Publications by authors named "Junichi Funada"

A 79-year-old male with bronchiectasis was referred to our clinic because of mild chest tightness on exertion. He had no history of hemoptysis. An electrocardiogram showed ST segment depression in leads V5-6.

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Aims: Hypertension is a strong risk factor for heart failure with preserved ejection fraction. Curcumin has p300-specific histone acetyltransferase inhibitory activity, suppresses cardiomyocyte hypertrophy and fibrosis, and significantly reduces myocardial brain natriuretic peptide (BNP) expression without altering blood pressure in a rat model of hypertensive heart disease. This double-blind, placebo-controlled, randomized study, for the first time, aimed to examine the efficacy of a high-absorption curcumin for the prevention of hypertensive heart disease in humans.

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Background The impact of chronic kidney disease (CKD) on the prognostic utility of cardiovascular biomarkers in high-risk patients remains unclear. Methods and Results We performed a multicenter, prospective cohort study of 3255 patients with suspected or known coronary artery disease (CAD) to investigate whether CKD modifies the prognostic utility of cardiovascular biomarkers. Serum levels of cardiovascular and renal biomarkers, including soluble fms-like tyrosine kinase-1 (sFlt-1), N-terminal pro-brain natriuretic peptide (NT-proBNP), high-sensitivity cardiac troponin-I (hs-cTnI), cystatin C, and placental growth factor, were measured in 1301 CKD and 1954 patients without CKD.

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Aims: Endothelial cell vascular endothelial growth factor receptor 2 (VEGFR-2) plays a pivotal role in angiogenesis, which induces physiological cardiomyocyte hypertrophy via paracrine signalling between endothelial cells and cardiomyocytes. We investigated whether a decrease in circulating soluble VEGFR-2 (sVEGFR-2) levels is associated with poor prognosis in patients with chronic heart failure (HF).

Methods And Results: We performed a multicentre prospective cohort study of 1024 consecutive patients with HF, who were admitted to hospitals due to acute decompensated HF and were stabilized after initial management.

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Article Synopsis
  • The study investigates how smoking influences levels of growth differentiation factor 15 (GDF-15) and its relationship to mortality in patients with coronary artery disease.
  • Among 2,418 patients, never smokers had lower GDF-15 levels compared to former and current smokers, and high GDF-15 levels were linked to increased all-cause mortality across all smoking statuses.
  • GDF-15's predictive value regarding mortality was most relevant for never smokers, suggesting that smoking history affects its prognostic utility in this patient population.
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Article Synopsis
  • VEGF-D and VEGF-C are similar proteins linked to blood vessel development, but they interact with different receptors and have varying effects on mortality.
  • A study involving 2418 patients with coronary artery disease found that higher serum levels of VEGF-D significantly correlated with an increased risk of all-cause and cardiovascular death, but not with other major cardiovascular events.
  • The findings suggest that measuring VEGF-D could improve predictions of mortality risk in these patients, especially when combined with other clinical indicators.
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Objective: To establish a simple screening method for diabetes based on myoinositol (MI) in urine samples collected at home.

Research Design And Methods: Initially, we evaluated the stability of urinary MI (UMI) at room temperature (RT; 25°C) and 37°C in 10 outpatients with type 2 diabetes. We then enrolled 115 volunteers without a current or history of diabetes.

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Background: Metformin is the most widely used oral antihyperglycemic agent for patients with type 2 diabetes mellitus (T2DM). Despite the possible benefits of metformin on diabetes mellitus (DM) and heart failure (HF), acute or unstable HF remains a precaution for its use.

Objective: The aim of the present prospective randomized controlled trial was to assess whether metformin treatment has beneficial effects on patients with T2DM with hypertension without overt HF.

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Background The lymphatic system has been suggested to play an important role in cholesterol metabolism and cardiovascular disease. However, the relationships of vascular endothelial growth factor-C ( VEGF -C), a central player in lymphangiogenesis, with mortality and cardiovascular events in patients with suspected or known coronary artery disease are unknown. Methods and Results We performed a multicenter, prospective cohort study of 2418 patients with suspected or known coronary artery disease undergoing elective coronary angiography.

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Background: In patients who have atrial fibrillation (AF) with CHADS2score of 0-1 (categorized as low-to-intermediate risk), there is little information on stratifying the risk of stroke. This study aimed to determine whether impaired endothelial function assessed by reactive hyperemia-peripheral arterial tonometry (RH-PAT) predicted left atrial blood stagnation in these patients.

Methods and results: We enrolled 81 consecutive patients with nonvalvular AF.

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Purpose: Our recent report demonstrated that atrial electromechanical conduction time (EMT-ε) measured with speckle tracking echocardiography could predict cardiac events in patients with pathological left ventricular hypertrophy. This study aimed to validate EMT-ε by comparison with electroanatomical mapping and to investigate the clinical utility of EMT-ε in patients with atrial fibrillation (AF) undergoing catheter ablation.

Methods: Forty-six patients with preserved LV ejection fraction (LVEF ≥ 50%) undergoing pulmonary vein isolation (PVI) for AF were studied.

