Publications by authors named "Toshiko Konda"
Mitral annular disjunction is a structural abnormality of the mitral annulus fibrosus, which has been described by pathologists to be associated with mitral leaflet prolapse. Mitral annular disjunction is a common finding in patients with myxomatous mitral valve diseases. The prevalence of mitral annular disjunction should be checked routinely during presurgical imaging.
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- - The study explores mitral annular disjunction, a structural issue linked to mitral valve prolapse (MVP), in patients suffering from severe mitral regurgitation (MR), finding it in 24% of the examined group.
- - Researchers analyzed 185 patients with severe MR from 2009 to 2010, identifying that the majority of prolapses occurred in the posterior leaflet and establishing a disjunction distance of ≥2 mm for diagnosis.
- - Over a 20.3-year follow-up, 3.8% of patients experienced arrhythmic events or sudden death, highlighting the importance of assessing the presence and location of mitral annular disjunction in patients with fibroelastic deficiency. *
Article Synopsis
- The study aimed to understand the link between electrocardiography (ECG) findings and papillary muscle hypertrophy, emphasizing the significance of these muscle measurements in echocardiograms.
- Among 237 patients with left ventricular hypertrophy (LVH) seen on ECG, 101 had available echocardiographic data, revealing a higher prevalence of papillary muscle hypertrophy in those without LV strain patterns.
- The findings concluded that isolated papillary muscle hypertrophy can lead to ECG changes, highlighting the need for careful examination of these structures during echocardiography.
Background: The frequency of primary cardiac tumors is rare at about 0.3% by autopsy. Our objective was to investigate the characteristics and locations of cardiac tumors and to provide a prognostic analysis in our hospital.
View Article and Find Full Text PDFBackground: Mitral annular disjunction is a structural abnormality of the mitral annulus fibrosus and is pathologically defined by a separation between the atrial wall-mitral valve junction and the left ventricular attachment. Mitral annular disjunction can cause hypermobility of the mitral valve apparatus and is often associated with mitral valve prolapse (MVP). The aim of this study was to investigate the frequency and characteristics of mitral annular disjunction in the patients referred to an echocardiography laboratory and to compare these with previously reported pathological data.
View Article and Find Full Text PDFAims: To prospectively evaluate the relationship between left atrial volume (LAV) and the risk of clinical events in patients with hypertrophic cardiomyopathy (HCM).
Methods: We enrolled a total of 141 HCM patients with sinus rhythm and normal pump function, and 102 patients (73 men; mean age, 61±13 years) who met inclusion criteria were followed for 30.8±10.
Objectives: Visual assessment of the ejection fraction (EF) is often used in clinical practice, but is subjective and requires training and experience. The auto EF method has been newly developed for automated detection of the left ventricular (LV) endocardial border throughout the cardiac cycle. The clinical feasibility was assessed of the auto EF method for measuring LV volumes and EF in patients.
View Article and Find Full Text PDFBackground: Two-dimensional (D) echocardiography-derived left atrial (LA) volume has been shown to provide a more accurate assessment of LA size than the M-mode LA dimension. Our objective was to provide reference ranges of LA volume in healthy Japanese adults.
Methods And Results: The study subjects consisted of 105 Japanese adults, with a mean age of 39+/-13 years (range 20-63 years old).
Paroxysmal atrial fibrillation (PAF) is a common complication of patients with hypertrophic cardiomyopathy, often leading to acute or progressive heart failure and cerebral infarction. We assessed the echocardiographic data of 141 consecutive patients with hypertrophic cardiomyopathy, with and without PAF. In all, 31 patients (22%) had a history of PAF with spontaneous conversion to in sinus rhythm.
View Article and Find Full Text PDFObjectives: This study evaluated the accuracy of the directional color power Doppler (DCPD) and continuous wave Doppler (CWD) methods incorporated in the new hand-carried SonoSite 180PLUS ultrasound device.
Methods: The hand-held ultrasound system with 2.5 MHz transducer and SONOS 5500 was used as a standard ultrasound system with a 2 to 4 MHz wideband transducer.
We report a case of systolic and diastolic musical murmurs that developed 4 years after DDD pacemaker implantation. Echocardiographic examination disclosed no evidence of serious pacemaker-related complications. Pulsed Doppler examination with a sample volume at the right ventricular portion of a pacemaker lead showed prominent harmonic signals.
View Article and Find Full Text PDFThe clinical assessment of left ventricular systolic function in patients with atrial fibrillation is unreliable and difficult because of beat-to-beat variation. We initially evaluated an index that is on the basis of the ratio of preceding R-R (RR1) to pre-preceding R-R (RR2) intervals (RR1/RR2) for the measurement of Doppler aortic flow (peak flow velocity [Vp] and time-velocity integral [TVI] proportional to stroke volume) in 20 patients (aged 65 +/- 9.6 years) with atrial fibrillation.
View Article and Find Full Text PDFObjectives: Hand-held ultrasound devices are becoming available for clinical examination, but the accuracy and precision of such devices are unclear. This study compared the accuracy of a hand-held echo device to a standard echo system.
Methods: Twenty-two patients were examined with the OptiGo (Phillips Medial Systems) hand-held ultrasound system with a 2.