Masumi Iwai‐Takano

ORCID: 0000-0002-0698-4560
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About
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Research Areas
  • Cardiovascular Function and Risk Factors
  • Cardiac Imaging and Diagnostics
  • Cardiac Valve Diseases and Treatments
  • Cardiac Structural Anomalies and Repair
  • Atrial Fibrillation Management and Outcomes
  • Pericarditis and Cardiac Tamponade
  • Infective Endocarditis Diagnosis and Management
  • Heart Rate Variability and Autonomic Control
  • Cardiovascular Disease and Adiposity
  • Advanced MRI Techniques and Applications
  • Heart Failure Treatment and Management
  • Cardiomyopathy and Myosin Studies
  • Aortic aneurysm repair treatments
  • Aortic Disease and Treatment Approaches
  • Lipoproteins and Cardiovascular Health
  • Angiogenesis and VEGF in Cancer
  • Cardiovascular and Diving-Related Complications
  • Ultrasound Imaging and Elastography
  • Cardiac electrophysiology and arrhythmias
  • Cardiovascular Health and Disease Prevention
  • Cardiac tumors and thrombi
  • Cell Adhesion Molecules Research
  • Cardiac and Coronary Surgery Techniques
  • Potassium and Related Disorders
  • Cardiac pacing and defibrillation studies

Ohu University
2023-2024

Fukushima Medical University
2012-2024

Tohoku University
2021-2024

Fukushima University
2014-2016

Fukushima Medical University Hospital
2015

The University of Texas at San Antonio
2009

Tochigi Medical Center
1982-1988

Background: The recently developed real-time 3-dimensional echocardiography (RT3DE) is a promising imaging method to quantify cardiac chamber volumes and their functions in clinical practice. However, normal reference values of RT3DE parameters have not been fully investigated large, healthy Japanese population. Methods Results: This study consisted 410 subjects aged from 20 69 years who had at one the 23 collaborating institutions. All no history disease risk factors. mean men women were as...

10.1253/circj.cj-11-1256 article EN Circulation Journal 2012-01-01

Understanding the influence of both genetics and environment on human health, especially early in life, is essential for shaping long-term health. Here, we utilize a nationwide prospective birth cohort, Japan Environment Children's Study (JECS), to conduct large-scale population-based genetic study using biannual questionnaire surveys biological physical measurements collected from parents their children since participant mothers were pregnant. Analyses genome-wide genotyping 80,638 child...

10.1101/2025.02.18.25322458 preprint EN medRxiv (Cold Spring Harbor Laboratory) 2025-02-20

The current study was undertaken to clarify the relationship between cerebral/arterial embolism and morphology of left atrial thrombi. Forty-one patients with fibrillation thrombi were followed for 1 year, using transesophageal echocardiography (TEE) how shape, site, movability, number maximum dimension are related embolism. Left classified by their shape movability into movable ball (MB) type (n=13), fixed (FB) (n=17) mountain (MN) (n=11). also location interior section (n=3), middle (n=8),...

10.1253/jcj.64.411 article EN Japanese Circulation Journal 2000-01-01

Abstract OBJECTIVES The aim of this study was to evaluate the 18-year results emergency operations for acute type A aortic dissection, especially in octogenarians. METHODS We reviewed 199 patients who underwent surgical repair an dissection from January 2001 December 2018. If primary entry existed ascending aorta, we limited extent replacement within aorta. analysed early and late outcomes identified predictive factors in-hospital death difficulty direct discharge home. RESULTS hospital...

10.1093/ejcts/ezaa195 article EN European Journal of Cardio-Thoracic Surgery 2020-05-11

Abstract Previously, we proposed an ultrasonic measurement method of arterial wall elasticity for the early detection arteriosclerosis. Since vascular depends on blood pressure, in this study, and viscosity were estimated using hysteresis loop determined between incremental strain internal pressure by altering phantom vivo experiments. Consequently, both increased with pressure. Moreover, slope each was larger than that approximated curve lowest pressures loops different pressures, as...

10.35848/1347-4065/acbf5d article EN Japanese Journal of Applied Physics 2023-02-27

A patient had multiple myeloma and associated cardiac amyloidosis, which caused diastolic dysfunction recurrent ventricular fibrillation. After implantation of a cardioverter-defibrillator (ICD), the underwent autologous peripheral blood stem cell transplantation (PBSCT). The life-threatening arrhythmias, such as fibrillation, disappeared, assessed by quantitative gated single photon emission computed tomography Doppler echocardiography improved 7 months later. This may be first report to...

10.1253/circj.72.331 article EN Circulation Journal 2008-01-01

Abstract Background Kinking of the internal carotid artery is a cardiovascular (CV) risk factor. However, it remains unclear as to whether kinking common (CCA) can also predict CV events. We conducted long‐term follow‐up study examine CCA assessed by ultrasonography predictor events in asymptomatic patients with factors. Methods enrolled 598 (mean age, 66.8 ± 11.8 years) who were divided into two groups according severity: 0–29° (Group I); and at ≥30° II). predicts during follow‐up. Results...

