Objective: To evaluate the performance of the left atrial time-to-peak (TTP) derived from time-resolved magnetic resonance angiography (TR-MRA) as a noninvasive indicator of left atrial pressure (LAP) in patients with atrial fibrillation (AF). Materials and Methods: This retrospective study included 92 patients who underwent cardiac TR-MRA and catheter-based LAP measurements prior to catheter ablation for AF between January 2021 and December 2022. TR-MRA–derived TTP was measured in the left atrium using contrast-enhanced time-signal intensity curves. Catheter-based LAP measured during sinus rhythm served as the reference standard, with high LAP defined as ≥15 mmHg. Univariable and multivariable linear regression analyses were performed, with LAP as the dependent variable and echocardiographic parameters as covariates. The diagnostic performance of TTP for high LAP was evaluated using receiver operating characteristic (ROC) curve analysis. Results: Among the 92 patients (mean age ± standard deviation, 60 ± 10 years; 70 male), 70 (76.0%) had low LAP, and 22 (23.9%) had high LAP. Mean TTP was significantly longer in patients with high LAP than in those with low LAP (25.1 ± 6.9 s vs.16.9 ± 5.7 s, P < 0.001). In multivariable linear regression analysis, TTP remained independently associated with LAP (β = 0.46, P < 0.001). ROC analysis demonstrated good discriminative performance of TTP for identifying high LAP, with an area under the curve of 0.834 (95% confidence interval, 0.742–0.904). Using a TTP cutoff of >19.6 seconds, the sensitivity and specificity for identifying elevated LAP levels were 81.8% (18/22) and 75.7% (53/70), respectively. Conclusion TR-MRA–derived TTP showed a significant independent association with invasively measured LAP. It may serve as a reliable noninvasive imaging marker for identifying high LAP in patients with AF undergoing catheter ablation.

Background: Identifying the risks related to the complications of electrical cardioversion (ECV) can alert the determinaton of rhythm control in patients with atrial fibrillation (AF). Methods: We retrospectively reviewed 1,058 patients who underwent ECV for persistent or long-standing persistent AF/atrial flutter (AFL) from multiple centers. Patients were classified into the no-complication (1,023 patients) and complication (35 patients) groups based on the following major complications: stroke and/or systemic embolism (SSE), myocardial infarction, major bleeding, implantation of cardiac implantable electronic devices, ventricular tachycardia/fibrillation, and death at 1 year follow-up after ECV. Results: Compared with the no-complication group, the complication group exhibited a higher proportion of female patients (37% vs. 22%), as well as a higher proportion of patients with older age (67 ± 11 vs. 61 ± 10 years), diabetes mellitus (DM) (49% vs. 24%), heart failure (HF) (49% vs. 30%), SSE (23% vs. 9%), high CHA 2 DS 2 -VASc (CV) score (3.6 ± 1.8 vs.2.2 ± 1.4), low left ventricular ejection fraction (LVEF) (50 ± 16% vs. 58 ± 21%), and high left atrial volume index (LAVI) (51 ± 26 vs. 40 ± 20 mL/m 2 ). Class I and III antiarrhythmics were less prescribed in the complication group than in the no-complication group (57% vs.76%). Univariate analysis for complications revealed age (≥ 65 years), female sex, DM, HF, SSE, LVEF (< 50%), LAVI (≥ 40 mL/m 2 ), CV score (≥ 3), bradycardia on Holter (< 60/min), and no antiarrhythmics as risk factors. Among these, multivariate analysis revealed clinical significance of female sex and SSE. Conclusion Female sex and a history of SSE were the most important risk factors of complications in patients with persistent or long-standing persistent AF/AFL who underwent ECV.

Purpose: Chemo-port insertion is performed by a radiologist or surgeon in an interventional radiology (IR) suite or an operating room (OR). The complication rate is approximately 3%–4%. However, there is still a lack of data for comparison when it is performed in different conditions such as IR suite and OR. Methods: This study is for the safety of adult cancer patients after chemo-port implantation by comparing postoperative complication types and rates in different places. Among 375 patients who underwent chemo-port implantation, 203 patients underwent chemo-port implantation by radiologists in an IR suite, and 172 patients underwent the procedure by general surgeons in an OR. In both groups, early and late mortality were investigated. Early and late complication types and rates were also compared, and our study results were compared to the literature. Results: Patients’ characteristics showed no differences. Mortality after the procedure was 39 in OR vs. 72 in IR (P < 0.01).Early mortality at 7 days was 1 in IR, no patient in OR (P = 0.36). Catheter problems did not show a statistical difference in these 2 groups (1.16% vs. 0.49%, P = 0.47). Venous thrombosis happened in 4 and 7 (2.33% vs. 3.45%, P = 0.13), and the central line bloodstream infection was in 5 patients and 6 patients (2.91% vs. 2.96 %, P = 0.98), respectively. Skin problems were 6 and 7 (3.49% vs. 3.45 %, P = 0.98). Port site infection happened in 6 patients in each group (3.49% vs. 2.96 %, P = 0.77). Conclusion Chemo-port implantation can be performed in OR or IR without difference in complication rates.

