TY - JOUR
T1 - PE3-015 Effects of Pacing and High-Pass Filter Settings on Ventricular Bipolar Electrograms in Implantable Cardioverter-Defibrillator Systems
T2 - Implication for Inappropriate Shocks Due to T Wave Oversensing
AU - Maesato, Akira
AU - Higa, Satoshi
AU - Chinen, Ichiro
AU - Ishigaki, Sugako
AU - Lin, Yenn Jiang
AU - Yajima, Machiko
AU - Tatsu, Kazuhito
AU - Obunai, Kotaro
AU - Uechi, Yoichi
AU - Sugama, Moriichi
AU - Masuzaki, Hiroaki
AU - Chen, Shih Ann
PY - 2011
Y1 - 2011
N2 - Introduction: The information about the effects of pacing and high-pass filter settings on ventricular bipolar electrograms in implantable cardioverter-defibrillator (ICD) systems is not available. Methods: 13 consecutive patients (male: 12, age: 48 ± 15 y/o) who underwent ICD (Lexos DR and Lumax 340 DR-T, Biotronik) implantation were included. We measured amplitude of bipolar electrograms from ventricular lead during AAI and DDD mode (120bpm, AV delay: 140ms), and intravenous isoproterenol (ISO) infusion adjusting HR as 120bpm with the nine high-pass filter settings (Hz) (high pass I/II: 40-0.625/5-20, low pass: fixed 40). Results: About the R wave amplitude, DDD mode showed significantly lower compared with AAI and ISO (vs AAI: P<0.001, vs ISOP: P<0.001), Furthermore, there is a significant difference in the effects of high-pass filter settings on R wave amplitude among three phase (P<0.001). DDD mode significantly larger number of patients showing T/R ratio (>0.25) compared with other phase (P<0.001), and smaller number of patients showing T/R ratio (<0.25) compared with other phase (P<0.001) (high-pass I/II: 10/20). Conclusions: These findings have important implication for Inappropriate shocks due to T wave oversensing.
AB - Introduction: The information about the effects of pacing and high-pass filter settings on ventricular bipolar electrograms in implantable cardioverter-defibrillator (ICD) systems is not available. Methods: 13 consecutive patients (male: 12, age: 48 ± 15 y/o) who underwent ICD (Lexos DR and Lumax 340 DR-T, Biotronik) implantation were included. We measured amplitude of bipolar electrograms from ventricular lead during AAI and DDD mode (120bpm, AV delay: 140ms), and intravenous isoproterenol (ISO) infusion adjusting HR as 120bpm with the nine high-pass filter settings (Hz) (high pass I/II: 40-0.625/5-20, low pass: fixed 40). Results: About the R wave amplitude, DDD mode showed significantly lower compared with AAI and ISO (vs AAI: P<0.001, vs ISOP: P<0.001), Furthermore, there is a significant difference in the effects of high-pass filter settings on R wave amplitude among three phase (P<0.001). DDD mode significantly larger number of patients showing T/R ratio (>0.25) compared with other phase (P<0.001), and smaller number of patients showing T/R ratio (<0.25) compared with other phase (P<0.001) (high-pass I/II: 10/20). Conclusions: These findings have important implication for Inappropriate shocks due to T wave oversensing.
KW - cardiac defibrillator
KW - inappropriate shocks
KW - ventricular arrhythmia
UR - http://www.scopus.com/inward/record.url?scp=85008739753&partnerID=8YFLogxK
U2 - 10.4020/jhrs.27.PE3_015
DO - 10.4020/jhrs.27.PE3_015
M3 - Article
AN - SCOPUS:85008739753
SN - 1880-4276
VL - 27
SP - 377
JO - journal of arrhythmia
JF - journal of arrhythmia
ER -