Journal of atherosclerosis and thrombosis最新文献

Aim: The triglyceride-glucose (TyG) index, a biomarker commonly used to evaluate metabolic health status, can predict unfavorable outcomes. Thus, we aimed to explore evidence regarding the prognostic value of the TyG index in patients with ischemic cardiomyopathy and heart failure with preserved ejection fraction (HFpEF).

Methods: We enrolled 277 consecutive participants with new-onset ischemic cardiomyopathy and HFpEF who underwent coronary artery bypass grafting (CABG). The primary study endpoint was major adverse cardiovascular events (MACEs), defined as cardiac death, acute myocardial infarction, graft failure, and stroke.

Results: During a median follow-up of 43.34 months, 70 patients (25.1%) experienced MACEs. A multivariable Cox regression analysis identified the TyG index as an independent risk factor for MACEs, with a higher baseline TyG index associated with greater risk after adjusting for confounding factors. A restricted cubic spline showed that the TyG index had a linear relationship across the range. The optimal cut-off value of 9.167 for the TyG index demonstrated a sensitivity of 70% and specificity of 84.1%, with an AUC of 0.820 (p＜0.001, 95% CI: 0.762-0.878), thus effectively stratifying participants into lower TyG index (TyG ＜9.167, n = 182) and higher TyG index groups (TyG ≥ 9.167, n = 95), while subgroup analyses confirmed a robust association with MACEs across various populations. Furthermore, the time-dependent area under the curve, calibration curve, and decision curve analyses demonstrated that incorporating the TyG index into the traditional cardiovascular risk factor model significantly enhanced the prediction of MACE risk. Additionally, significant net reclassification improvement (0.335, 95% confidence interval [CI]: 0.136-0.518, p＜0.05) and integrated discrimination improvement (0.178, 95%CI: 0.089-0.270, p＜0.001) were also observed.

Conclusion: The TyG index is a reliable prognostic indicator for MACEs after CABG in patients with ischemic cardiomyopathy and HFpEF and it serves as a valuable complement to traditional cardiovascular risk factors by providing metabolic-related insights.

Pediatric lifestyle disease screening in Japan plays a crucial role in the early detection of obesity, dyslipidemia, hypertension, and type 2 diabetes. However, it is not mandated by national law, instead being conducted independently by local governments, which results in significant regional disparities. While many programs focus only on obese children, this approach risks missing high-risk individuals with normal weight, such as those with familial hypercholesterolemia (FH) or non-obese type 2 diabetes. Regional initiatives in cities such as Fukuoka, Niigata, Kumamoto, and Kitakyushu have demonstrated various effective models, including the use of growth and obesity curves, expanded screening parameters, and school-healthcare collaborations. National surveys show that fewer than 30% of municipalities conduct such screenings, often with limited standardization. Kagawa Prefecture presents a notable example of integrating FH screening with lifestyle checkups to achieve high participation and follow-up rates. To expand and improve its effectiveness, universal screening based on standardized criteria is essential. Efforts should also focus on public education, early intervention, and coordinated systems involving school nurses and teachers, pediatricians and family doctors, local medical associations, educational boards, and municipal health authorities. Universal screening, combined with individualized follow-up and strong community collaboration, can help healthcare providers, educators, and local governments in Japan respond more effectively to the growing prevalence of pediatric obesity and metabolic disorders. This approach also promotes equitable access to preventive care for children.

Aim: Frailty, particularly chronic limb-threatening ischemia (CLTI), is a major health concern in patients with peripheral artery disease. CLTI onset can lead to increased frailty and impaired ability to perform daily activities. However, its in-hospital frailty progression in these patients remain poorly defined. This study aims to address this knowledge gap.

Methods: We analyzed 841 CLTI patients (mean age, 75.8 years; 60.2% male) who underwent endovascular therapy (EVT) and were discharged alive from a multicenter registry. Frailty was assessed at admission and discharge using the Clinical Frailty Scale (CFS), categorized as non-frail (1-3), mildly frail (4-5), or advanced frail (6-9). Frailty progression was defined as a transition to a higher frailty category during hospitalization. The predictors of frailty progression during hospitalization were assessed using logistic regression analyses.

