Increased Risk of Ischemic Stroke in Systemic Sclerosis: A National Cohort Study of US Veterans

The risk of major adverse cardiovascular events in patients with systemic sclerosis: a nationwide, population-based cohort study

OBJECTIVE

The objective of this study was to assess the incidence and risk factors of major adverse cardiovascular events (MACEs) in patients with systemic sclerosis (SSc).

METHODS

We conducted a nationwide, population-based, cohort study using Taiwan's National Health Insurance Research Database. We performed propensity score matching (PSM) using a 1:2 ratio, resulting in inclusion of 1379 patients with SSc and 2758 non-SSc individuals in the analysis. We assessed the association between SSc and MACEs, using the multivariable Cox proportional hazard regression model with adjustment of time-dependent covariates, and investigated risk factors for MACEs in patients with SSc, shown as adjusted hazard ratios (aHRs) with 95% CIs.

RESULTS

SSc was not significantly associated with the risk of MACEs (aHR 1.04; 95% CI 0.77-1.42). Nevertheless, SSc was associated with increased risk of myocardial infarction [incidence rate ratio (IRR) 1.76; 95% CI 1.08-2.86] and peripheral arterial occlusion disease (IRR 3.67; 95% CI 2.84-4.74) but not of ischaemic stroke (IRR 0.89; 95% CI 0.61-1.29). Factors independently associated with MACEs in SSc patients included age (aHR 1.02), male gender (aHR 2.01), living in a suburban area (aHR 2.09), living in a rural area (aHR 3.00), valvular heart disease (aHR 4.26), RA (aHR 2.14), use of clopidogrel (aHR 26.65), and use of aspirin (aHR 5.31).

CONCLUSIONS

The risk of MACEs was not significantly increased in Taiwanese patients with SSc, and our investigation effectively identified the factors independently associated with MACEs in SSc patients. Additionally, patients with SSc exhibited higher risks of myocardial infarction and peripheral arterial occlusion disease but not of ischaemic stroke.

Association between systemic sclerosis and risk of cerebrovascular and cardiovascular disease: a meta-analysis

We aimed to evaluate the association between systemic sclerosis (SSc) and major cerebrovascular/cardiovascular risks through a systematic approach. Databases were systematically searched from their inception to October 10, 2023 for studies comparing cerebrovascular/cardiovascular event rates between patients with SSc and controls. The primary outcome was the stroke risk in patients with SSc. Secondary outcomes included risk of myocardial infarction (MI), cardiovascular disease (CVD), peripheral vascular disease (PVD), and venous thromboembolism (VTE). Seventeen studies with 6,642,297 participants were included. SSc was associated with a significantly increased risk of stroke (HR, 1.64; 95% confidence interval [CI], 1.35-2.01), CVD (HR, 2.12; 95% CI, 1.36-3.3), MI (HR, 2.15; 95% CI, 1.23-3.77), VTE (HR, 2.75; 95% CI, 1.77-4.28), and PVD (HR, 5.23; 95% CI, 4.25-6.45). Subgroup analysis revealed a significantly increased stroke risk in the non-Asian group (HR, 1.55; 95% CI, 1.26-1.9), while the Asian group displayed a higher but not statistically significant risk (HR, 1.86; 95% CI, 0.97-3.55). The study found that SSc is associated with a significantly increased risk of cerebrovascular/cardiovascular events. These findings highlight the importance of vasculopathy in SSc and suggest the need for enhanced clinical monitoring and preventive measures in this high-risk population.

Outcomes of hemorrhagic stroke in patients with autoimmune rheumatic diseases: An analysis of the US Nationwide Inpatient Sample

AIM

To determine whether and how rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), and systemic sclerosis (SSc) affect outcomes in patients admitted for hemorrhagic stroke.

METHODS

This study screened the Nationwide Inpatient Sample database for adults aged ≥20 years admitted to US hospitals with a principal diagnosis of intracerebral hemorrhage (ICH) between 2005 and 2018. Diagnoses were determined using the International Classification of Diseases, 9th and 10th revisions (ICD-9 and ICD-10) diagnostic codes for ICH (ICD-9: 431, 432; ICD-10: I61, I62). Study outcomes were: (1) in-hospital mortality; (2) unfavorable discharge, defined as transfer to nursing homes or long-term care facilities; and (3) prolonged length of stay (LOS), defined as LOS >75th centile.

RESULTS

Associations between comorbid RA, SLE, and SSc and clinical outcomes show a significantly lower risk of in-hospital mortality and prolonged LOS in RA patients. After admissions for ICH, the risk for in-hospital mortality and prolonged LOS was decreased in RA patients, and the risk for unfavorable discharge (long-term care) was reduced in SLE patients.

CONCLUSIONS

Among patients admitted to US hospitals for hemorrhagic stroke, patients with RA had decreased risk for in-hospital mortality and prolonged LOS.

