Predictors of outcome after catheter ablation for atrial fibrillation: Group analysis categorized by age and type of atrial fibrillation.

BACKGROUND: The outcome of catheter ablation could probably differ among patients with atrial fibrillation (AF), depending on age and AF type. We aimed to investigate the difference in predictors of outcome after catheter ablation for AF among the patient categories divided by age and AF type. METHODS AND RESULTS: A total of 396 patients with AF (mean age 65.69 ± 11.05 years, 111 women [28.0%]) who underwent catheter ablation from January 2018 to December 2019 were retrospectively analyzed. We divided the patients into four categories: patients with paroxysmal AF (PAF) or persistent AF (PeAF) who were 75 years or younger (≤75 years) or older than 75 years (>75 years). Kaplan-Meier survival analysis demonstrated that patients with PAF aged ≤75 years had the lowest AF recurrence among the four groups (log-rank test, p = .0103). In the patients with PAF aged ≤75 years (N = 186, 46.7%), significant factors associated with recurrence were female sex (p = .008) and diabetes (p = .042). In the patients with PeAF aged ≤75 years (N = 142, 35.9%), the only significant factor associated with no recurrence was medication with a renin-angiotensin system inhibitor (p = .044). In the patients with PAF aged >75 years (N = 53, 14.4%), diabetes was significantly associated with AF recurrence (p = .021). No significant parameters were found in the patients with PeAF aged >75 years (N = 15, 4.1%). CONCLUSIONS: Our findings indicate that the risk factors for AF recurrence after catheter ablation differed by age and AF type.

A frameshift variant in the EXT1 gene in a feline leukemia virus-negative cat with osteochondromatosis.

Osteochondromatosis is a benign proliferative disorder characterized by cartilage-capped bony protuberances. In humans and most mammals, variants in the EXT1 or EXT2 gene are strongly correlated with the etiology of osteochondromatosis. However, in cats, osteochondromatosis has only been associated with feline leukemia virus infection. In this study, to explore other factors involved in the etiology of feline osteochondromatosis, we examined the EXT1 and EXT2 genes in a feline leukemia virus-negative cat with osteochondromatosis. Genetic analysis revealed a heterozygous single base pair duplication in exon 6 of the EXT1 gene (XM_023248762.2:c.1468dupC), leading to a premature stop codon in the EXT1 protein. Notably, this frameshift variant is recognized as one of the most common pathogenic variants in human osteochondromatosis. Our data suggest for the first time that genetic variants can have etiologic roles in osteochondromatosis in cats, as in humans and other animals.

Comprehensive evaluation of three-dimensional anatomy of perigastric vessels using enhanced multidetector-row computed tomography.

BACKGROUND: To perform laparoscopic gastrectomy safely, we aimed to comprehensively re-evaluate perigastric vessel anatomies using a three-dimensional angiography reconstructed from enhanced multidetector-row computed tomography data. METHODS: Perigastric vessel anatomy was preoperatively analyzed using a multidetector-row computed tomography-based three-dimensional angiography reconstructed in 127 patients undergoing gastric surgery. RESULTS: Of the 67 left gastric veins that ran along the dorsal side of the arteries, 59 (88.1%) ran along the dorsal side of the common hepatic artery and flowed into the portal vein. In 18 cases, a common trunk of one to three left gastric arteries and the replaced left hepatic artery was observed. The left inferior phrenic artery ramified from the left gastric artery in 5.5% of the cases. The right gastric artery was classified into distal (73.2%), caudal (18.1%), and proximal (8.7%) types. The infra-pyloric artery was also classified into distal (64.6%), caudal (26.0%), and proximal (9.4%) types. The posterior gastric artery branched as a common trunk with the superior polar artery in the proximal (37.9%) and distal (18.4%) regions of the splenic artery. The left gastroepiploic artery ramified from the splenic (18.1%) and inferior terminal arteries (81.9%). No, one, and two gastric branches of the left gastroepiploic artery, which ramified between the roots of the left gastroepiploic artery and its omental branch, were found in 36.5%, 49.2%, and 14.3% of the cases, respectively. CONCLUSIONS: Preoperative 3D angiography is useful for the precise evaluation of perigastric vessel anatomies, and may help us to perform laparoscopic gastrectomy and robotic surgery safely.

Clinical Outcomes of Patients with Non-Small Cell Lung Cancer Leptomeningeal Disease Following Receipt of EGFR-Targeted Therapy, Immune-Checkpoint Blockade, Intrathecal Chemotherapy, or Radiation Therapy Alone.

BACKGROUND: EGFR-targeted therapy (ETT) and immune-checkpoint blockade (ICB) have shown promising results in treating NSCLC brain metastases (BM). However, little is known of their effect in treating leptomeningeal disease (LMD). PATIENTS AND METHODS: This is a retrospective review of 80 patients diagnosed with NSCLC LMD from January 2014 to March 2021. Patients were grouped based on initial LMD treatment: radiotherapy (RT) alone, ETT, ICB, and intrathecal chemotherapy (ITC). RESULTS: EGFR mutation was present in 22 patients (28%). Twenty patients had positive cytology in cerebrospinal fluid, while 60 patients were diagnosed based on MRI with clinical correlation. The RT alone group consisted primarily of whole brain radiation (n = 20; 77%), stereotactic radiation (n = 3; 12%), and palliative spine radiation (n = 2; 7%). There were no significant differences amongst the treatment groups in age, performance status, or neurologic symptoms. Overall, the 6-month overall survival (OS) and craniospinal progression free survival (CS-PFS) were 35% and 24%, respectively. The 6-month OS for the ETT, ICB, ITC, and RT alone groups was 64%, 33%, 57%, and 29% respectively (log-rank P = .026). The 6-month CS-PFS for the ETT, ICB, ITC, and RT alone groups was 43%, 33%, 29%, and 19% respectively (log-rank P = .049). Upon univariate analysis, receipt of ETT compared to RT alone reached significance for OS (HR 0.35, P = .006) and CS-PFS (HR 0.39, P = .013). CONCLUSIONS: The prognosis for patients with NSCLC LMD remains poor overall. However, the receipt of ETT for patients with EGFR-positive disease was associated with improved outcomes.

