Document Detail

Human histopathology of substrate based linear radiofrequency catheter ablation to electrical storm in old inferior myocardial infarction.
MedLine Citation:
PMID:  18839294     Owner:  NLM     Status:  MEDLINE    
A 62-year-old-male with old inferior myocardial infarction suffered from drug resistant electrical storms and frequent shocks from an implantable cardioverter defibrillator. Emergent radiofrequency catheter ablation was performed. The patient underwent substrate mapping that uses an electro-anatomical mapping system during sinus rhythm because of multiple QRS morphologies and hemodynamic instability during ventricle tachycardia. The electro-anatomical map revealed a massive low voltage zone (<0.4 mV on amplitude of bipolar voltages) in the inferior wall of the left ventricle. Several ablation lines were placed (1) around the low voltage zone and (2) traversing the low voltage zone. After the ablation, electrical storms were well suppressed. Three weeks later he died due to pneumonia. Postmortal evaluation specified sites in the low voltage zone on invital electro-anatomical mapping were well correlated to histopathological dense scar. The ablation produced coagulation necrosis up to a maximum depth of 4.2 mm.
Yoshihiro Yamashina; Tetsuo Yagi; Akio Namekawa; Akihiko Ishida; Hirokazu Sato; Takashi Nakagawa; Manjirou Sakuramoto; Hiroshi Naganuma; Tomoyuki Yambe
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Publication Detail:
Type:  Case Reports; Journal Article     Date:  2008-10-07
Journal Detail:
Title:  Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing     Volume:  24     ISSN:  1572-8595     ISO Abbreviation:  J Interv Card Electrophysiol     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-02-09     Completed Date:  2009-06-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9708966     Medline TA:  J Interv Card Electrophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  139-42     Citation Subset:  IM    
Division of Cardiology, Sendai City Hospital, Wakabayashi-ku, Shimizukouji3-1, Sendai, Miyagi, Japan.
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MeSH Terms
Catheter Ablation / adverse effects*
Cicatrix / etiology*,  pathology*
Heart Conduction System / pathology*,  surgery*
Middle Aged
Myocardial Infarction / complications,  pathology*,  surgery*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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