Multiple macroreentrant ventricular tachycardias exhibiting centrifugal endocardial activations from the scar border zone after myocardial infarction.
A 53-year-old man with a ventricular tachycardia (VT) electrical storm during the chronic phase of an extensive anteroseptal myocardial infarction underwent electrophysiologic testing and catheter ablation. An electroanatomical map during 7 induced macroreentrant VTs demonstrated multiple centrifugal endocardial activations from sites that were located at the circumferential border zone of a large scar area. Interestingly, during the radiofrequency catheter ablation of 4 of the VTs, the elimination of the substrate of the previous VTs converted one VT to another probably because those VTs might have shared a central common pathway of the macroreentrant circuit with different exits.
Yamada
Takumi
T
Division of Cardiovascular Diseases, University of Alabama at Birmingham, Birmingham, AL 35294-0019, USA. takumi-y@fb4.so-net.ne.jp
Murakami
Yoshimasa
Y
Muto
Masahiro
M
Yoshida
Naoki
N
Kay
G Neal
GN
D002921:Cicatrix / Q000175:diagnosis / Q000209:etiology*; D004562:Electrocardiography; D004699:Endocardium; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications* / Q000175:diagnosis / Q000601:surgery*; D013611:Tachycardia, Atrioventricular Nodal Reentry / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery*; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery*