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INTRODUCTION Idiopathic ventricular outflow tract tachycardia or premature ventricular contractions (OT-VTs) can originate from several different sites in the outflow tract, including the left ventricular (LV) endocardium and epicardium. The aims of this study were (1) to develop an ECG algorithm to predict the origin of OT-VT and (2) to test prospectively(More)
INTRODUCTION Elimination of transient pulmonary vein recurrences (dormant PVs) induced by an ATP injection and ablation at the PV carina region is an effective strategy for atrial fibrillation (AF) ablation. The relationship between dormant PVs and the PV carina region has not been evaluated. METHODS A total of 212 consecutive symptomatic AF patients(More)
Quantitative gated single-photon emission computed tomography was performed in 10 patients before and shortly after (<1 month) receiving biventricular pacing (BVP). They were divided into 2 groups (responder and nonresponder groups) on the basis of clinical status and echocardiographic parameters 18 +/- 6 months later. In the responder group, left(More)
BACKGROUND Idiopathic ventricular tachycardias (VTs) and premature ventricular contractions (PVCs) arising from the tricuspid annulus have been reported. OBJECTIVE The purpose of this study was to clarify the prevalence and characteristics of VT/PVCs originating from the tricuspid annulus. METHODS The ECG characteristics and results of radiofrequency(More)
BACKGROUND This study was undertaken to investigate the applicability and image quality of contrast-enhanced visualization of the coronary venous system (CVS) by multidetector row computed tomography (MDCT). METHODS AND RESULTS A total of 70 patients underwent MDCT and for each patient, 6 data sets were created throughout the cardiac cycle. The number and(More)
OBJECTIVES We sought to clarify the prevalence and characteristics of idiopathic ventricular tachycardia or premature ventricular contraction originating from the mitral annulus (MAVT/PVC). BACKGROUND Recent case reports have presented patients with MAVT/PVC. METHODS Electrocardiographic (ECG) characteristics and the results of electrophysiologic(More)
OBJECTIVES We aimed to predict the high-risk plaque of distal embolization after stent deployment in patients with acute ST-segment elevation myocardial infarction (STEMI) with Virtual Histology intravascular ultrasound (VH-IVUS) (Volcano Therapeutics, Inc., Rancho Cordova, California). BACKGROUND Distal embolization during primary percutaneous coronary(More)
BACKGROUND Previous studies have demonstrated similar efficacy of the drug-eluting stent (DES) in patients with and without calcified lesions. However, most of the randomized trials have excluded patients with severe calcified lesions. This study aimed to examine the impact of lesion calcium on clinical and angiographic outcome after sirolimus-eluting stent(More)
BACKGROUND Central sleep apnea, often found in patients with chronic heart failure (CHF), has a high risk of poor prognosis. METHODS AND RESULTS This study involved 20 patients with CHF (left ventricular ejection fraction (LVEF) <45%, M/F =19/1, age 65+/-10 years) and an apnea-hypopnea index (AHI) >5 times/h who were divided into 2 groups: 10 patients(More)
BACKGROUND The concentrations of atrial and brain natriuretic peptides (ANP and BNP) are elevated in patients with atrial fibrillation (AF), but the usefulness of their measurement before and after AF ablation has not been reported. METHODS AND RESULTS The concentrations of the natriuretic peptides were evaluated in 54 patients undergoing catheter(More)