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Insight to the pathophysiology of stable angina pectoris
Dimitris Tousoulis1, Emmanuel Androulakis, Anna Kontogeorgou
11st Cardiology Department, Hippokration Hospital, Athens University Medical School, Greece. drtousoulis@hotmail.com
Insights
Chronic stable angina, a common emergency room presentation, stems from myocardial ischemia due to atherosclerosis. Understanding its complex pathophysiology, including endothelial dysfunction and microvascular issues, remains crucial for effective treatment.
Area of Science:
- Cardiology
- Vascular Biology
- Pathophysiology
Background:
- Atherosclerosis is a chronic inflammatory vascular disease.
- Myocardial ischemia, causing angina pectoris, results from oxygen supply-demand imbalance.
- Chronic stable angina is a frequent emergency room complaint linked to myocardial ischemia without necrosis.
Purpose of the Study:
- To explore the pathophysiology of chronic coronary syndrome.
- To highlight the role of endothelial dysfunction and microvascular coronary dysfunction in anginal chest pain.
- To investigate the impact of atherosclerotic plaques and vascular remodeling on coronary flow and symptoms.
Main Methods:
- Review of current data on atherosclerosis and myocardial ischemia.
- Analysis of the role of endothelial dysfunction in early atherogenesis.
- Examination of microvascular coronary dysfunction in non-obstructive coronary artery disease.
- Investigation of the effects of atherosclerotic plaques and vascular remodeling on coronary flow.
Main Results:
- Endothelial dysfunction is an early event in atherosclerosis.
- Microvascular coronary dysfunction is implicated in anginal chest pain without obstructive coronary artery disease.
- Atherosclerotic plaques and multivessel obstructions affect coronary flow.
- Vascular remodeling contributes to stable angina and claudication.
Conclusions:
- The pathophysiology of chronic coronary syndrome involves complex interactions.
- Endothelial and microvascular dysfunction are key contributors to angina.
- Further research is needed to fully elucidate the mechanisms of chronic coronary syndrome.
Abstract:
Atherosclerosis is a chronic disease which mainly represents an inflammatory response in the vessels. Myocardial ischemia manifested by angina pectoris can be either acute or chronic and usually is a result of imbalance between myocardial oxygen supply and myocardial oxygen demand. Chronic stable angina is chest discomfort attributed to myocardial ischemia without the presence of necrosis and is the most common symptom encountered by emergency room physicians. A growing amount of data has shown that endothelial dysfunction, is now considered an important early event in the development of atherosclerosis, while in the absence of angiographically obstructive coronary artery disease, anginal chest pain is often attributed to microvascular coronary dysfunction. Moreover, atheroma formation and in turn, atherosclerotic plaques seem to affect coronary flow, given that multivessel flow-limiting obstructions are observed in patients with chronic coronary syndrome. Morphological changes of diseased arteries related to significant atherosclerosis, such as vascular remodeling may also result in stable angina or claudication. However, several issues with respect to the comprehension of the pathophysiology of the chronic coronary syndrome have not been fully elucidated.
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