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Background@#This study aimed to retrospectively assess results of intracranial meningioma surgerywith or without intraoperative neuromonitoring (IONM) in a single institution. @*Methods@#Two cohorts (a historical cohort and a monitoring cohort) were collected for the analy-sis. Before IONM was introduced, a total of 107 patients underwent intracranial meningioma operation without IONM from January 2000 to December 2008 by one neurosurgeon (historical cohort). After IONM was introduced, a total of 99 patients with intracranial meningioma were operated under IONM between November 2018 and February 2023 by two neurosurgeons (monitoring cohort). A retrospective comparison was made on the complications from meningioma surgery between the two groups. @*Results@#In the monitoring cohort, warning signals of motor evoked potential (MEPs) or so-matosensory evoked potential (SSEPs) were alarmed in 10 patients. Two of these 10 patients aborted the operation and eight of these 10 patients with warning signals underwent tumor resection. Of these eight patients, five showed postoperative morbidity. Five of 89 patients without warning signals developed neurological deficits. In the historical cohort, 14 of 107 patients showed postoperative morbidity or mortality. @*Conclusion@#Even after successful resection of intracranial meningiomas prior to the advent ofIONM, integration of MEPs and SSEPs monitoring yielded valuable insights for surgical teams during operative procedures.
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Background@#The coronavirus disease 2019 (COVID-19) pandemic led to a decrease in the seasonal incidence of many respiratory viruses worldwide due to the impact of nonpharmaceutical interventions (NPIs). However, as NPI measures were relaxed, respiratory viral infections re-emerged. We aimed to characterize the epidemiology of respiratory viruses in Korean children during post-COVID-19 pandemic years compared to that before the pandemic. @*Methods@#A nationwide prospective ongoing surveillance study has been conducted for detection of respiratory viruses between January 2017 and June 2023. We included data on adenovirus (AdV), human bocavirus (HBoV), human coronavirus (HCoV), human metapneumovirus (HMPV), human rhinovirus (HRV), influenza virus (IFV), parainfluenza virus (PIV), and respiratory syncytial virus (RSV), which were detected in children and adolescents younger than 20 years. We analyzed the weekly detection frequency of individual viruses and the age distribution of the affected children. The study period was divided into prepandemic (2017–2019) and postpandemic (2021–2023) periods. @*Results@#A total of 19,589 and 14,068 samples were collected in the pre- and postpandemic periods, respectively. The overall detection rate of any virus throughout the study period was 63.1%, with the lowest occurring in the 2nd half of 2020 (50.6%) and the highest occurring in the 2nd half of 2021 (72.3%). Enveloped viruses (HCoV, HMPV, IFV, PIV, and RSV) almost disappeared, but nonenveloped viruses (AdV, HBoV, and HRV) were detected even during the peak of the COVID-19 pandemic. The codetection rate increased from 15.0% prepandemic to 19.1% postpandemic (P < 0.001). During the postpandemic period, a large out-of-season PIV and HMPV epidemic occurred, but the usual seasonality began to be restored in 2023.The mean age of children with each virus detected in 2023 was significantly greater than that in prepandemic years (P = 0.003 and 0.007 for AdV and HCoV, respectively; P < 0.001 for others). The mean age of children with IFV increased in 2022 (11.1 ± 5.2 years) from prepandemic years (7.9 ± 4.6 years) but decreased to 8.7 ± 4.1 years in 2023. @*Conclusion@#With the relaxation of NPI measures, several seasonal respiratory viruses cocirculated with unusual seasonal epidemic patterns and were associated with increasing age of infected children.
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Objective@#In this study, the association between the monocyte-to-high-density lipoprotein cholesterol ratio (MHR) at diagnosis and poor outcomes of atherosclerosis-related antineutrophil cytoplasmic antibody-associated vasculitis (AAV) during follow-up in patients with AAV was investigated. @*Methods@#This retrospective study included 138 patients diagnosed with AAV. Their comprehensive medical records were meticulously reviewed. All-cause mortality, cerebrovascular accident (CVA), and acute coronary syndrome (ACS) were evaluated as atherosclerosis-related poor outcomes of AAV. MHR was obtained by dividing monocyte counts (/mm3 ) by high-density lipoprotein cholesterol (mg/dL) levels. @*Results@#The median age of the 138 patients was 58.3 years with 44 being male (31.9%). Among the 138 patients, 11 (8.0%) died, and 11 (8.0%) and 9 (6.5%) had CVA, and ACS, respectively. MHR at diagnosis was significantly correlated with the Birmingham vasculitis activity score, erythrocyte sedimentation rate, and C-reactive protein at diagnosis. Among the three poor outcomes of AAV, only CVA during follow-up was significantly associated with MHR at diagnosis, and thus, only CVA was considered an atherosclerosis-related poor outcome of AAV. In the multivariable Cox hazards model analysis, MHR (hazard ratio [HR]: 1.195) and serum albumin (HR: 0.203) at diagnosis were independently associated with CVA during follow-up. Additionally, patients with MHR at diagnosis ≥3.0 exhibited a significantly higher risk for CVA and lower cumulative CVA-free survival rate than those with MHR at diagnosis <3.0. @*Conclusion@#This study is the first to demonstrate clinical implications of MHR suggesting that MHR at diagnosis is significantly and independently associated with CVA during follow-up in patients with AAV.
