Seiji Fukamizu

Intermittent ventricular pacing suppression owing to P-wave oversensing with automatic sensitivity adjustment

Takafumi Sasaki, Masao Takahashi, Koichiro Yamaoka, Tomoyuki Arai et autres

Cardiac device sensing has two types: fixed sensitivity and automatic sensitivity. P-wave oversensing (PWOS) is very rare due to the widespread use of fixed sensitivity pacemakers and post-atrial ventricular blanking (PAVB) periods to prevent crosstalk1,2. Azure XT (Medtronic, Minneapolis, MN, USA) employs …

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Wide‐Area Superior Vena Cava Isolation Using a Circular Pulsed Field Ablation Catheter Guided By Spontaneous Conduction Block Lines: A Comparative Study With Radiofrequency Ablation

Tomoyuki Arai, Rintaro Hojo, Yoshiaki Mizunuma, Takafumi Sasaki et autres

AIMS: The superior vena cava (SVC) is a frequent non-pulmonary vein trigger in atrial fibrillation (AF). Adjunctive SVC isolation (SVCi) may reduce AF recurrence; however, radiofrequency (RF) ablation carries risks such as phrenic nerve palsy (PNP) and sinus node dysfunction (SND). Pulsed …

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PO-FPI-314 THE IMPACT OF ACUTE MYOCARDIAL INFARCTION TREATMENT ON SCAR-RELATED VENTRICULAR TACHYCARDIA ABLATION OUTCOMES: TITAN-VT STUDY

Takuro Nishimura, Maiko Kuroda, Yuki Komatsu, Takayuki Kitai et autres

Electrophysiological characteristics of Purkinje potentials and the conduction system in premature ventricular contractions triggering ventricular fibrillation after myocardial infarction

Tatsuya Hayashi, Yuki Komatsu, Shinya Kowase, Seiji Fukamizu et autres

AIMS: Catheter ablation for premature ventricular contractions (PVCs) triggering ventricular fibrillation (VF) after acute myocardial infarction (AMI) has proven effective, with Purkinje potentials often serving as the target. However, the electrophysiological features of Purkinje potentials and their relationship with the conduction system …

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12-lead electrocardiographic morphology of ventricular contractions triggering ventricular fibrillation after acute myocardial infarction: A multicenter analysis

Tatsuya Hayashi, Yuki Komatsu, Shinya Kowase, Seiji Fukamizu et autres

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Vericiguat for patients with heart failure and reduced ejection fraction across the risk spectrum: an individual participant data analysis of the VICTORIA and VICTOR trials

Faı̈ez Zannad, Christopher M. O’Connor, Javed Butler, Ciaran J. McMullan et autres

BACKGROUND: Following completion of the VICTORIA trial, vericiguat was approved for the treatment of worsening heart failure with reduced ejection fraction (HFrEF) and received a class IIb recommendation in European and North American guidelines. The subsequent VICTOR trial evaluated the use of …

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Atrial fibrillation ablation with a bidirectional block of the left atrial band

Takafumi Sasaki, Rintaro Hojo, Koichiro Yamaoka, Hirofumi Kujiraoka et autres

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Long‐Term Follow‐Up of Superior Vena Cava–Right Atrium Spontaneous Conduction Block Line Durability Using the White‐Line Approach of Extended Early Meets‐Late Rate Tools

Yoshiaki Mizunuma, Masao Takahashi, Takafumi Sasaki, Koichiro Yamaoka et autres

Background: Superior vena cava (SVC)-right atrium (RA) spontaneous conduction block occurs in some patients. We demonstrated a novel approach for SVC isolation using visualization of the SVC-RA conduction block line as a white line with the extended early meets-late (EEML) tool of …

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PO-07-046 MULTICENTER ANALYSIS OF ELECTROCARDIOGRAPHIC FEATURES AND PURKINJE POTENTIAL INVOLVEMENT IN PREMATURE VENTRICULAR CONTRACTIONS TRIGGERING VENTRICULAR FIBRILLATION FOLLOWING ACUTE MYOCARDIAL INFARCTION

Tatsuya Hayashi, Yuki Komatsu, Shinya Kowase, Seiji Fukamizu et autres

Predictors of left atrial thrombi for subsequent thromboembolisms: Risk factors derived from echocardiography

Tomoki Horie, Shinsuke Miyazaki, Yasutoshi Nagata, Ryoichi Miyazaki et autres

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Successful ablation of premature ventricular contraction originating from the proximal left anterior fascicle using selective fascicular capture pace mapping with a small-electrode multipolar catheter

Hirofumi Kujiraoka, Masao Takahashi, Takafumi Sasaki, Koichiro Yamaoka et autres

Although there are few reports on the ablation of premature ventricular contractions arising from the left anterior fascicle (LAF-PVCs), several previous studies have identified that the earliest presystolic fascicular potential of the PVC is an effective target for catheter ablation.1–3 However, the …

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Anatomical vs. electrophysiological approach for ablation of premature ventricular contractions originating from the left ventricular summit (ISESHIMA-SUMMIT Study)

Ryuta Watanabe, Koichi Nagashima, Yasuhiro Shirai, Takayuki Kitai et autres

AIMS: Catheter ablation (CA) of idiopathic ventricular arrhythmias (VAs) from the epicardial left ventricular summit is challenging. The endocardial approach targets two sites: the endocardial closest site (ECS) to the epicardial earliest activation site (epi-EAS) and the endocardial earliest activation site (endo-EAS). …

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