Title:The Role of Shear Stress in Coronary Artery Disease
Volume: 23
Issue: 22
Author(s): Gerasimos Siasos*, Vasiliki Tsigkou, Ahmet Umit Coskun, Evangelos Oikonomou, Marina Zaromitidou, Lilach O. Lerman, Amir Lerman and Peter H. Stone
Affiliation:
- Cardiovascular Division, Harvard Medical School, Brigham and Women’s Hospital, Boston, US
- 3rd Department of Cardiology, School of Medicine, Sotiria Chest Disease Hospital, National and Kapodistrian University of Athens, Athens, Greece
Keywords:
Endothelial shear stress, Coronary artery disease, Inflammation, Plaque progression, Coronary epicardial endothelial dysfunction, Coronary microvascular endothelial dysfunction, Hemodynamics.
Abstract: Coronary artery disease is the leading cause of morbidity and mortality worldwide, especially
in developed countries, with an increasing incidence in developing countries. Despite the advances
in cardiology, there are yet many unanswered questions about the natural history of coronary
atherosclerosis. However, it has not been fully explained why some coronary artery plaques remain
quiescent over time, whereas others evolve to a high-risk, “vulnerable” plaque with a predisposition
to destabilize and induce a cardiac event. Furthermore, approximately half of the patients with acute
coronary syndromes demonstrate no prior symptoms of ischemia or angiographically evident disease.
Recent findings have indicated that apart from cardiovascular risk factors, genetics, and other
unknown factors, local hemodynamic forces, such as endothelial shear stress, blood flow patterns,
and endothelial dysfunction of the epicardial and microvascular coronary arteries, are associated
with the progression of coronary plaque and the development of cardiovascular complications with
complex interactions. In this review article, we summarize the mechanisms that affect coronary artery
plaque progression, indicating the importance of endothelial shear stress, endothelial dysfunction
of epicardial and microvascular vessels, inflammation, and their complex associations, underlying
in parallel the clinical perspectives of these findings.