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Objectives@#Childhood maltreatment can negatively impact cognitive development, including executive function, working memory, and processing speed. This study investigated the impact of childhood maltreatment on cognitive function in young adults using various measurements, including computerized tests, and their relationship with emotional dysregulation. @*Methods@#We recruited 149 healthy individuals with and without maltreatment experiences and used the Wechsler Adult Intelligence Scale IV (WAIS-IV) and a computerized battery to analyze cognitive function. @*Results@#Both the WAIS-IV and computerized tests revealed that individuals with a history of childhood maltreatment had decreased cognitive function, especially in terms of working memory and processing speed. These individuals tended to employ maladaptive emotion regulation strategies. Among cognitive functions, working memory is negatively related to maladaptive emotion regulation strategies such as catastrophizing. @*Conclusion@#This study highlights the effects of childhood maltreatment on cognitive function in young adulthood. Moreover, the study suggests clinical implications of cognitive interventions for improving emotion regulation and cognitive function in individuals with a history of childhood maltreatment.
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Calcific aortic valve disease (CAVD) is an uncommon disease in young adults, unless there is a congenital anomaly in the aortic valve. We report a case of CAVD identified during the autopsy of a 26-year-old male soldier who died in his room while sitting on a chair. Macroscopic examination revealed multiple nodules in the semilunar cusps of the aortic valve, and that the commissure of semilunar valve cusps was slightly fused. Under microscopic examination, fibrotic nodules with neovascularization were identified in the fibrosa layer of the aortic valve, although neither calcification nor chronic inflammation were identified in the fibrotic nodule. Mitral valve prolapse and left ventricular hypertrophy with interstitial fibrosis were also identified. Microscopic examination of CAVD typically shows calcified nodules in the fibrosa layer of the valve, but fibrosis alone, without calcification, can be observed in the early stage of the disease. Death from CAVD is rare in young adults, so careful examination must be taken not to misdiagnose this condition with rheumatic valvular disease, which is relatively common in this population.
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Objective@#The Acceptance and Action Questionnaire for Obsessions and Compulsions (AAQ-OC) is a version of the Acceptance and Action Questionnaire (AAQ) that specifically measures unwanted intrusive thoughts and responses (e.g., experiential avoidance) to them. This study aimed to investigate the reliability and validity of the Korean version of the AAQ-OC in clinical and nonclinical Korean samples. @*Methods@#In this study, 561 university students and 121 patients with obsessive–compulsive disorder (OCD) completed the AAQ-OC and several other psychological scales. Descriptive, correlation, and exploratory and confirmatory factor analyses as well as group comparisons were conducted. @*Results@#The results of the exploratory and confirmatory factor analyses indicated a two-factor structure that best fits the data in the university sample: Factors 1 and 2 matched the original Valued Action and Willingness subscales, respectively. The reliability analyses revealed that the AAQ-OC and its factors had excellent internal consistencies. As regards the concurrent validity, the AAQ-OC and its factors had a positive correlation with the AAQ-II and Cognitive Fusion Questionnaire. Compared with the university students, the OCD patients had higher AAQ-OC scores, and their obsessive–compulsive symptoms, particularly the two symptom dimensions of responsibility for harm and mistakes and unacceptable thoughts, were significantly associated with the AAQ-OC and two subscales. @*Conclusion@#The findings of this study confirm the reliability and validity of the Korean version of the AAQ-OC.