Results: Overall, 103 patients (12.2%) experienced frailty progression. Compared to those without progression, these patients had lower left ventricular ejection fraction (LVEF), lower hemoglobin and albumin levels, and more severe wounds. Independent predictors of frailty progression included LVEF ＜40% (odds ratio [OR], 2.02), hemoglobin ＜11 g/dL (OR 1.67), and Wound Grade 3 (OR 2.04). Within 2 years after discharge, the amputation-free survival rate was significantly lower in the progression group than in the non-progression group (42.6% vs. 56.0%; log-rank p = 0.008). The wound healing rate within 2 years after EVT was also significantly lower in the progression group than in the non-progression group (78.2% vs. 88.8%; log-rank p = 0.001).

Conclusions: In-hospital frailty progression was observed in one of the eight patients with CLTI undergoing EVT. Frailty progression was linked to more severe clinical status and worse life and limb outcomes than cases without progression.

Polygenic risk scores (PRSs), constructed from numerous common single nucleotide polymorphisms (SNPs), have emerged as useful tools for predicting future atherosclerotic cardiovascular disease (ASCVD). PRSs have shown independent associations with ASCVD outcomes and are increasingly being considered to enhance risk stratification and guide primary prevention strategies. However, most evidence to date has been derived from populations of European ancestry, and their generalizability to other populations, including East Asians, remains uncertain. This review summarizes the current epidemiological evidence on the association between PRS and ASCVD outcomes, focusing on findings in Japanese cohorts. We discuss the potential of PRS as a clinical decision support tool, its incremental value over traditional risk factors, and its role in the early identification of high-risk individuals. We also highlight the limited number of prospective studies in the Japanese population, where validation and implementation studies are ongoing. Given the growing accessibility of genetic testing and the potential of PRS to complement conventional risk assessments, further large-scale studies are warranted to evaluate its clinical utility across diverse populations. Expanding ancestry-specific biobanks and improving PRS transferability are essential steps toward the equitable implementation of genomic risk prediction in ASCVD prevention.

Aim: To evaluate the risk factors, location, treatment, and outcomes of stroke due to arterial dissection, we examined these characteristics in a substantial, long-standing, nationwide stroke cohort.

Methods: The study participants were patients with acute stroke who were registered in the Japan Stroke Data Bank between January 1999 and December 2020. We focused on patients with stroke caused by extracranial or intracranial artery dissection and examined their clinical characteristics, treatments, and outcomes. In addition, we compared the results between clinical subtypes with and without dissection.

Results: Among the 218,799 registered patients with acute stroke, 1,353 (0.62%) were attributed to artery dissection. Of these, 880 patients had ischemic stroke, 16 had intracerebral hemorrhage, and 457 had subarachnoid hemorrhage (SAH). Dissection cases were most prevalent among individuals in their 40s and 50s, with intracranial vertebral artery dissection being the primary cause of ischemic stroke and SAH. Male sex, dyslipidemia, diabetes mellitus, and a history of smoking were associated with a higher likelihood of ischemic stroke than SAH. Unfavorable outcomes, defined as a modified Rankin score ≥ 4 at discharge, were observed in 18.9% of ischemic stroke cases and 42.6% of SAH cases with dissection. Neurological severity and older age at admission are associated with unfavorable outcomes in patients with ischemic stroke and SAH.

Conclusions: Ischemic stroke was the most frequent subtype of stroke in patients with arterial dissection, followed by SAH. Patients with stroke due to dissection were younger than those without. Neurological severity and older age at admission are substantial risk factors for unfavorable stroke outcomes due to artery dissection.

Aim: The American Heart Association (AHA) proposed Life's Essential 8 score (LE8) in 2022 as a new metric for cardiovascular health (CVH). This study investigated the association between the LE8 score and the development of carotid artery plaque.

Methods: Data were drawn from the Asymptomatic Polyvascular Abnormalities Community (APAC) cohort study. In 2010, 1,938 participants without carotid plaques were recruited and followed-up until 2012. LE8 scores ranging from 0 to 100 were categorized as low (0-49), moderate (50-79), and high (80-100), whereas carotid plaques were measured using color Doppler ultrasound. A logistic analysis was used to analyze the association between the LE8 score and carotid plaque.

Results: During the 2-year follow up period, 350 (18.1%) patients developed new carotid plaques. The incidence of newly developed carotid plaques decreased from 27.0% in the low-LE8 group to 13.7% in the high-LE8 group (p＜0.001). Adjusted odds ratios (ORs) for plaque development were 0.65 (95% confidence interval [CI], 0.45-0.93) in the moderate-LE8 group and 0.55 (95% CI, 0.34-0.90) in the high-LE8 group compared to the low-LE8 group. Higher LE8 scores were associated with a lower risk of stable and multiple carotid plaques.

