Is Chiari Network a Benign Structure in Routine Pacemaker Implantation?
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概要
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<B>Background:</B> Chiari network (CN) is the developmental remnants with fine filamentous membrane, and thought to be benign components in electrophysiology. We report a CN patient (pt) with incapable lead manipulation during dual-chamber pacemaker implantation (PMI) and reviewed lead-trouble cases systematically. Case Presentation: A 61-year-old male pt with complete AV block underwent PMI. Anomalous venous drainage was not found and pacemaker leads were inserted into right ventricle (RV) and right atrium (RA) through left axillary vein. The manipulation of both leads was restricted tightly at the tined tips on the postero-inferior RA. Both tips of the leads were entangled with the intra-cavitary structures. Flexing force with deflectable electrophysiology 6Fr-catheter, snare catheter and large-tip (7Fr) ablation catheter did not remove the entangled structures. The myocardial bioptome removed successfully the leads from RA. Histological examination of the entangled tissue at the tined tip of the extirpated RV lead showed normal endomyocardial structures consistent with CN. <B>Discussion and Conclusion:</B> CN had been detected in RA on the preoperative ultrasound echocardiogram (UCG). We have performed 133 pacemaker implantations from January, 2006 to December, 2010 and found RA lead trapping in 3 cases (2.3%). We consider that current complication is not very rare. Careful pre-operative UCG evaluation may provide the further information and awareness on CN-related pacemaker lead trouble.
著者
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Oyama Akiko
Department of Cardiology, Musashino Red Cross Hospital
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Usui Michio
Department Of Cardiology Social Insurance Central General Hospital
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Tashiro Hironori
Department Of Cardiology Social Insurance Central General Hospital
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Noda Makoto
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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Yamamoto Yasuhito
Department Of Biochemistry Tokyo Dental College
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Murakami Tasuku
Department Of Chemistry Faculty Of Education Iwate University
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Watanabe Shingo
Department of Biology and Chemistry, Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa 921-8501, Japan
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Tamura Mieko
Department of Cardiology, Social Insurance Chuo General Hospital
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Noda Makoto
Department of Cardiology, Social Insurance Chuo General Hospital
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Ichikawa Kenichiro
Department of Cardiology, Social Insurance Chuo General Hospital
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Murakami Tasuku
Department of Cardiology, Social Insurance Chuo General Hospital
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