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Background/Aims@#This study applied the 2022 American College of Rheumatology (ACR)/European Alliance of Associations for Rheumatology (EULAR) criteria for antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) to patients with systemic sclerosis (SSc) and investigated the frequency of overlap syndrome of SSc and AAV (SSc-AAV-OS). @*Methods@#Among the 232 patients diagnosed with SSc, 105 with signs suggestive of small- or medium-vessel vasculitis, which were defined as the present of interstitial lung disease (ILD), peripheral neuropathy, or suspected renal vasculitis, were included in this study and analyzed. @*Results@#Among the 105 SSc patients, the detection rate of ANCA was 19.0%. When the 2022 ACR/EULAR criteria were applied, the frequency of SSc-AAV-OS was 20.0%, which was much higher than 1.7% reported with previous criteria for AAV. ANCA positivity contributed to the reclassification of SSc-AAV-OS more than ANCA negativity in SSc patients with signs suggestive of small- or medium-vessel vasculitis. @*Conclusions@#The frequency of SSc-AAV-OS in SSc patients with signs suggestive of small- or medium-vessel vasculitis at diagnosis was 20.0%. Therefore, we suggest that physicians should perform ANCA tests in SSc patients exhibiting signs suggestive of small- or medium-vessel vasculitis and apply the new criteria for AAV.
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We conducted a cohort study to assess vaccine effectiveness (VE) of coronavirus disease 2019 vaccine combinations on severe acute respirator y syndrome coronavirus 2 critical infection and death among elderly population in Korea. From Januar y to August 2022, VE against death for 4 doses mRNA recipients was 96.1%, whereas 1-dose viral vector + 3-dose mRNA recipients had VE of 90.8%.
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Antimicrobial (AM) resistance is a growing threat in human and veterinary medicine, spreading across species and perceived as One-Health issue. Prudent use of AM products is essential in mitigating this risk in both human and veterinary medicine. Farm veterinarians, responsible for prescribing appropriate AM and offering advice to farmers on their proper usage, are regarded as key players in the livestock industry. An online survey of farm veterinarians (n = 1,531) was conducted to assess their educational experience, beliefs, current status of prescription, practical behavior, and self-efficacy regarding the prudent use of antimicrobials (PUA). The data from 170 respondents were analyzed using descriptive statistics, regression and mediation analysis. Participants chose AM based on their experiences, academic resources, and peer veterinarians. Approximately 77% did not routinely conduct antibiotic-susceptibility-test. Most participants believed in the importance of PUA and the role of veterinarians to reduce AM resistance, but they reported a lack of awareness among farmers and insufficient national support interfere with their practical behavior with regard to PUA. Half of the participants had PUA-education, and 78.6% reported that education had a positive impact on their behavior with PUA. Self-efficacy partly mediates the relationship between belief and behavior for PUA, which accounted for 23.77% of the total effect that beliefs have on behavior for PUA. The findings of the study show that enhancing veterinarians' abilities to practice and their self-efficacy through education tailored to the current status of farms can contribute to the reduction of AMs in the livestock sector.
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The hepatitis A virus (HAV) induces severe acute liver injury and is adapted to human and monkey cell lines but not other cells. In this study, the HAV was inoculated into porcine kidney (PK-15) cells to determine its infectivity in porcine cells. The growth pattern of the HAV in PK-15 cells was compared with its growth pattern in fetal rhesus kidney (FRhK-4) cells. The growth of HAV was less efficient in PK-15 cells. In conclusion, HAV replication was verified in PK-15 cells for the first time. Further investigations will be needed to identify the HAV-restrictive mechanisms in PK-15 cells.
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A ruptured brain arteriovenous malformation (bAVM) presenting with a hematoma may have unseen parts of the shunts in diagnostic angiography in the acute phase, which may lead to innate incomplete evaluation for the whole angioarchitecture of the bAVM. Even though it is generally accepted that the nidus of a ruptured bAVM may be underestimated in angiography during the acute phase due to hematoma compression, documentation of the underestimated parts has not been described in the literature. The authors report 2 cases of ruptured bAVMs in which the obscured segments were cast with liquid embolic material, which suggests a potential presence of obscured segments in bAVMs.
