Publications by authors named "Daimon M"

Unlabelled: A 60-year-old woman with a recent history of presumed cardiogenic cerebral infarction was referred for surgical removal of a left ventricular mass. She was diagnosed with Fabry disease eight years before. Transthoracic echocardiography showed a mobile echogenic mass in the left ventricular apex.

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Post-induction hypotension (PIH) during general anesthesia is a serious concern due to its high incidence and association with adverse postoperative outcomes and prognosis. We prospectively enrolled consecutive 1,603 patients scheduled for non-cardiac and cardiac surgery under general anesthesia. The primary outcome was defined as the lowest mean blood pressure from induction of general anesthesia to the start of surgery: post-induction blood pressure (PIB).

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Article Synopsis
  • The study focuses on establishing reference values for the tricuspid annulus (TA) geometry in a Japanese population, which is important for tricuspid valve surgery related to tricuspid regurgitation (TR).
  • Using 3D echocardiography, researchers analyzed data from 96 healthy Japanese subjects and found that TA area and circumference strongly correlate with body surface area, while age has a weaker correlation.
  • Gender differences in TA geometry were significant in younger subjects, with males showing larger TA area and smaller diameters compared to females, but these differences lessened with age.
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  • The study focuses on enhancing deep neural network algorithms in medical applications, particularly in electrocardiography (ECG) analysis for detecting left ventricular systolic dysfunction (LVSD).
  • Researchers applied self-supervised learning through masked autoencoders (MAEs) and pretrained Vision Transformer (ViT) models using limited ECG data from The University of Tokyo Hospital.
  • The MAE-based models achieved significantly better performance in detecting LVSD compared to other methods, showing strong results across multiple external validation datasets and maintaining high accuracy on benchmark datasets.
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Downhill esophageal varices often develop because of venous hypertension caused by either superior vena cava obstruction or compression. We herein present a case of downhill esophageal varices caused by a giant goiter in a patient with postoperative Graves' disease. A 66-year-old man presented with an enlarged goiter.

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This study aims to develop a new heart failure with preserved ejection fraction (HFpEF) diagnostic algorithm tailored to Asian populations, addressing limitations of current diagnostic models. Existing HFpEF diagnostic algorithms primarily target patients with dyspnea and metabolic comorbidities, such as obesity, which are more prevalent in Western populations. However, in Asian countries, HFpEF cases are less frequently associated with obesity, leading to less prominent dyspnea and more noticeable symptoms such as fatigue.

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  • A study examined the relationship between changes in arterial stiffness and left ventricular (LV) remodeling over time in 317 participants without cardiovascular disease.
  • Results indicated that increased arterial stiffness, measured by cardio-ankle vascular index (CAVI), was linked to impaired LV global longitudinal strain (LVGLS), an important indicator of heart function.
  • Notably, this association was observed primarily in women, highlighting that vascular health may significantly influence heart function even in early stages, contributing to heart failure risk.
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  • - The study explored how body fat distribution affects left atrial (LA) size and its potential to reverse in nonobese atrial fibrillation (AF) patients, revealing a link between central fat and LA remodeling.
  • - A total of 116 nonobese AF patients underwent catheter ablation, and measures like body mass index (BMI) and waist-to-hip (W/H) ratio were analyzed alongside fat percentages to see their impact on LA volume changes over six months.
  • - Results showed that higher W/H ratios and central fat percentages were associated with ongoing LA enlargement post-ablation, emphasizing the need to evaluate body fat distribution, even in patients who are not obese.
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Background: Gastric conduit necrosis (GCN) after esophagectomy is a serious complication that can prove fatal. Herein, we report a rare case of GCN with a severe course that improved with conservative treatment.

Case Presentation: We present the case of a 78-year-old male patient who underwent an Ivor Lewis esophagectomy and developed a massive GCN.

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Background: Age-related changes in left ventricular (LV) structure and function lower the threshold for the onset of heart failure with preserved ejection fraction (HFpEF). LV parameters change also with race; however, the racial differences in age-related changes in LV parameters with and without adjustment for body mass index (BMI), heart rate (HR), and blood pressure (BP) remain unclear.