Role of computed tomography-based evaluation of skeletal muscle area in predicting cardiovascular outcomes in patients with chronic heart failure after cardiac resynchronization therapy.

AIM: This study aimed to determine possible associations between sarcopenia and poor cardiovascular outcomes in patients with chronic heart failure after cardiac resynchronization therapy. METHODS: This retrospective study evaluated 120 patients who underwent cardiac resynchronization therapy between March 2004 and June 2018. In total, 58 patients who underwent computed tomography within 30 days of cardiac resynchronization therapy implantation were eligible for inclusion, and their data were analyzed (25 women; 33 men; mean age 71.6 ± 8.7 years). Skeletal muscle area was measured at the third lumbar vertebra, and skeletal muscle index was calculated. Major adverse cardiovascular events included cardiovascular death, hospitalization due to heart failure, cerebral infarction, acute myocardial infarction and cardiac arrest. RESULTS: During the follow-up period (mean 868 ± 617 days), major adverse cardiovascular events occurred in 22 of 58 patients (38%). The patients were allocated to two groups according to sex-based tertiles of skeletal muscle index. The lowest tertile was defined as the low skeletal muscle index group. Kaplan-Meier survival analysis showed that the low skeletal muscle index group had a higher incidence of major adverse cardiovascular events (log-rank 4.38; P = 0.036). Cox proportional hazards regression analysis also showed that low skeletal muscle index values were significantly associated with major adverse cardiovascular events (hazard ratio 3.08; 95% confidence interval 1.26-7.66, P = 0.014). CONCLUSIONS: Decreases in skeletal mass index on computed tomography might predict the occurrence of major adverse cardiovascular events in patients with chronic heart failure who underwent cardiac resynchronization therapy. Geriatr Gerontol Int 2022; 22: 1013-1018.

Implication of B lymphocytes in endotoxin-induced hepatic injury after partial hepatectomy in rats.

BACKGROUND: Lymphocyte population constitutes major defense mechanism against endotoxemia, but the role of B lymphocytes in endotoxin-induced hepatic injury after hepatectomy is not clear. METHODS: We used lymphopenic (L(-)) rats by single administration of anti-rat lymphocyte serum, nu/nu athymic (T(-)) rats, B cell-ablated (B(-))rats by intermittent injection of anti-immunoglobulin (Ig) micro-chain from birth, and their vehicle controls. These animals were subjected to two-thirds hepatectomy with subsequent intravenous lipopolysaccharides (LPS, 1.5 mg/kg) administration. The survival rate, plasma alanine transaminase (ALT), tumor necrosis factor-alpha (TNF-alpha) and IgM levels, and total hemolytic activity (CH50) were determined. Hepatic tissue deposition of IgM or C3 was assessed with immunohistochemistry. RESULTS: The 24-h survival rate in control animals was 20%, whereas those in L(-), T(-), and B (-) animals were 80, 0, and 100%, respectively. Lymphocyte-sufficient control (L(+)) and B cell-sufficient control (B(+)) animals showed a rapid elevation of plasma TNF-alpha levels 1 h after the challenge, followed by an increase in plasma ALT levels. In B(+) group, plasma IgM levels were increased and CH50 activities were decreased 4 h after LPS injection with significant difference compared to those at time 0. Liver histology showed massive hepatic necrosis with a dense accumulation of IgM and C3 deposits 4 h after LPS administration. B cell ablation significantly ameliorated plasma ALT, IgM, and CH50 levels, showing less histological liver damage. CONCLUSION: B lymphocytes susceptible to LPS might be implicated in the development of endotoxin-induced hepatic injury after partial hepatectomy.

Refractory ulcerative colitis complicated by a cytomegaloviral infection requiring surgery: report of a case.

Cytomegalovirus (CMV) infection has been reported to be a cause of refractory ulcerative colitis (UC). We herein report a case of refractory ulcerative colitis complicated by CMV infection requiring surgery. A 22-year-old man was admitted to our hospital with lower abdominal pain and bloody diarrhea. Under a diagnosis of acute UC, he was treated with prednisone 60 mg/day and sulfasalazine. Since his symptoms appeared to improve, the prednisone dosage was gradually reduced to 20 mg/day. After 5 months, he had an unexpected flare-up with fever and fresh anal bleeding. Colonoscopy demonstrated a punched out ulcer in the sigmoid colon. Biopsies by colonoscopy revealed cytomegalic inclusion bodies. Serologic and immunologic studies also suggested a recent CMV infection. Under a diagnosis of intractable UC complicated by a CMV infection, ganciclovir therapy was carried out, and the steroid therapy was tapered. Although the serum antigenemia became negative after the antiviral therapy, follow-up colonoscopy confirmed the severe stenosis after the punched-out ulcer healed completely. Since his symptoms did not improve, it was necessary to perform an elective proctocolectomy despite antiviral therapy. He was discharged with an uneventful postoperative course. It is important to recognize CMV colitis as a complication of inflammatory bowel disease, particularly in severe steroid-resistant colitis. Furthermore, in cases which fail to respond to antiviral treatment, the patient may ultimately require surgery.