A study on the risk factors of coronary artery disease in patients with Takayasu arteritis
Original Article

A study on the risk factors of coronary artery disease in patients with Takayasu arteritis

Yang Wang1, Shu-Jie Jia1, Yun Zhou1, Jing Li1, Xin Zhao1, Quan-Ming Zhao1#, Guan-Lin Yang2#

1Department of Special medical, 2Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China

Contributions: (I) Conception and design: Y Wang, QM Zhao, GL Yang; (II) Administrative support: QM Zhao, GL Yang; (III) Provision of study materials or patients: Y Wang, SJ Jia, Y Zhou, J Li, X Zhao; (IV) Collection and assembly of data: Y Wang, SJ Jia, Y Zhou, J Li, X Zhao; (V) Data analysis and interpretation: Y Wang, QM Zhao, GL Yang; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors.

#These authors contributed equally to this work.

Correspondence to: Quan-Ming Zhao. Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, No.2 of Anzhen Road, Chaoyang District, Beijing 100029, China. Email: zhaoqm36547@163.com; Guan-Lin Yang, Department of Cardiology, Liaoning University of Traditional Chinese Medicine, No.79 of Chongshan East Road, Huanggu District, Shenyang 110032, China. Email: yanggl98547@tom.com.

Background: The aim of this study was to investigate the risk factors of Takayasu arteritis (TA) involving the coronary artery.

Methods: Patients with TA involving coronary artery were included in this study. According to the patients’ condition of coronary artery involvement, they were divided into two groups: group A: TA involved coronary artery disease [at least one coronary artery stenosis (≥50%)] and group B: TA did not involve coronary artery. A logistic regression model was used to analyze the risk factors of arteritis involving the patients’ coronary artery lesions.

Results: A total of 442 TA patients were included in this study. The patients were significantly older in group A than those patients in group B (52.54±11.17 vs. 37.73±12.72, P<0.001). The age of onset in group A was significantly older than those patients in group B (42.21±11.46 vs. 32.74±13.13, P<0.001). The patients in group A had a longer course of disease (P<0.001), larger BMI (P=0.002) and higher rates of smoking, drinking, diabetes, dyslipidemia (P<0.05) when compared with group B. The level of eGFR was significantly decreased and the UA and TG levels were significantly increased in group A when compared with group B(P<0.05). Besides, the risk factors for TA involving coronary artery included the age of TA onset (OR =1.143, 95% CI: 1.007–1.298, P=0.039), course of TA (OR =1.165, 95% CI: 1.025–1.324, P=0.020), and BMI (OR =1.100, 95% CI: 1.021–1.185, P=0.013).

Conclusions: The later the age of TA onset, the longer the course of TA onset and the more traditional risk factors associated with atherosclerosis, the more vulnerable patients are to coronary artery involvement and this may not be related to clinical disease activity.

Keywords: Takayasu arteritis (TA); coronary artery disease; risk factors; inflammatory; coronary artery stenosis

Submitted Jan 08, 2020. Accepted for publication Mar 20, 2020.

doi: 10.21037/jtd-20-267


Takayasu arteritis (TA) is a chronic, granulomatous, full-thickness arteritis of an unknown etiology. The disease mainly involves the aorta and its main branches, such as the aortic arch, carotid artery, subclavian artery, abdominal aorta, and renal artery. The secondary branches of the aorta, such as the pulmonary artery and coronary artery, can also be involved. Inflammation develops from the outer membrane to the inner membrane leading to thickening, stenosis or occlusion of the involved vascular wall and thrombosis, while the destruction of the elastic layer and muscular layer can lead to aneurysms, dissections, and other diseases (1). TA was first reported by a Japanese ophthalmologist at the 12th Annual Meeting of the Japan Ophthalmology Society held in 1908 in Fukuoka, Mikito Takayasu (2). Arteritis is a systemic disease and its treatment includes medical treatment and surgical treatment. The medical treatment mainly includes anti-inflammatory treatment to control infection, hormone therapy, immunotherapy, vasodilator drugs to improve blood circulation in brain and limb, and antiplatelet drugs, etc. The surgical treatment includes percutaneous endovascular angioplasty and surgical treatment, such as artificial vascular reconstruction, intimal thrombectomy, etc.