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Objective@#Acceptance and commitment therapy (ACT) has been recently introduced for treating obsessive-compulsive disorder (OCD). Although there are data supporting the efficacy of ACT, only few studies have investigated the effectiveness of ACT against any obsessivecompulsive (OC) symptom dimension or a specific dimension alone. @*Methods@#In total, 64 patients with OCD received an 8-session ACT group program. All measures were evaluated before and after treatment. The Dimensional Obsessive-Compulsive Scale was used to assess OCD severity across the four empirically supported symptom dimensions (i.e., contamination, responsibility for harm, unacceptable thoughts, and symmetry). ACT processes were evaluated using the Acceptance and Action Questionnaire-II (AAQ-II), Acceptance and Action Questionnaire for Obsessions and Compulsions (AAQOC), and Cognitive Fusion Questionnaire. @*Results@#After an 8-week program, there were significant reductions in all four OC symptom dimensions after ACT. The unacceptable thoughts and contamination domains had medium effect size. The responsibility for harm and symmetry dimensions had small effect size. The unacceptable thoughts dimension was significantly correlated with all ACT process measures. The symmetry dimension was significantly correlated with AAQ-OC and AAQ-II scores while the responsibility for harm dimension was correlated with AAQ-II alone. However, the contamination dimension was not associated with any process measures. @*Conclusion@#ACT may be effective for managing all four symptom dimensions with small to moderate effect size. Moreover, depending on the symptom dimension, there may be different relationship patterns between symptom reduction and changes in ACT processes.
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Purpose@#The present study investigated and compared the antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) activity-predicting ability of the serum concentrations of the four interleukin (IL)-12 family cytokines including IL-23, IL-27, IL-35, and IL-39 in patients with microscopic polyangiitis (MPA) and granulomatosis with polyangiitis (GPA). @*Materials and Methods@#The present study included 70 patients with MPA and GPA. Clinical and laboratory data, particularly Birmingham Vasculitis Activity Score (BVAS), at the time of blood collection were obtained. The serum concentrations of IL-23, IL-27, IL-35, and IL-37 were measured using sera stored at -80°C. Patients were divided into two groups: the upper half of BVAS (BVAS ≥12) and the lower half of BVAS (BVAS <12). @*Results@#The serum concentrations of IL-23 and IL-27 reflected AAV activity. Patients with the upper half of BVAS exhibited significantly higher serum concentrations of IL-23 and IL-27 than those without. Patients with the serum concentrations of IL-23 ≥132.1 pg/mL or IL-27 ≥684.7 pg/mL exhibited higher frequency and risk for the upper half of BVAS than those without [relative risks (RR) 5.143 and RR 4.091, respectively]. The serum concentrations of IL-27 were associated with age ≥65 years and proteinase 3-ANCA (or C-ANCA) negativity, whereas, those of IL-23 were associated with MPA. However, the serum concentrations of IL-35 and IL-39 were not useful in predicting AAV activity in this study. @*Conclusion@#The present study is the first to demonstrate that among the various members of IL-12 family cytokines, the serum concentrations of IL-23 and IL-27 possess AAV activity-predicting ability.
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Background@#This retrospective observational matched-cohort study of 2,151,216 individuals from the Korean coronavirus disease 2019 (COVID-19) vaccine effectiveness cohort aimed to evaluate the comparative effectiveness of the COVID-19 bivalent versus monovalent vaccines in providing additional protection against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, critical infection, and death in Korea. @*Methods@#Among individuals, those vaccinated with COVID-19 bivalent vaccines were matched in a 1:1 ratio with those who were vaccinated with monovalent vaccines (bivalent vaccines non-recipients) during the observation period. We fitted a time-dependent Cox proportional-hazards model to estimate hazard ratios (HRs) of COVID-19 outcomes for infection, critical infection, and death, and we defined vaccine effectiveness (VE) as 1–HR. @*Results@#Compared with the bivalent vaccination group, the incidence proportions in the monovalent vaccination group were approximately three times higher for infection, nine times higher for critical infection, and 11 times higher for death. In the early stage of bivalent vaccination, relative VE of bivalent vaccine against monovalent vaccine was 42.4% against SARS-CoV-2 infection, 81.3% against critical infection, and 85.3% against death. In addition, VE against critical infection and death according to the elapsed period after bivalent vaccination was maintained at > 70%. @*Conclusion@#The bivalent booster dose provided additional protection against SARS-CoV-2 infections, critical infections, and deaths during the omicron variant phase of the COVID-19 pandemic.
