenesis and outcomes.
Purpose of the Study:
- To investigate serial changes in coagulation parameters following AMI.
- To compare coagulation profiles in AMI patients versus those with similar symptoms but no infarction.
Main Methods:
- Serial measurements of whole blood clotting time, plasma fibrinogen, and coagulation factors (II, V, VII, VIII, IX, X, XI, XII).
- Study included 14 patients with AMI and 6 control patients over 10 days.
Main Results:
- Whole blood clotting time was significantly shorter within 24 hours post-AMI.
- AMI patients showed increased fibrinogen, factors VIII, IX, and XI.
- A significant decrease in factor XII was observed in AMI patients.
- Control patients exhibited no significant changes in measured coagulation factors.
Conclusions:
- AMI is associated with acute, significant alterations in the coagulation cascade.
- Specific coagulation factors and clotting time changes may serve as biomarkers for AMI.
Abstract:
The whole blood clotting time, plasma fibrinogen and individual coagulation factors II, V, VII, VIII, IX, X, XI, and XII were serially measured in 14 patients over a 10-day period following acute myocardial infarction. A further six patients with similar symptoms but without evidence of myocardial infarction were also studied. The whole blood clotting time was significantly shorter within the first 24 h after infarction than on subsequent days. There were significant increases in the levels of fibrinogen and of factors VIII, IX, and XI and a significant decrease in factor XII in the patients who had sustained a myocardial infarction. The patients without myocardial infarction had no significant change in any of the coagulation factors measured.
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