The pathogenesis of TA is not clear and is mainly classified as an inflammatory disease. At present, genetic factors, autoimmune cells, and antibody-mediated immune response infections such as Mycobacterium tuberculosis, Chlamydia pneumoniae, and sex hormones may be related to the disease. The main mechanism of TA involvement in coronary artery stenosis is that the inflammation of the aorta extends to the opening and near the segment of the coronary artery, leading to intimal hyperplasia and the fibrosis contracture of the middle and outer membrane causes the stenosis of the lumen. However, there are many studies that suggest that in TA patients with coronary artery disease, it is not simply caused by inflammation (3-5). Previous studies have also shown that (6) the average wall thickness of the ascending aorta in patients with coronary stenosis is thicker than that in patients without coronary stenosis. With the increase of age, the late coronary stenosis may be caused by the contraction of the inflammatory tissue and calcium deposition. There are also studies that show that vascular calcification is not only related to inflammation but also to age and the use of glucocorticoids (7). It has been found that LP (a) in TA patients is significantly increased (8). At present, the relative contribution of specific risk factors is still uncertain, therefore, it is very important to further study and determine the risk factors and clinical characteristics of TA involving coronary artery disease, identify high-risk groups early, and give effective intervention measures early to improve the prognosis of TA patients.

We, therefore, conducted this study to explore the risk factors of TA involvement in coronary artery disease and provided a theoretical basis for early prevention and clinical treatment.


This study was conducted in accordance with the declaration of Helsinki. This study was conducted with approval from the Ethics Committee of Beijing Anzhen Hospital, Capital Medical University. Written informed consent was obtained from the participants.


Patients with TA involving the coronary artery were included in this study. The diagnosis standard of aortitis was according to the 1990 American Rheumatology Association (ACR) diagnosis standard of aortitis (9). The assessment of the patients’ arteritis activity was according to the NIH standard (10). According to the patients’ condition of coronary artery involvement, they were divided into two groups: group A: TA involved coronary artery disease [at least one coronary artery stenosis (≥50%)] and group B: TA did not involve the coronary artery. This study was approved by the ethics committee of our hospital and all patients signed informed consent.

Inclusion and exclusion criteria

Inclusion criteria: (I) patients who were diagnosed as TA; (II) patients with at least one coronary artery stenosis ≥50%; (III) age was older than 18-years-old; (IV) patients who had signed informed consent. Exclusion criteria: (I) patients with severe infections; (II) patients with severe liver or kidney dysfunction; (III) patients with severe coagulation dysfunction;(IV) patients whose data was incomplete; (V) patients with congenital heart diseases, such as coarctation of aorta, fibromuscular dysplasia, pulmonary heart disease, etc.; (VI) patients with systemic inflammatory diseases, such as rheumatoid arthritis, systemic lupus erythematosus or other primary and secondary vascular diseases; (VII) patients with malignant tumor, hematological system disease, and other acute and chronic infections.

The main observational index

In this study, we recorded the patients’ age, gender, height, weight, body mass index (BMI), smoking history, diabetes history, hypertension history, history of dyslipidemia, and family history of cardiovascular disease. Besides, blood pressure, heart rate, heart rate, vascular murmur was also recorded.

The patients’ blood index: venous blood was drawn in the early morning of the next day after hospitalization (fasting ≥8 hours), blood routine was detected by an automatic blood analyzer, ESR was detected by srs100/II, hsCRP was detected by immunoturbidimetry (Beckman AU5400), and hsCRP was detected by Beckman AU5400. The biochemical indexes were analyzed by a biochemical analyzer: serum creatinine (SCR), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), and triglyceride (TG). The evaluation index of coronary artery disease was completed by coronary angiography or CTA. All patients received color Doppler echocardiography and left ventricular ejection fraction (LVEF) and the results were recorded.