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Background@#Loss of companion animals can result in various psychological reactions, including complicated grief, depression, anxiety, and insomnia. However, research on the prevalence of patients requiring clinical intervention is limited. Moreover, research examining the relationship between childhood trauma and psychological symptoms after pet loss is lacking. Therefore, this study aimed to investigate the rates of clinically significant psychological distress after pet loss and the impact of childhood trauma on adults who have experienced pet loss. @*Methods@#An online survey was conducted with non-clinical adult participants who had experienced the loss of a companion animal. Psychiatric characteristics were evaluated using standardized assessments, including the Inventory of Complicated Grief (ICG), the Patient Health Questionnaire-9 (PHQ-9), the Generalized Anxiety Disorder-7 (GAD-7), and the Insomnia Severity Index (ISI). Childhood trauma was evaluated using the Childhood Trauma Questionnaire (CTQ). @*Results@#In a sample of 137 individuals who had experienced pet loss, the percentages of those who exceeded the cutoff points were 55% for the ICG, 52% for the PHQ-9, 40% for the GAD-7, and 32% for the ISI. The group that reported childhood trauma exhibited significantly higher scores on the ICG (t = 2.16, P = 0.032), PHQ-9 (t = 3.05, P = 0.003), GAD-7 (t = 2.61, P = 0.010), and ISI (t = 2.11, P = 0.037) than in the group without childhood trauma.For participants who experienced pet loss for less than one year, there was no significant difference in the ICG between the trauma and non-trauma groups, as both had extremely high scores. However, the trauma group had a significantly higher PHQ-9 (t = 2.58,P = 0.012) than the non-trauma group. In contrast, for participants who experienced pet loss for more than one year, the trauma group had a significantly higher ICG (t = 2.22, P = 0.03) than the non-trauma group, while there was no significant difference in the PHQ-9. Additionally, the emotional abuse scores on the CTQ were most significantly correlated with the ICG scores even after controlling for depressive symptoms. @*Conclusion@#People who experienced pet loss had significant psychological symptoms, ranging from 32% to 55%. Childhood trauma experiences affect complicated grief, depressive symptoms, anxiety symptoms, insomnia and prolonged grief disorder after pet loss. After pet loss, people with childhood trauma may require more psychological help than those without trauma.
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Objective@#Systemic lupus erythematosus (SLE) is an autoimmune disease, characterized by the production of autoantibodies and high cholesterol levels. HMG-CoA (3-hydroxy-3-methylglutaryl-coenzyme A) reductase inhibitors have exhibited anti-inflammatory effects in several clinical trials. We conducted this study to evaluate the effect of rosuvastatin on inflammatory responses in lupus-prone mice. @*Methods@#MRL/lpr mice were intraperitoneally injected with rosuvastatin (10 mg/kg, n=4) or vehicle (2% dimethyl sulfoxide, n=4) five times a week from 13 to 17 weeks of age. The serum levels of low-density lipoprotein (LDL) cholesterol and autoantibodies were measured, as well as the urine levels of albumin. Renal tissues were stained for histopathological analysis. Concentrations of key inflammatory cytokines were measured in the serum, and messenger RNA (mRNA) levels in target organs (kidney, spleen, and lymph nodes) were evaluated. @*Results@#Rosuvastatin treatment significantly decreased serum LDL cholesterol concentration in MRL/lpr mice. However, the clinical manifestations and autoantibody titres did not improve with rosuvastatin treatment. In addition, serum inflammatory cytokines and proteinuria did not change. Histopathological analysis of the kidneys revealed no improvement. When assessing the expression of mRNA, treatment with rosuvastatin decreased tumor necrosis alpha and interleukin-17 concentration in spleen and kidney tissue and in the kidneys and lymph nodes of MRL/lpr mice, respectively. @*Conclusion@#Although it can decrease inflammatory cytokines in the lymphoid organs and kidneys of MRL/lpr mice, treatment with rosuvastatin is insufficient to alleviate SLE.
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Objective@#This study evaluated whether the hepatic steatosis index (HSI) at antineutrophil cytoplasmic antibody-associated vasculitis (AAV) diagnosis could forecast poor outcomes during the disease course in AAV patients. @*Methods@#This study included 260 AAV patients. The equation for HSI is as follows: HSI=8×(alanine aminotransferase/aspartate aminotransferase)+body mass index+(2, diabetes mellitus)+(2, female). The cut-off of HSI was obtained using the receiver operating characteristic curve. @*Results@#The median age of the 260 patients was 59.5 years, and 65.0% were female. Among the continuous variables excluding the parameters composing the equation for HSI, HSI was significantly correlated with Birmingham vasculitis activity score, fivefactor score, haemoglobin, blood urea nitrogen, serum creatinine, and total cholesterol. Among poor outcomes, the area under the curve of HSI for end-stage renal disease (ESRD) was significant, and the cut-off of HSI for ESRD was set at ≤30.82. AAV patients with HSI ≤30.82 exhibited a significantly higher risk of ESRD (relative risk 3.489) and a significantly lower cumulative ESRD-free survival rate than those with HSI >30.82. @*Conclusion@#This study is the first to demonstrate that HSI at AAV diagnosis could forecast ESRD during the disease course in AAV patients.