Spectrum of Cerebrovascular Disease in Scleroderma: A Case Series and Systematic Review

INTRODUCTION

Central nervous system involvement in scleroderma has traditionally been considered uncommon. Recent studies suggest that scleroderma might be associated with an increased risk of cerebrovascular disease (CBVD), independent of conventional cardiovascular risk factors. We present a case series and a systematic review to capture the spectrum of CBVD in scleroderma, through a detailed description of clinical, demographic, laboratory, and radiographical findings.

METHODS

In our case series, we included consecutive patients with scleroderma and CBVD seen over 35 years by our group in different hospitals in the USA. We also performed a systematic review from inception to July 2022. MEDLINE/Embase/WoS were searched for "scleroderma", "systemic scleroderma", "systemic sclerosis", "cerebrovascular", "stroke", "cerebrovascular disorders", "cerebrovascular disease".

RESULTS

Fourteen patients with scleroderma and CBVD were included in our case series (mean age 48 years, 85% female). CBVDs were ischemic stroke (64%), hemorrhagic stroke (7%), venous thrombosis (7%), ischemic optic neuropathy (7%), probable ischemic stroke (14%). Of the 110 studies identified in our systematic review (45,484 patients), 82 reports with patient-level data were included for quantitative analysis (93 patients, mean age 48 years, 79% female). Despite 16 different CBVD types identified, ischemic stroke was the most common CBVD (29%), followed by vasculopathy (20%), hemorrhage (12%), vasculitis (11%), and intracranial aneurysm (11%).

CONCLUSION

Our relatively large case series combined with a systematic review of CBVD in SCL patients shows a heterogeneous spectrum of CBVD etiology, with acute ischemic stroke being the most common in our cases and in our literature review. A complex interaction between chronic inflammation, autoimmune mechanisms, and endothelial dysfunction seems to underlie the CBVD heterogeneity in scleroderma patients. This review informs clinicians about the spectrum of CBVD related to scleroderma and raise awareness about scleroderma being a possible risk factor for early-onset CBVD.

Inorganic Dust Exposure During Military Service as a Predictor of Rheumatoid Arthritis and Other Autoimmune Conditions

OBJECTIVE

Rheumatoid arthritis (RA) and other autoimmune (AI) conditions are associated with inorganic dust exposure. Many military activities are likely to entail inorganic dust exposures. We wished to identify associations between prior military dust exposure and RA and other AI conditions.

METHODS

We studied persons from a roster of Army, Navy, Air Force, or Marine Corps personnel who had served in Operation Enduring Freedom and Operations Iraqi Freedom and New Dawn. We linked military occupational codes to a job exposure matrix assigning dust exposure likelihood. We used the Veterans Affairs Health Care System (VAHCS) electronic health care records to identify cases of RA, systemic lupus erythematosus (SLE), systemic sclerosis (SSc), vasculitis, and inflammatory myositis. Generalized estimating equations modeled risk of RA and other AI conditions associated with dust exposure, taking into account military service branch, age at first VAHCS encounter, sex, race/ethnicity, smoking status, and years of military service.

RESULTS

Of 438 086 veterans (68% ever-smokers), 44% were classified with likely or somewhat likely dust exposure. Cases included 1139 cases with RA, 467 cases with SLE, and 180 cases with other AI diseases (SSc, vasculitis, or inflammatory myositis). Military dust exposure was associated with increased odds of RA (odds ratio [OR] = 1.10; 95% confidence interval [CI] = 1.003-1.20) and increased odds of SSc, vasculitis, or inflammatory myositis (OR = 1.23; 95% CI = 1.14-1.34) but was protective for SLE (OR = 0.81; 95% CI = 0.76-0.88).

CONCLUSION

Dust exposure during past military service comprises an occupational and environmental risk factor for RA and other AI diseases. This is potentially relevant for prevention activities.

Arterial evaluation of systemic sclerosis patients with Doppler ultrasound: What did we find?

AIM

The aim of this study was to detect macrovascular findings in systemic sclerosis (SSc) by means of color Doppler ultrasonography (CDUS) and to evaluate the relationship between the laboratory and clinical findings in the setting of the disease.

METHODS

This was a cross-sectional study. Eighty-eight patients were included in the study. CDUS examinations of the bilateral carotid, vertebral, and peripheral arteries were performed. The presence of macrovascular involvement was investigated and recorded, and its relationships with the clinical, laboratory, and cardiovascular risk factors were evaluated.

RESULTS

An atheromatous plaque was found in 67.7% of the 1936 arteries examined by CDUS. Of these 1936 arteries, 37.4% demonstrated a narrowing of the intraluminal diameter. On the other hand, the carotid intima-media thickness (CIMT) was found to have increased in 55.7% of the patients. This increase was found to be statistically correlated with disease duration, the modified Rodnan Skin Thickness Score, and the Medsger Disease Activity Score. But no relation existed with the disease subtype, age, or cardiovascular risk factors. Arterial occlusion was detected in 10 patients. An association was found between the CIMT values and arterial occlusion.