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Postcardiac injury syndrome (PCIS) occurs following a pericardial or myocardial injury. On the other hand, PCIS following cardiac catheter intervention is rare and can be difficult to diagnose because of its delayed onset. A 24-year-old man underwent radiofrequency ablation (RFA) for paroxysmal atrial fibrillation and suffered from general fatigue and left-sided pleural effusion three months after the procedure.

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Background: The aim of this study was to investigate the correlation of the qualitative transmural extent of hypoperfusion areas (HPA) using stress dynamic whole-heart computed tomography perfusion (CTP) imaging by 256-slice CT with CTP-derived myocardial blood flow (MBF) for the estimation of the severity of coronary artery stenosis.

Methods And Results: Eleven patients underwent adenosine triphosphate (0.16 mg/kg/min, 5 min) stress dynamic CTP by 256-slice CT (coverage: 8 cm, 0.

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Background: The interventricular septum in hypertrophic cardiomyopathy (HC) has a unique shape, which is characterized by the convex curvature toward the left ventricle (LV). The aim of this study was to examine the relationship between curvature of the LV wall and regional myocardial strain.

Methods And Results: Fifty-six patients with HC (mean age, 55±12 years) and 20 age- and sex-matched control subjects (mean age, 56±8 years) were enrolled.

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Aims: Several studies have demonstrated that type 2 diabetes mellitus (T2DM) is associated with accelerated atherosclerosis, which results in an increased risk of coronary vascular events. However, serial changes in plaque characteristics have not been reported in vivo. We evaluated the progression of coronary atherosclerosis in patients with T2DM using an integrated backscatter intravascular ultrasound (IB-IVUS) examination.

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Background: Two-dimensional speckle tracking echocardiography (2D-STE) is a novel technology that directly measures regional left ventricular (LV) wall contraction. This study aimed to directly measure inner-layer thickening (radial strain) of the LV using 2D-STE, and to examine the relationship between radial strain and the degree of hypertrophy.

Methods: The study enrolled 63 untreated hypertensive patients with normal geometry (N group, n=32) or concentric hypertrophy (CH group, n=31), classified according to LV mass index (LVMI) and relative wall thickness (RWT).

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Background: Right ventricular (RV) pacing alters left ventricular (LV) mechanical activation, resulting in adverse impacts on LV function. This study was aimed to investigate the acute effect of RV apical (RVA) and septal pacing (RVS) on LV dyssynchrony and function using speckle tracking echocardiography.

Methods And Results: The 103 patients (749 years) with symptomatic bradyarrhythmia and preserved LV ejection fraction, and 50 age-matched control subjects were studied.

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The aim of this study was to investigate the relationship between late gadolinium enhancement (LGE) and the effect of cibenzoline (CBZ) on left ventricular (LV) diastolic function in hypertrophic cardiomyopathy (HCM) patients. Echocardiography before and after intravenous CBZ (1.4 mg/kg over 5 minutes) and magnetic resonance imaging (MRI) were performed in 22 consecutive patients with HCM [mean age: 65 ± 14 years, obstructive HCM: 14, nonobstructive HCM (HNCM): 8].

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Background: The aim of this study was to investigate the significance of the MOSAIC (measurement of stenosis by aliasing coronary flow) method for the detection of proximal left coronary stenosis in patients with unstable angina (UA) using transthoracic Doppler echocardiography (TTDE).

Methods: Patients (n=107) with UA were evaluated. Proximal left coronary flow was sought in the short axis (SAX) at the aortic root level using color Doppler guidance.

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Appropriate blood vessel function is important to cardiovascular health. Adipose tissue plays an important role in metabolic homoeostasis, and subcutaneous abdominal ATBF (adipose tissue blood flow) is responsive to nutritional stimuli. This response is impaired in obesity, suggesting parallels with endothelial function.

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Background: The aim of this study was to investigate the differences in left ventricular (LV) twisting behavior between patients with hypertrophic cardiomyopathy (HCM) and hypertensive heart disease (HHD).

Methods: Forty-four patients with HCM (mean age, 63±15 years), 35 patients with HHD (mean age, 63±13 years) and 20 age and sex-matched control subjects were evaluated. After a standard echocardiographic examination, LV twist and twisting velocity profiles from apical and basal short-axis images were analyzed using two-dimensional speckle tracking imaging.

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Augmentation index (AI), brachial-ankle pulse wave velocity (baPWV) and cardio-ankle vascular index (CAVI) are available for the assessment of arterial stiffness in clinical practices. However, influences of meal intake on these indices are still poorly understood. The aim of this study is to elucidate the effects of daily meal intake on pulse wave indices in patients with type 2 diabetes.

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The patient was a 37-year-old female who had undergone a repair for tetralogy of Fallot (TOF) at the age of 4 years. Postoperative pulmonary stenosis remained, but she continued to be managed medically. Approximately 3 years ago, at the age of 34, she exhibited a worsening of fatigue and dyspnea during exertion (New York Heart Association III), and was therefore hospitalized for a detailed examination.

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Technologies associated with cardiac resynchronization therapy (CRT) devices and lead systems have progressed. However, dislocation after coronary sinus (CS) lead placement continues to be a problem. Furthermore, CS lead positioning at the site of the ventricular latest activation (detected by echocardiography) is often problematic due to large vessel size leading to the lead placement (wedge site) near the apical site.

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