Statistical analysis

We used the software program SPSS 20.0 (IBM, Chicago, USA) to conduct the statistical analysis. Continuous variables were expressed as mean± SD and discontinuous variables were expressed as a percentage (%). For two comparisons, each value was compared by a t-test when each datum conformed to a normal distribution while the non-normally distributed continuous data were compared using non-parametric tests. The counting data were tested by a chi-square test. The risk factors of TA involvement in coronary artery disease were analyzed by a multivariate logistic regression model and a value of P<0.05 was considered statistically significant.


General data

A total of 442 TA patients were included in this study. The average age was 41.92±13.99 years. The patients included 80 males (18.1%) and 362 females (81.9%). The ratio of men to women was approximately 1:4.5. Compared with group B, group A was older (52.54±11.17 vs. 37.73±12.72, P<0.001), had a later onset (42.21±11.46 vs. 32.74±13.13, P<0.001),longer (5.0 vs. 1.0, P<0.001), had a larger BMI (24.17±3.31 vs. 22.99±3.92, P=0.002), and had a higher proportion of smoking, drinking, diabetes, and dyslipidemia. The prevalence rate was higher and the difference between the two groups was statistically significant (all P<0.05); the proportion of heart murmur and vascular murmur was more evident in the patients’ physical signs and the difference between the two groups was statistically significant (P<0.001); there was no statistical significance between the two groups in gender, family history of cardiovascular disease, disease activity, and the proportion of applied hormone (P>0.05) (Table 1).

Table 1
Table 1 Comparison of general data between the two groups [x¯±s, n(%)]
Full table

hsCPR, ESR, biochemical indexes, and cardiac function

Compared with group B, the eGFR level in group A was significantly lower (91.96±25.71 vs. 106.49±24.59, P<0.001) and the UA and TG levels were significantly higher (P<0.05), while LDL-C, hsCRP, ESR, and left ventricular ejection fraction (LVEF) had no significant difference between the two groups (P>0.05) (Table 2).

Table 2
Table 2 Comparison of CPR, ESR, biochemical indexes and cardiac function between the two group (x¯±s)
Full table

The multivariate analysis of the risk factors of TA involving the coronary artery

A multiple logistic regression analysis was carried out with the patients’ sex, age, age of onset(first onset of clinical symptoms), course of TA, BMI, smoking history, drinking history, hypertension, dyslipidemia, diabetes mellitus, and disease activity as the independent variables. The results showed that age of onset (OR =1.143, 95% CI: 1.007–1.298, P=0.039), course of TA (OR =1.165, 95% CI: 1.025–1.324, P=0.020), and BMI (OR =1.100, 95% CI: 1.021–1.185, P=0.013) were the risk factors of TA involving the coronary artery (Table 3).

Table 3
Table 3 multiple logistic regression analysis of TA involving coronary artery risk factors
Full table


Cases of TA are found worldwide but it is more common in Asia and the Middle East and the disease is rare. Its prevalence is estimated to be 1–2/1 million in Japan and 2.2/1 million in Corvette. Epidemiological studies from Europe show that the incidence varies from 0.4–1.3/1 million. A recent National Hospital incidence study from Poland showed that the incidence of TA was estimated to be 0.92/1 million per year. TA mostly occurs in young women and the proportion of men and women in different groups around the world is different, mostly 1 (5-11). The age of onset is mainly 5–40-years-old, the peak is 20–30-years-old, and there is a main peak between 15–19-years-old in female patients (11,12). A Japanese study evaluated the clinical characteristics of newly diagnosed TA patients and the disease’ s association with age and gender. The results showed that the male to female ratio of newly diagnosed TA patients was 1:5 and the median age of onset in male patients was significantly higher than that in female patients; 43.5-years-old and 34-years-old, respectively. Approximately 85% of the patients are aortic or including its main branches. Young female patients tend to have localized lesions while male patients often have extensive aortic lesions or aneurysms with more complications. However, local abdominal lesions are relatively common in male patients over 40-years-old (13,14). The incidence of TA involvement in the coronary artery was reported in 10–30% of cases (8,15,16). In this study, 442 patients with TA were included, the ratio of male to female was 1:4.5, and the average age of onset was (35.35±13.37) years. The average age of onset was (34.70±13.66) years for women and (38.37±11.52) years for men. The incidence of coronary artery involvement was approximately 28.2%, which was similar to the abovementioned epidemiological data.