Methods And Results: We performed a subanalysis of the World Alliance Society of Echocardiography Normal Values Study, an international cross-sectional study that examined normal echocardiographic values in 15 countries.

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We herein report a patient with herpes zoster (HZ), severe hyponatremia, and hypokalemia. Syndrome of inappropriate antidiuresis (SIAD) leads to euvolemic hyponatremia and hypoosmotic plasma due to inadequate diuresis. Hyponatremia in the current patient was caused by SIAD and associated with HZ of the trigeminal facial nerve (V1).

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Cardiac discomfort has been reported periodically in COVID-19-vaccinated individuals. Thus, this study aimed to evaluate the role of myocardial strains in the early assessment of the clinical presentations after COVID-19 vaccination. Totally, 121 subjects who received at least one dose of vaccine within 6 weeks underwent laboratory tests, electrocardiogram (ECG), and echocardiogram.

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Background: Coronary artery bypass grafting (CABG) using the right gastroepiploic artery (RGEA) is a well-established, safe procedure. However, problems with RGEA grafts in subsequent abdominal surgeries can lead to fatal complications. This report presents the first case of right hepatectomy for hepatocellular carcinoma after CABG using the RGEA.

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Background: Convolutional neural networks (CNNs) have emerged as a novel method for evaluating heart failure (HF) in adult electrocardiograms (ECGs). However, such CNNs are not applicable to pediatric HF, where abnormal anatomy of congenital heart defects plays an important role. ECG-based CNNs reflecting neurohormonal activation (NHA) may be a useful marker of pediatric HF.

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Duchenne muscular dystrophy (DMD) is an intractable X-linked myopathy caused by dystrophin gene mutations. Patients with DMD suffer from progressive muscle weakness, inevitable cardiomyopathy, increased heart rate (HR), and decreased blood pressure (BP). The aim of this study was to clarify the efficacy and tolerability of ivabradine treatment for DMD cardiomyopathy.

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Bronchogenic cysts are congenital malformations of the bronchial tree, detected as a cystic and/or mass lesion in the thoracic cavity. Although it occurs in distant locations, such as skin and retroperitoneum, to the best of our knowledge, little is known about the components and phenotypes of the epithelium that line a bronchogenic cyst in rare sites. The present study reviewed 34 bronchogenic cysts that were surgically resected at Osaka Medical and Pharmaceutical University Hospital (Osaka, Japan) from January 1998 to December 2020.

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Background: Atrial fibrillation (AF) progression is closely related to heart failure occurrence, and catheter ablation carries a beneficial effect for heart failure prevention. Recently, particular attention has been given to left atrial (LA) function and functional reserve in the pathogenesis linking AF and heart failure, although its significance and reversibility is not well studied.

Methods And Results: We prospectively investigated 164 patients with AF with normal left ventricular systolic function and free from heart failure who underwent first catheter ablation and pre-/postprocedural echocardiography.

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We describe a technique to repair ischemic ventricular septal rupture via a left ventriculotomy. It employs a large endoventricular patch as a "lining" over the locally patched septal defect and the free wall defect which is going to be roofed with an external patch. Both defects are then closed in double layers, holding a single continuous patch.

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Although accurate assessment of right ventricular (RV) morphology and function is clinically important, data regarding reference values for echocardiographic measurements of the right ventricle in the Japanese population are limited. The World Alliance Society of Echocardiography (WASE) Normal Values Study was conducted to examine normal echocardiographic values in 15 countries. Using the WASE study database, we analyzed 2-dimensional echocardiographic parameters of RV size and systolic function in 192 healthy Japanese individuals and compared them with those obtained from 153 healthy American individuals.

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Article Synopsis
  • Left heart abnormalities can lead to heart failure, but traditional echocardiography isn't always accessible; hence, wearable devices that record ECGs might help in identifying these issues.* -
  • Researchers created models using data from over 229,000 ECG and echocardiography pairs to detect specific heart conditions like low ejection fraction and left ventricular hypertrophy, achieving high accuracy rates in their predictions.* -
  • The models demonstrated performance either better or comparable to that of cardiologists analyzing standard 12-lead ECGs, suggesting they could be a valuable tool for remote heart health monitoring.*
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