Background and Objectives: Until now, apical hypertrophic cardiomyopathy (HCM) has been considered to have a benign prognosis in terms of cardiovascular mortality. The prevalence of sudden cardiac arrest and the current status of implantable cardioverter-defibrillator (ICD) implantations in patients with apical HCM remain to be elucidated. Methods: Between July 2001 and May 2021, 96 HCM patients who had undergone ICD implantations from 3 tertiary hospitals were reviewed. We evaluated the prevalence of apical HCM and the indication for an ICD implantation. Results: Fifteen patients (15.6%) had apical HCM and 81 (84.4%) the non-apical type including septal (n = 56) and diffuse (n = 25) types, respectively. Sixty-four patients (66.7%) received ICD implantations for primary prevention and 32 (33.3%) for secondary prevention.Among those with apical HCM, 7 patients (46.7%) presented with an aborted sudden cardiac death or documented ventricular fibrillation, therefore, they received ICD implantations for secondary prevention. The proportion of secondary prevention ICD implantations did not significantly differ between apical and non-apical HCM subtypes (46.7% [7/15] vs. 30.9% [25/81], P = 0.233). Conclusions The proportion of secondary prevention ICD implantations did not differ significantly by HCM subtype. ICD implantations should be considered for high-risk patients with apical HCM.

Phenylketonuria (PKU), an autosomal recessive genetic disorder, has been documented to exhibit over 950 distinct mutations. This condition primarily affects the metabolism of phenylalanine, which is affected by a deficiency in the hepatic enzyme phenylalanine hydroxylase. The optimal treatment for PKU disease remains to be determined, necessitating further research. The severity of the disease and the most effective treatment method vary depending on the specific mutation, which necessitates the development of personalized treatment strategies. In this study, we successfully established induced pluripotent stem cell (iPSC) lines from the blood of a PKU patient with the R243Q mutation via Sendai virus-based reprogramming (R243Q-iPSCs). The established R243Q-iPSCs exhibited characteristics of pluripotency, as confirmed through quantitative reverse transcription polymerase chain reaction, western blot, immunocytochemistry, and karyotype analysis. Furthermore, these iPSCs not only successfully differentiated into hepatocytes but also exhibited a complete PKU disease phenotype. These results provide a valuable foundation for PKU disease research, including physiological studies of PKU, gene therapy, drug screening, and the development of platforms for novel cell therapy approaches.

Objective: To determine the factors influencing the life satisfaction of people with physical disabilities during the COVID-19 pandemic, considering demographics, disability-related characteristics, health behaviors, and psychosocial characteristics. Methods: We used cross-sectional data from 301 respondents of the 2021/2022 survey of the Korean Health Cohort Study for People with Physical Disabilities. Descriptive statistics were used to analyze the research subjects’ characteristics, and chi-square tests and multiple logistic regression were used to identify the determinants of life satisfaction. Results: Among socio demographic variables, occupation had a strong association with life satisfaction. Significant health behavior variables included daily regular meals, weight control effort, and chronic pain. All psychosocial characteristics (perceived stress, depression, suicidal ideation, cognitive function assessment, subjective health status, family satisfaction, income satisfaction) were strongly associated with life satisfaction. Results of the analysis of factors affecting life satisfaction showed that unemployment, lack of regular exercise, elevated stress, suicidal thoughts, and dissatisfaction with family contributed to increased life dissatisfaction. Conclusion Economic support through job creation that considers the specific characteristics of people with disabilities, and social access through community integration services that encourage participation in social activities, should be prioritized.

Purpose: Intensive cytotoxic chemotherapy increases the risk of infection in patients with cancer by inducing bone marrow suppression and mucosal injury. Febrile neutropenia (FN) is the most important clinical adverse event in patients with cancer receiving cytotoxic chemotherapy. To prevent FN, standard precautions including hand and respiratory hygiene are generally recommended, but the exact effect of non-pharmacologic intervention has not been clearly proven in the clinical setting. We aimed to compare the incidence of FN between the pre-coronavirus disease 19 (COVID-19) era vs. the postCOVID-19 era. Methods: We retrospectively enrolled patients with breast cancer who received an adriamycin and cyclophosphamide (AC) regimen containing adjuvant chemotherapy at Jeju National University Hospital. We compared the incidence of FN between the pre- and post-COVID-19 period and analyzed characteristics of the event and other clinical risk factors. Results: In total, 149 patients were enrolled, including 94 who received AC chemotherapy in the pre-COVID-19 era and 55 who received it in the post-COVID-19 era. Sixteen patients (10.7%) experienced FN. Fourteen (14.9%) and 2 events (3.6%) occurred in pre-COVID-19 and post-COVID-19 eras, respectively. The post-COVID-19 era was the only risk factor for FN (P = 0.032). Conclusion We found an association between FN occurrence and the COVID-19 outbreak, providing indirect evidence of the importance of non-pharmacological measures to reduce FN risk in patients with breast cancer. Further research is required to confirm the standard precautions for FN prevention in patients with cancer.