10.1111/echo.14536 article EN Echocardiography 2019-11-23

The aim of this study was to assess potential predictors aortic events after an emergency surgery for acute type A dissection, especially paying attention the findings computed tomography (CT) performed immediately surgery.Between January 2001 and December 2015, 72 patients, who were diagnosed as having Stanford dissection with a patent false lumen in descending thoracic aorta, survived operation, had postoperative CT scan data, included (mean follow-up, 8.2 ± 3.8 years; range 0.8-17.4...

10.1016/j.xjon.2022.02.025 article EN cc-by-nc-nd JTCVS Open 2022-02-25

It is very important to prevent embolisms from left atrial thrombi (LAT). The present study was a trial for the management of patients with AT using 122 fibrillation and LAT who were followed 1 year after transesophageal echocardiography. classified by their shape mobility into mobile ball type (MB, n=28), fixed (FB, n=32) mountain (MO, n=42). given warfarin (INR: 1.5-2.0, n=43), aspirin 81 mg (n=74) and/or ticlopidine 200 mg/day (n=31). embolic rate (ER) in MB group significantly higher...

10.1253/circj.67.203 article EN Circulation Journal 2003-01-01

This case report presents a patient with Takotsubo cardiomyopathy (TCM) and complete atrioventricular (AV) block who was treated permanent pacemaker implantation. A 78-year-old woman history of hypertension presented 6-month palpitations. On initial evaluation, her heart rate 40 beats/minute. Electrocardiography revealed AV T-wave inversion in these leads: I, II, aVL, aVF, V3–6. Echocardiography showed akinesis from the midventricle to apex hyperkinesis on basal segments. The diagnosed TCM...

10.1155/2021/6637720 article EN cc-by Case Reports in Cardiology 2021-04-02

We describe a 40-month-old male infant with renal failure, treated peritoneal dialysis, who developed massive calcification of soft tissues including the heart and lungs subsequent cardiopulmonary insufficiency. A diagnosis Jeune syndrome was made. After starting patient exhibited an intractable metabolic acidosis unknown etiology necessitating treatment intravenous or oral sodium bicarbonate. Myocardial first detected by 2-dimensional echocardiography performed 3 months after dialysis. The...

10.5414/cnp63313 article EN Clinical Nephrology 2005-04-01

The aim of this study was to assess whether mast cells are involved in the recovery diminished cutaneous blood flow (CBF) by bone marrow cell transplantation (BMCT) limb arterial occlusion. In a hindlimb ischemia model, CBF measured laser Doppler perfusion imaging White spot (Ws) rats which genetically lack cells, and their wild-type with or without BMCT. After 14 days, tissue density assessed toluidine blue staining. To evaluate angiogenesis, we also determined CD 31-positive capillary...

10.1536/ihj.50.247 article EN International Heart Journal 2009-01-01

Background The relationships between flow reserves in coronary and peripheral circulation their modification by statin therapy have not been assessed the same patients, especially females. Methods Results To assess effect of pravastatin on both circulation, 20 postmenopausal female patients with hypercholesterolemia but a low probability artery disease, forearm blood reserve (FBFR) using plethysmographic method velocity (CFVR) Doppler echocardiography were measured before, 4 8 weeks after...

10.1253/circj.71.954 article EN Circulation Journal 2007-01-01

The scintigraphic perfusion defect size (DS) at 1 week after acute myocardial infarction (AMI) predicts remote left ventricular (LV) volumes and LV ejection fraction (LVEF). present study examined whether LVEF 6 months AMI may be better predicted by the combination of just reperfusion, DS week, in patients with Thrombolysis In Myocardial Infarction (TIMI) grade III reperfusion percutaneous coronary intervention.In 48 TIMI quantitative gated SPECT (QGS) was performed AMI. end-diastolic volume...

10.1253/circj.72.226 article EN Circulation Journal 2008-01-01

Medical treatment for heart failure is still limited in patients with symptomatic aortic regurgitation (AR). Here we report the effects of mokuboito used combination standard medical therapy an inoperable patient severe AR. We observed acute decreasing systemic vascular resistance and increasing cardiac output, as well its chronic improving New York Heart Association class, plasma brain natriuretic peptide levels, left ventricular diastolic function. Given efficacy, use might be additional failure.

10.5387/fms.2019-05 article EN FUKUSHIMA JOURNAL OF MEDICAL SCIENCE 2019-01-01

Abstract Myocardial fibrosis, as detected by late gadolinium enhancement (LGE) magnetic resonance imaging (MRI), is related to mortality after aortic valve replacement (AVR). This study aimed determine whether LGEMRI predicts improvement in global longitudinal strain (GLS) AVR patients with severe stenosis (AS). Twenty-nine AS who were scheduled undergo enrolled. Two-dimensional echocardiography and contrast-enhanced MRI performed before AVR. GLS LGEcore (g: > 5 SD of normal area),...

10.1038/s41598-019-51930-2 article EN cc-by Scientific Reports 2019-10-30

The deviation of the power-weighted center echo signal from geometric within velocity estimation window for calculating strain rate (SR) causes an error. This study aimed to confirm whether erroneous multilayer pattern in SR distribution left ventricular wall could be corrected by considering signal.

10.1016/j.ultrasmedbio.2024.01.014 article EN cc-by Ultrasound in Medicine & Biology 2024-02-26
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