TY - JOUR
T1 - Human histopathology of substrate based linear radiofrequency catheter ablation to electrical storm in old inferior myocardial infarction
AU - Yamashina, Yoshihiro
AU - Yagi, Tetsuo
AU - Namekawa, Akio
AU - Ishida, Akihiko
AU - Sato, Hirokazu
AU - Nakagawa, Takashi
AU - Sakuramoto, Manjirou
AU - Naganuma, Hiroshi
AU - Yambe, Tomoyuki
PY - 2009/3/1
Y1 - 2009/3/1
N2 - 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.
AB - 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.
KW - Catheter ablation
KW - Electro-anatomical mapping
KW - Human histopathology
KW - Ventricular tachycardia
UR - http://www.scopus.com/inward/record.url?scp=59649090903&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=59649090903&partnerID=8YFLogxK
U2 - 10.1007/s10840-008-9313-3
DO - 10.1007/s10840-008-9313-3
M3 - Article
C2 - 18839294
AN - SCOPUS:59649090903
VL - 24
SP - 139
EP - 142
JO - Journal of Interventional Cardiac Electrophysiology
JF - Journal of Interventional Cardiac Electrophysiology
SN - 1383-875X
IS - 2
ER -