Objective: To determine the factors influencing the life satisfaction of people with physical disabilities during the COVID-19 pandemic, considering demographics, disability-related characteristics, health behaviors, and psychosocial characteristics. Methods: We used cross-sectional data from 301 respondents of the 2021/2022 survey of the Korean Health Cohort Study for People with Physical Disabilities. Descriptive statistics were used to analyze the research subjects’ characteristics, and chi-square tests and multiple logistic regression were used to identify the determinants of life satisfaction. Results: Among socio demographic variables, occupation had a strong association with life satisfaction. Significant health behavior variables included daily regular meals, weight control effort, and chronic pain. All psychosocial characteristics (perceived stress, depression, suicidal ideation, cognitive function assessment, subjective health status, family satisfaction, income satisfaction) were strongly associated with life satisfaction. Results of the analysis of factors affecting life satisfaction showed that unemployment, lack of regular exercise, elevated stress, suicidal thoughts, and dissatisfaction with family contributed to increased life dissatisfaction. Conclusion Economic support through job creation that considers the specific characteristics of people with disabilities, and social access through community integration services that encourage participation in social activities, should be prioritized.

Objective: To determine the factors influencing the life satisfaction of people with physical disabilities during the COVID-19 pandemic, considering demographics, disability-related characteristics, health behaviors, and psychosocial characteristics. Methods: We used cross-sectional data from 301 respondents of the 2021/2022 survey of the Korean Health Cohort Study for People with Physical Disabilities. Descriptive statistics were used to analyze the research subjects’ characteristics, and chi-square tests and multiple logistic regression were used to identify the determinants of life satisfaction. Results: Among socio demographic variables, occupation had a strong association with life satisfaction. Significant health behavior variables included daily regular meals, weight control effort, and chronic pain. All psychosocial characteristics (perceived stress, depression, suicidal ideation, cognitive function assessment, subjective health status, family satisfaction, income satisfaction) were strongly associated with life satisfaction. Results of the analysis of factors affecting life satisfaction showed that unemployment, lack of regular exercise, elevated stress, suicidal thoughts, and dissatisfaction with family contributed to increased life dissatisfaction. Conclusion Economic support through job creation that considers the specific characteristics of people with disabilities, and social access through community integration services that encourage participation in social activities, should be prioritized.

Background: Atrial fibrillation (AF) is a prevalent cardiac arrhythmia associated with significant morbidity and mortality, posing a considerable burden on healthcare systems. In Republic of Korea, the prevalence and incidence of AF have increased in recent years. There have also been significant changes in the trends of antiarrhythmic drug (AAD) use and procedural treatments for AF. Objectives: This study aims to review the trends in AF treatment strategies in Republic of Korea, particularly focusing on the utilization of antiarrhythmic drugs and catheter ablation. Methods: The Korean National Health Insurance Service (K-NHIS) data were used to identify AF patients from 2013 to 2022. AAD usage and catheter ablation procedures were analyzed annually. AADs were classified into Class IC and III drugs. Trends in beta-blockers, calcium channel blockers, and digoxin prescriptions were also examined. The primary endpoint was the trend of AAD use and AF catheter ablation (AFCA) over 10 years. Results: In 2022, 940,063 patients had a prior diagnosis of AF. From 2013 to 2022, the use of AADs increased from 12.1 to 16.4% among prevalent AF patients. Beta-blockers were the most commonly prescribed rate control medication, while the use of calcium channel blockers and digoxin declined. The frequency of AFCA procedures also increased, from 0.5% of prevalent AF patients in 2013 to 0.7% in 2022. Younger patients, males, and those with lower CHA2DS2-VASc scores were more likely to receive AFCA. Regional variations in treatment patterns were observed, with Seoul exhibiting higher rates of procedural treatments and AAD prescriptions. Conclusions Over the past decade, there has been a significant increase in the use of AADs and AFCA procedures in Republic of Korea. These trends reflect recent advancements in AF management advocating a refined rhythm control strategy.