CONCLUSIONS

In this study, we examined the arteries by means of CDUS, and we detected structural alterations in the peripheral and carotid arteries. We witnessed that these macrovascular changes had a close association with certain features of SSc. We think there is a need for broader prospective studies in order to evaluate the contribution of these factors to the macrovascular changes stated in the article.

The role of aspirin in the primary prevention of accelerated atherosclerosis in systemic autoimmune rheumatic diseases

Aspirin is the most commonly used medication worldwide. Beside its well-known anti-inflammatory effects, a role has emerged in the prevention of cardiovascular events. However, a significant benefit has been demonstrated in secondary cardiovascular prevention only, while there is limited evidence supporting a role in primary prevention. This discrepancy might depend on the that so far, the high-risk populations that will achieve the greatest benefits yet experiencing minimal harmful side effects have not been identified. Patients with autoimmune systemic rheumatic diseases have an increased risk of cardiovascular complications compared with the general population, which makes aspirin of potential value in these subjects. Moving from general aspects of aspirin pharmacology and specific issues in general population, the aim of this study is to review the evidence about the role of low-dose aspirin in primary cardiovascular prevention in autoimmune systemic rheumatic diseases.

Systemic sclerosis and risk of cardiovascular disease: A PRISMA-compliant systemic review and meta-analysis of cohort studies

BACKGROUND

Systemic sclerosis (SSc) is an autoimmune disorder leading to extensive fibrosis and microvascular injury. Macrovascular disease is well documented in other autoimmune rheumatic diseases such as systemic lupus erythematosus and rheumatoid arthritis. However, the link is unclear between SSc and macrovascular disease, particularly atherosclerotic cardiovascular disease (CVD). This meta-analysis aimed to investigate the association between SSc and CVD.

METHODS

A thorough literature search was conducted in the Cochrane, Embase, Medline, and PubMed to identify all cohort studies comparing the risk of CVD with and without SSc. The pooled hazard ratios (HRs) with 95% confidence intervals (CIs) of cardiovascular end points were calculated. The risk of bias of included studies was assessed by the Newcastle-Ottawa scale.

RESULTS

Seven cohort studies with a total of 14,813 study participants were included. In a comparison of SSc patients versus non-SSc controls, the pooled HR for cardiovascular disease was 2.36 (95% CI 1.97-2.81); for peripheral vascular disease was 5.27 (95%CI 4.27-6.51); for myocardial infarction was 2.36 (95% CI 1.71-3.25); and for stroke was 1.52 (95% CI 1.18-1.96).

CONCLUSION

This meta-analysis revealed that SSc was associated with an increased risk of CVD. Clinicians who manage patients with SSc should be aware of the increased cardiovascular burden and undertake preventive measures.

Systemic Sclerosis Is Not Associated With Worse Outcomes of Patients Admitted for Ischemic Stroke: Analysis of the National Inpatient Sample

Introduction

Systemic sclerosis (SSc) is known to increase the risk of ischemic stroke and other cerebrovascular events. It is, however, unclear if SSc negatively impacts the outcomes of ischemic stroke hospitalizations. This study aims to compare the outcomes of patients primarily admitted for ischemic stroke with and without a secondary diagnosis of SSc.

Methods

Data were extracted from the National Inpatient Sample (NIS) 2016 and 2017 database. NIS is the largest hospitalization database in the United States. We searched the database for hospitalizations of adult patients admitted with a principal diagnosis of ischemic stroke, with and without SSc as the secondary diagnosis using International Classification of Diseases, Tenth Revision (ICD-10) codes. The primary outcome was inpatient mortality, and secondary outcomes were hospital length of stay (LOS), total hospital charge, odds of undergoing mechanical thrombectomy, and receiving tissue plasminogen activator (TPA). Multivariate logistic and linear regression analysis was used to adjust for confounders.

Results

Over 71 million discharges were included in the NIS database for the years 2016 and 2017. Out of 525,570 hospitalizations for ischemic stroke, 410 (0.08%) had SSc. Hospitalizations for ischemic stroke with SSc had similar inpatient mortality (6.10% vs 5.53%, adjusted OR 0.66, 95% CI (0.20-2.17); p=0.492), length of stay (LOS) (5.9 vs 5.7 days; p=0.583), and total hospital charge ($74,958 vs $70,197; p=0.700) compared to those without SSc. Odds of receiving TPA (9.76% vs 9.29%, AOR 1.08, 95% CI (0.51-2.27), P=0.848) and undergoing mechanical thrombectomy (7.32% vs 5.06%, AOR 0.75, 95% CI (0.28-1.98), P=0.556) was similar between both groups.

Conclusions

Hospitalizations for ischemic stroke with SSc had similar inpatient mortality, LOS, total hospital charge, odds of receiving TPA, and mechanical thrombectomy compared to those without SSc.