The prognosis of TA is related to the involvement of the patients’ heart, brain, and other important organs, as well as the location of the involved vessels. A survey on the mortality and causes of death of systemic connective tissue diseases and primary systemic vasculitis from Norway showed that the estimated standard mortality of TA was the highest in primary systemic vasculitis and the main causes of death were cardiovascular disease, tumor, chronic respiratory disease, and infection (17). Coronary artery ischemia was also a recognized cause of death in these patients (18). Therefore, it is of great significance to screen the risk factors of coronary artery involvement in TA patients and to take appropriate prevention and control measures to improve the prognosis of TA patients.

The expansion of chronic aortic inflammation to the opening and near segment of the coronary artery can cause the stenosis of the coronary artery lumen and the inflammation leads to the destruction of the elastic fibers of the intima and media of the artery, the weakness of the wall of the artery, and the expansion of the aneurysm (19), which can cause myocardial ischemia. But inflammation is not the only mechanism of TA patients involving coronary artery disease. Previous studies have shown that vascular calcification in TA is not only related to inflammation but also related to age and the use of glucocorticoids (7). Glucocorticoid therapy has a complex relationship with the development of atherosclerosis. Abnormal lipid metabolism, abnormal glucose metabolism, and high blood pressure are significant cardiovascular side effects of glucocorticoid therapy. The effects of glucocorticoid therapy on the lipid spectrum mainly include VLDL, TG, and LDL-C, while HDL-C can be increased or decreased, while the increase of serum cholesterol (mainly LDL-C) is positively correlated with the occurrence of atherosclerosis (20). Therefore, glucocorticoid therapy may be one of the factors that affect coronary artery disease in TA patients (21).

Alarcón García (8) found that LP (a) [Lp (a)] was significantly increased in TA patients and LP (a) had the effect of atherosclerosis, which was a risk factor for cardiovascular disease. Alibaz-Oner et al. (22) used ultrasound to detect flow-mediated dilation (FMD) of the brachial artery to evaluate endothelial dysfunction and to detect intima-media thickness (IMT) of the carotid artery to understand the change of the atherosclerotic structure. The results showed that the FMD in TA patients decreased significantly and CIMT increased, indicating the inflammatory state and blood vessels of TA patients. Inflammation can lead to obvious endothelial dysfunction and can increase the occurrence of atherosclerosis. TA involves the mechanism of coronary artery disease. TA is mainly characterized as an inflammatory disease related to heredity and autoimmunity. The cellular immunity mediated by CD4+ T and CD8+ T cells can promote the formation of granuloma, activate the activity of matrix metalloproteinases and other proteases, promote the release of inflammatory factors such as IFN-α, TNF-α,IL-6, IL-8, and IL-18, and lead to the formation of chronic inflammation and fibrosis of the tube wall (23,24), resulting in the stenosis and occlusion of the lumen. The endothelium also promotes inflammatory changes and increases the permeability of dysfunction.

