Cardiovascular Risk in Systemic Sclerosis

Abstract

Systemic sclerosis (SSc) is a systemic inflammatory, autoimmune disorder characterized by diffuse fibrosis of the skin and visceral organ involvement. Endothelial dysfunction and microvascular injury dominate the pathophysiology and clinical manifestations of the disease, while the impact of macrovascular atherosclerotic disease on cardiovascular (CVD) morbidity and mortality is yet to be established. In this article, we aim to review current knowledge about CVD as well as cardiac complications in SSc and discuss the potentially implicated pathogenetic mechanisms. Systemic inflammation has been identified as an important trigger and contributor for the development and progression of atherosclerosis, closely associated with high cardiovascular mortality in patients with autoimmune disorders, such as rheumatoid arthritis. A close interplay between traditional risk factors and factors related to the disease, including inflammation, endothelial injury, and immune-mediated cytotoxicity, sharing common pathogenetic features with microvasculopathy, may be responsible for large-vessel involvement and promotion of atherosclerosis in SSc. Cardiac complications, including heart failure due to impairment of coronary microcirculation and myocardial fibrosis, are listed among the primary cause of death in SSc. Evaluation of indirect surrogate markers of CVD, namely, arterial stiffness, carotid media thickness, and flow-mediated dilation, in small studies has provided inconsistent results regarding the association between SSc and atherosclerosis, highlighting the need for further research on this field. In this article, we aim to review current knowledge about large-vessel involvement and CVD in SSc and discuss the potentially implicated pathogenetic mechanisms. SSc conveys a higher risk for CVD associated with both vascular and fibrotic complications during the course of the disease. Increasing attention is given on the use of vasodilators, immunosuppressants, and more recently antifibrotic drugs that potentially improve myocardial function and reduce atherosclerotic disease burden.