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Role of infections in atherosclerosis
1Division of Infectious Diseases, Department of Medicine, Helsinki, Finland.
Insights
Infections, including bacteremic and chronic types like Chlamydia pneumoniae, are increasingly recognized as significant risk factors for atherosclerotic diseases such as heart attack and stroke.
Area of Science:
- Cardiovascular Medicine
- Infectious Diseases
- Pathogenesis of Atherosclerosis
Background:
- Epidemiologic, experimental, and clinical studies increasingly link infections to atherosclerotic diseases.
- Bacteremic infections, with or without endocarditis, elevate the risk of stroke and myocardial infarction.
- Chronic infections, including Chlamydia pneumoniae and dental infections, are implicated in atherosclerotic disease development.
Purpose of the Study:
- To review the evidence linking infections to atherosclerotic diseases.
- To explore the potential role of infections in the etiopathogenesis of atherosclerosis.
- To discuss the complex and multifactorial mechanisms underlying the infection-atherosclerosis association.
Main Methods:
- Review of existing epidemiologic, experimental, and clinical evidence.
- Analysis of the association between various types of infections and atherosclerotic outcomes.
- Discussion of proposed pathogenetic mechanisms.
Main Results:
- Infections are established risk factors for acute myocardial infarction and cerebral infarction.
- Chronic bacterial infections may contribute to the atherosclerotic process itself.
- Mechanisms linking infection and atherosclerosis are complex, multifactorial, and patient-specific.
Conclusions:
- Infection is a significant risk factor for atherosclerotic diseases, acting both independently and synergistically with traditional risk factors.
- The role of infection in atherosclerosis is complex and warrants further investigation.
- Understanding these mechanisms is crucial for developing novel prevention and treatment strategies for cardiovascular events.
Abstract:
A growing amount of epidemiologic, experimental, and clinical evidence has linked infection as a risk factor to variousatherosclerotic diseases including acute myocardial infarction and cerebral infarction. Bacteremic infections with and without endocarditis carry a high risk for both stroke and acute myocardial infarction. During the last decade, chronic bacterial infections such as Chlamydia pneumoniae and dental infections have been associated as risk factors for various atherosclerotic diseases. These chronic bacterial infections are risk factors for acute cardiovascular events, but they may also have some role in the etiopathogenesis of atherosclerotic process itself. There are many known mechanisms that might explain the observed association of infection and atherosclerotic diseases, but it is probable that these mechanisms are complex and multifactorial and probably differ from infection to infection and from patient to patient. Infection theory is by no means against classic risk factor theory in the etiopathogenesis of atherosclerosis. Infection may also act as a synergistic risk factor together with classic risk factors in the development of various atherosclerotic diseases.