A5067589119- Cardiovascular Function and Risk Factors
- Heart Failure Treatment and Management
- Sports Performance and Training
- Cardiac pacing and defibrillation studies
- Cardiac Arrhythmias and Treatments
- Cardiovascular and exercise physiology
- Cardiac Imaging and Diagnostics
- Cardiac Valve Diseases and Treatments
- Sports injuries and prevention
- Atrial Fibrillation Management and Outcomes
- High Altitude and Hypoxia
- Cardiac electrophysiology and arrhythmias
- Hemodynamic Monitoring and Therapy
- Heart Rate Variability and Autonomic Control
- Pulmonary Hypertension Research and Treatments
- Exercise and Physiological Responses
- Cardiac Structural Anomalies and Repair
- Sepsis Diagnosis and Treatment
- Cardiomyopathy and Myosin Studies
- Diabetes Treatment and Management
- Winter Sports Injuries and Performance
- Blood Pressure and Hypertension Studies
- Nutrition and Health in Aging
- Occupational Health and Performance
- Sarcoidosis and Beryllium Toxicity Research
University of Tsukuba
2016-2025
Kyoto University
2025
University of Tsukuba Hospital
2014-2023
Nagoya City University
2023
Fujita Health University
2023
Okinawa Prefectural Chubu Hospital
2023
Gifu University Hospital
2023
Fujita Health University Hospital
2023
Teikyo University
2023
Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA)
2022
Three-dimensional speckle tracking imaging (3D-STI) has been introduced to assess regional left ventricular (LV) myocardial function. This study was designed validate LV strain measurements by 3D-STI against data obtained sonomicrometry.In each of 10 anesthetized sheep, sonomicrometry crystals were implanted on the endocardium and epicardium at basal, mid, apical anterior lateral walls. sets from approach a frame rate approximately 30 frames/s. Segmental longitudinal (LS), radial (RS),...
In patients with atrial fibrillation (AF), most thrombus forms in the left appendage (LAA). However, relation of LAA morphology is unknown.We prospectively enrolled 633 consecutive who were candidates for catheter ablation symptomatic drug-resistant AF. Transesophageal echocardiography (TEE) was performed to assess thrombus. structure assessed by 3-dimensional TEE. orifice area, depth, volume, and number lobes measured on reconstructed images. Clinical characteristics echocardiographic...
Background: Although 2-dimensional strain analyses based on speckle tracking echocardiography have been used to detect myocardial deformation, the prognostic impact of is unclear in patients with acute decompensated heart failure (HF). We investigated whether left ventricular and right (RV) parameters assessed by provide incremental information hospitalized because HF. Methods Results: Six hundred eighteen (age, 72±13 years; 38% women; ejection fraction, 46±16%) for HF underwent clinical...
Abstract Aims The objective of the study was to evaluate whether geriatric nutritional risk index (GNRI) at discharge may be helpful in predicting long‐term prognosis patients hospitalized with heart failure (HF) preserved ejection fraction (HFpEF, left ventricular ≥50%), a common HF phenotype elderly. Methods and results Overall, 110 elderly HFpEF (≥65 years) from Ibaraki Cardiovascular Assessment Study‐HF ( n = 838) were enrolled. mean age 78.5 ± 7.2 years, male accounted for 53.6% 59)....
The long-term effects of catheter ablation (CA) on the left atrium and atrial appendage (LAA) are unknown in persistent fibrillation (AF). This study investigated (LA) reverse remodeling evolution LA/LAA function after successful CA for AF identified predictors maintenance sinus rhythm (SR) LA remodeling.CA was performed 123 patients with AF. volumes, strain LAA wall velocity were assessed both at baseline 12 months ablation. Patients who maintained SR divided into 2 groups according to...
Background:Left atrial remodeling caused by persistent fibrillation (AF) causes functional mitral regurgitation (MR), even though left ventricular (LV) and organic changes of the leaflets are lacking. The detailed mechanism MR has not been fully investigated.
Summary It has been reported that exercise under hypoxic conditions elevates acute growth hormone secretion after compared with normoxic conditions. This study examined the influence of resistance training moderate on muscle thickness, strength and hormonal responses. Thirteen healthy men were assigned into two groups matched for physical fitness level then randomized performed (FiO 2 = 20·9%) or 12·7%) Three sets elbow extensions unilateral arm to exhaustion at a workload 10 repetition...
To validate intramural strain measured by a speckle tracking imaging (STI) system against that sonomicrometry crystals. In 11 anaesthetized sheep, six sets of three crystals were implanted in endo-, mid-wall, and epimyocardium on the anterior lateral walls. Circumferential (CS) was calculated at layers from epicardial speckle. Radial (RS) assessed for inner outer halves myocardium. We compared ultrasound-derived measurements those baseline during pharmacological stress coronary occlusion....
It remains uncertain whether diabetes itself causes specific echocardiographic features of myocardial morphology and function in the absence hypertension or ischemic heart disease. The purpose present study was to determine characteristics pure diabetic cardiomyopathy-related using layer-by-layer evaluation with strain echocardiography.We enrolled 104 patients poorly controlled type 2 mellitus (mean HbA1c level, 10%) (n=74) without (n=40) 24 age- sex-matched healthy volunteers. Patients...
Background In the population with cardiac sarcoidosis (CS), approximately one third lacks extracardiac involvement and is considered to have isolated CS. Recently, Japanese Circulation Society updated diagnostic criteria for CS, providing a methodology diagnosing We aimed assess characteristics of CS diagnosed using multimodal imaging approach according guidelines. Methods Results retrospectively identified 161 consecutive patients who underwent 18F-fluorodeoxyglucose positron emission...
One of the most promising applications high temperature superconducting motors is as traction for electric aircrafts. However, although optimization stator slot shape has a significant effect on characteristics motor, no effective design method yet been proposed. In this study, slots induction/synchronous motor with maximum output 20 MW were designed using called self-assembling method. Using above results, two-dimensional electromagnetic was carried out, which simultaneously achieved power...
Background: The aim of this study was to carry out 3-dimensional speckle tracking imaging (3DSTI) the right ventricle (RV) and evaluate RV regional wall deformation. Methods Results: 3DSTI performed in 35 normal subjects, 8 patients with arrhythmogenic ventricular cardiomyopathy, pulmonary arterial hypertension. Peak systolic area change ratio contraction timing relative global time (time peak strain/time end-systole×100) were measured each segment. Good-quality images acquired inflow...
Abstract Background Intrarenal venous flow (IRVF) patterns assessed using Doppler renal ultrasonography are real-time bedside visualizations of vein hemodynamics. Although this technique has the potential to detect congestion during sepsis resuscitation, there have been few studies on method. We aimed examine relationship between IRVF patterns, clinical parameters, and outcomes in critically ill adult patients with sepsis. hypothesized that discontinuous was associated elevated central...