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Although patellofemoral arthritis is a common and debilitating orthopedic disorder, its treatment varies and remains controversial. This review aims to provide an overview of the current understanding of the pathophysiology of patellofemoral arthritis, as well as its various diagnostic and treatment options.Current Concepts: The pathophysiology of patellofemoral arthritis includes lower limb malalignment, trochlear and/or patellar dysplasia, patellar instability, trauma, and obesity. The disorder is characterized by chronic anterior knee pain aggravated by flexion of the knee joint. A critical imaging study of the Merchant and lateral knee radiographs may show the progression of patellofemoral arthritis and dysplasia of the patellofemoral joints. Non-pharmacologic treatment options for patellofemoral arthritis include patient education, self-management, exercise, weight loss, taping, bracing, and orthotics. Pharmacologic agents (non-steroidal anti-inflammatory drugs, acetaminophen, oral narcotics, and duloxetine) and intra-articular injection therapies (glucocorticoids, hyaluronic acid, platelet-rich plasma, and other regenerative therapies) can be helpful for symptom relief in patients with patellofemoral arthritis. The surgical treatment can begin with lateral retinacular release to realign and decompress the patellofemoral joint. If failure in the improvement of symptoms is noted, a tibial tubercle osteotomy can be considered in young and active patients. While the early design and technique of patellofemoral arthroplasty were less than encouraging, more recent implant design and surgical techniques have demonstrated robust results.Discussion and Conclusion: Patellofemoral arthritis is a unique entity compared with tibiofemoral arthritis marked by distinct epidemiology, biomechanics, and risk factors and treatment options. It is essential to understand its pathophysiology and ensure proper treatment options.
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Objectives@#This study was conducted to evaluate the relationship among childhood maltreatment, cognitive function and emotion dysregulation in healthy adults who have not been diagnosed with existing mental diseases and do not report clinically significant levels of symptoms. @*Methods@#The participants were 66 healthy young adults aged 20 to 40 recruited from October 2021 to March 2022.Cognitive function, maltreatment experience, emotion dysregulation and depressive symptoms were evaluated. Their association was analyzed using Kendell’s tau coefficient. In addition, multiple linear regression was conducted to explain emotion dysregulation using cognitive measures. @*Results@#As a results of Kendall’s tau coefficient calculation, emotional abuse experience showed a significant negative correlation with cognitive functions such as perceptual reasoning, working memory and processing speed. The degree of difficulty in emotion regulation reported a significant positive correlation with processing speed among cognitive functions. In the multiple linear regression analysis, processing speed among the cognitive function measures might be revealed to be a factor that can affect emotion regulation even after excluding the influence of other measures. @*Conclusions@#The results of this preliminary study suggest that certain maltreatment experiences, such as emotional abuse, can affect cognitive decline, even if there is no clear mental illness, and the cognitive function can be associated with difficulties in emotional control.
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Objective@#This study investigated the incidence and patterns of the acute coronary syndrome (ACS) after AAV diagnosis and searched for the predictors of ACS in a single-centre cohort of Korean patients diagnosed with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). @*Methods@#A total of 262 patients with AAV were included in this study. ST-segment elevation myocardial infarction (STEMI), non-STEMI (NSTEMI), and unstable angina (UA) were defined as ACS in this study. Only ACS that occurred during or after AAV diagnosis was counted. @*Results@#The incidence of ACS in patients with AAV was 2.7% (7 patients), and the most common type of ACS was NSTEMI regardless of the affected site or the number of coronary arteries. Five patients with ACS were diagnosed with microscopic polyangiitis (MPA) and all of them had myeloperoxidase (MPO)-ANCA (or perinuclear [P]-ANCA), whereas the remaining two patients were diagnosed with eosinophilic granulomatosis with polyangiitis (EGPA). Of the seven patients, 2 patients experienced ACS within the first year after AAV diagnosis, and 2 experienced ACS 5 years after AAV diagnosis. Among clinical variables, only the male sex was a predictor of ACS during the follow-up period in patients diagnosed with AAV. @*Conclusion@#The incidence of ACS was 2.7%, and the most common type of ACS was NSTEMI in Korean patients with AAV.