Conclusions: An elevated LE8 score was associated with a lower risk of carotid plaque formation as well as plaque stability and quantity. Promoting adherence to optimal CVH levels may be beneficial in reducing the burden of carotid plaques and the risk of cardiovascular disease.

Aim: Cholesterol uptake capacity (CUC) is a functional assessment of high-density lipoprotein (HDL) and has drawn attention for the risk stratification of atherosclerotic cardiovascular disease (ASCVD). This study evaluated the usefulness of HDL-CUC as a predictive marker for long-term ASCVD events in patients with coronary artery disease (CAD).

Methods: This retrospective observational study included 503 patients with CAD who underwent coronary revascularization. Blood was sampled from the participants within three months before or after index revascularization. The CUC was assayed using a previously reported automated system. The study population was divided into three groups according to the tertiles of CUC levels. The primary outcome was ASCVD events, which were defined as a composite of all-cause death, acute myocardial infarction, stroke, and peripheral artery disease.

Results: A total of 29 events were observed during the follow-up (median 2.8 years). The risk of the primary outcome in the low-CUC group was significantly higher than that in the high-CUC group (3-year incidence: low CUC 8.8% vs. high CUC 4.0%; log-rank p = 0.046). After adjusting for age and sex, the risk in the low-CUC group relative to that in the high-CUC group remained significantly high (hazard ratio 3.17, 95% confidence interval 1.05-9.54, p = 0.040).

Conclusion: Low CUC in patients with CAD were associated with a higher risk of ASCVD events after coronary revascularization than high CUC levels. The assessment of HDL functionality measured by CUC would be useful for the risk prediction of ASCVD after coronary revascularization.

Aim: Adiponectin is an anti-diabetic and anti-atherogenic protein secreted primarily from adipose tissue. Adiponectin and modified LDL (mLDL) form a complex to modulate their biological activity. To elucidate the significance of the complex formation, we analyzed its effects on vascular tissue and developed and verified novel quantifying methods for adiponectin.

Methods: To study the significance of the mLDL-adiponectin complex (MAC) formation, we used the wire-myography method on rat mesenteric artery. We developed a method to measure MAC by using LOX-1 as the capture protein and anti-adiponectin antibody for detection. We compared serum MAC levels between hemodialysis patients and control subjects.

Results: Administering mLDL alone to rat mesenteric artery impaired endothelium-dependent vasorelaxation, whereas simultaneously administering adiponectin with mLDL protected rat mesenteric artery from the mLDL-induced impairment of vasorelaxation. This finding indicates MAC formation prevents endothelium from mLDL-induced dysfunction in tissue. Using our novel ELISA for MAC, we found that MAC was increasingly detectable depending on the doses of mLDL and adiponectin in vitro. In serum, hemodialysis patients showed a significantly higher ratio of MAC-high patients (higher than the median level of MAC) than did healthy controls. Furthermore, the MAC-high hemodialysis group had lower mLDL activity measured as LOX-1 ligand containing apoB.

Conclusion: Using our ELISA, we detected MAC in human serum that protected blood vessels from the deleterious effects of oxidized LDL.

Aim: The accumulation of metabolic risk factors, namely high blood pressure, hyperlipidemia, and hyperglycemia, has been associated with cardiovascular diseases. However, little evidence is available on the prognostic significance of metabolic risk factor accumulation in nonobese individuals. This study investigated this issue by analyzing prefecture-wide health checkup and health insurance data in Japan.

Methods: We analyzed data from 366,881 adults aged 40-74 years who were enrolled in the National Health Insurance, excluding those who experienced a stroke or coronary artery diseases or required long-term care. Baseline clinical information was obtained from annual health checkup data. Incidences of stroke and coronary artery diseases were obtained from insurance data.

Results: In the nonobese population, the hazard ratio for stroke increased linearly with the number of accumulated metabolic risk factors, particularly among those aged ＜65 years men (one factor: 2.21, two factors: 2.60; three factors: 3.93) and women (one factor: 1.49, two factors: 1.57; three factors: 2.27). Similar results were observed in the analysis for coronary artery diseases. After excluding participants receiving medications, the association of metabolic risk factor with stroke remained significant, although its association with coronary artery disease became less significant. In the analysis for each metabolic risk factors, high blood pressure (men: hazard ratio = 2.85; women: hazard ratio = 2.17; P＜0.001), but not hyperlipidemia and hyperglycemia, was associated with stroke in the nonobese population.

Conclusion: The accumulation of metabolic risk factors needs to be considered a risk factor for cardiovascular diseases even in individuals without obesity.