Low-density lipoprotein cholesterol (LDL-C) in the blood enters the intima and accumulates under the intima, which is the key initial step of atherosclerosis (25). Ox-LDL is an important proinflammatory factor, which can promote the release of MCP-1, TNF-α, IL-8, and other inflammatory mediators from endothelial cells, make monocytes adhere firmly and enter the vascular endothelium, and also stimulate the proliferation of vascular smooth muscle cells, thus, promoting the occurrence of atherosclerosis (26)]. Seyahi et al. (27) found that the incidence of carotid atherosclerotic plaques in TA patients was higher than that in healthy people of the same age and gender group. Plaques were mostly located in the lesions of the vessel wall of primary arteritis and age and high cholesterol level were significantly related to the occurrence of plaques in TA patients. Further analysis showed that age was a risk factor for the occurrence of atherosclerotic plaques in TA patients. It is suggested that the changes of turbulent flow and shear stress in stenosis and the pro-inflammatory changes of endothelium caused by inflammation damage of arterial wall, arterial function or anatomical structure are all related to the development of atherosclerosis in TA patients (28). Soto believes that TA patients with coronary artery disease have a higher prevalence, an older age, and a longer course of disease than in patients without coronary artery disease (29).

Renal dysfunction can activate the Renin-angiotensin-aldosterone system and oxidative stress, increase the synthesis of endothelin and inflammatory factors, increase the production of oxygen free radicals in cells, and often combine with a variety of risk factors such as old age, obesity, smoking history, hypertension, diabetes, dyslipidemia, hyperuricemia, etc., which lead to endothelial dysfunction promoting the atherosclerosis process (30). The results of the multiple logistic regression analysis in this study showed that the age of TA onset, the course of TA, and BMI were independent risk factors of TA involvement in the coronary artery but were not related to the disease activity. It is suggested that long-term chronic vasculitis may lead to coronary artery stenosis in TA patients and autopsy pathological studies show that the inflammatory activity in TA patients is extensive but not active in the clinical manifestations, suggesting that there are some limitations in the current clinical methods in determining the disease activity and the activity is often underestimated (31), while in the clinical disease inactive stage, the vascular disease may still progress (32). The results of this study suggest that the traditional risk factors such as age, dyslipidemia, smoking, etc. are closely related to TA involvement in coronary artery disease. These results also showed that the later the onset age, the more susceptible patients are in developing coronary artery involvement. This further suggests that the older the patient’s age, on the one hand, combined with various risk factors, various physical and chemical factors easily lead to coronary artery endothelial damage, while on the other hand, the inflammatory damage of TA itself, both of which jointly promote the progress of coronary lesions. These findings are similar to those of Soto and other research reports.

Limitations. There were several limitations to this study. Firstly, this trial was only a retrospective study and not a randomized controlled trial. Secondly, this study was only a single-center trial and the sample size was limited. Thirdly, the clinical follow-up was short, and it was necessary to observe the clinical long-term prognosis. In the future, we will try to carry out another multi-center, prospective research with a large sample size and an in-depth study of the risk factors of TA coronary artery involvement and explore the relevant mechanisms to provide more theoretical bases for better prevention and treatment of TA coronary artery disease.

In summary, this study showed that the occurrence and development of TA patients' involvement in coronary artery disease are multifactorial. Besides inflammation, traditional risk factors also play an important role, which may promote the occurrence of atherosclerosis in patients with a systemic inflammatory disease or the interaction between TA inflammation itself and traditional risk factors of cardiovascular disease may promote the progress of coronary artery disease. It is suggested that we be alert in recognizing the involvement of coronary artery, screen coronary artery lesions on time, and pay close attention to the comprehensive control of the traditional risk factors while controlling inflammation, which is very important in improving the prognosis of TA in patients.


Funding: National Natural Science Foundation of China, No. 81974548.


Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/jtd-20-267). The authors have no conflicts of interest to declare.

Ethical Statement: The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. This study was conducted with approval from the Ethics Committee of Beijing Anzhen Hospital, Capital Medical University (IRB number: XXXXXXXXXXX). Written informed consent was obtained from the participants.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0/.


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Cite this article as: Wang Y, Jia SJ, Zhou Y, Li J, Zhao X, Zhao QM, Yang GL. A study on the risk factors of coronary artery disease in patients with Takayasu arteritis. J Thorac Dis 2020;12(5):2031-2038. doi: 10.21037/jtd-20-267