Publications by authors named "Fumiya Uchida"

Although percutaneous transluminal septal myocardial ablation (PTSMA) has been the established treatment of symptomatic patients with hypertrophic obstructive cardiomyopathy (HOCM), the efficacy for specific HOCM is not elucidated. We report a successful case of PTSMA for heart failure with severe left ventricular outflow tract (LVOT) obstruction due to sigmoid-shaped interventricular septum and diffuse left ventricular hypertrophy with Mönckeberg's arteriosclerosis and aortic valvular stenosis. While the PTSMA relieved LVOT obstruction and symptoms in the acute phase, the modest recurrence was confirmed 6 months later, which is rare in the case of idiopathic HOCM.

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The aim of this study was to evaluate the 5-year clinical outcomes of patients who underwent sirolimus-eluting stent implantation for chronic total occlusion (CTO). Among 10,759 patients treated exclusively with sirolimus-eluting stent in the j-Cypher registry, clinical outcomes were compared between 1,210 patients with revascularization for CTO and 9,549 patients with revascularization for non-CTO only. The cumulative 5-year incidence of all-cause death (13.

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A 71-year-old male was referred to another hospital for dizziness. A bradycardia -tachycardia syndrome and Cor triatriatum were detected, and an operation to resect the membrane in the left atrium and implant a pacemaker epicardially was performed. However, no suitable site could be found on either atria and therefore, a single chamber ventricular pacemaker was implanted.

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Radiofrequency (RF) catheter ablation of supraventricular tachycardias causes local parasympathetic denervation. This study used heart rate variability (HRV) to evaluate the effects of ablation of atrial tachycardia (AT) arising from the atrioventricular annulus (AVAT) on autonomic function. Ten patients with AVAT were referred for ablation (group AT) and compared with 8 patients with paroxysmal atrial fibrillation who underwent PV isolation (group Paf), and 13 patients with idiopathic ventricular tachycardia successfully treated by ablation (group VT).

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A 57-year-old woman had transient right hemiplegia 2 days after physical stress. An electrocardiogram exhibited T-wave inversion with QT prolongation. An echocardiogram revealed akinesia of the entire left ventricle except for the basal region.

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Background: Double potential (DP) activation patterns observed in coronary sinus (CS) electrograms recorded during left lateral atrial pacing, were explained by an initial low-frequency left atrial (LA) activation potential and secondary high-frequency CS musculature activation potential in canine hearts. Moreover, the connections between the LA and CS musculature vary greatly in size and location in the human heart. The purpose of this study was to investigate the relationship between the CS activation pattern during retrograde conduction via an accessory pathway (AP) and the location of left-sided APs.

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A 39-year-old Japanese woman presented with an idiopathic left ventricular aneurysm manifesting as recurrent episodes of palpitation. She was referred to our hospital for evaluation of sustained ventricular tachycardia. Echocardiography disclosed a dyskinetic well-defined wall bulge during both systole and diastole at the basal region of the interventricular septum, and reduced left ventricular wall thickness and severe hypokinesis at the anterolateral to posterolateral region.

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Atrial tachycardia (AT) arises from various sites in the atrium and the mechanisms are nonuniform. McGuire et al. reported that the cells around the atrioventricular annuli resembled nodal cells in their cellular electrophysiology.

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A 51 year-old Japanese man who had undergone surgical correction of an atrial septal defect at the age of 18 years old was referred to our institute for evaluation of his atrial arrhythmia. The conventional electrophysiological study was combined with a new technique utilizing an isopotential and isochronal mapping system (QMS) to visualize the electrical signals recorded with a 64-electrode basket catheter. Using this system, an intra-atrial reentrant tachycardia (IART) was demonstrated.

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Synopsis of recent research by authors named "Fumiya Uchida"

  • - Fumiya Uchida's research primarily focuses on the diagnosis and treatment of cardiac arrhythmias, particularly through advanced interventional techniques such as catheter ablation and the assessment of anatomical structures like the left ventricular summit and the coronary sinus musculature.
  • - His studies have highlighted the challenges and outcomes of ablation procedures for various heart conditions, including idiopathic ventricular arrhythmias and hypertrophic obstructive cardiomyopathy, demonstrating both immediate successes and potential long-term complications.
  • - Recent publications also explore unique cases, such as quadricuspid pulmonary valves and transient left ventricular ballooning, contributing to a deeper understanding of complex cardiac phenomena and enhancing the field's clinical knowledge base.