Electrophysiological characteristics related to outcome after catheter ablation of idiopathic ventricular arrhythmia originating from the papillary muscle in the left ventricle

Ji Eun Ban, Hyun Soo Lee, Dae Ln Lee, Hwan Cheol Park, Jae Seok Park, Yasutsugu Nagamoto, Jong Ll Choi, Hong Euy Lim, Sang Weon Park, Young Hoon Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Background and Objectives: The electrophysiological properties associated with favorable outcome of radiofrequency catheter ablation (RFCA) for idiopathic ventricular arrhythmia (VA) originating from the papillary muscle (PM) remain unclear. The purpose of this study was to investigate the relationships of eleetrophysiological characteristics and predictors with the outcome of RFCA in patients with VAs originating from PM in the left ventricle (LV). Subjects and Methods: Twelve (4.2%) of 284 consecutive patients with idiopathic VAs originating from LV PM were assessed. The electrophysiological data were compared between the patients in the successful group and patients in the recurrence group after RFCA. Results: In 12 patients with PM VAs, non-sustained ventricular tachycardias (VTs n=6), sustained VTs (n=4) and premature ventricular complexes n=2 were identified as the presenting arrhythmias. Seven of eight patients showing high-amplitude discrete potentials at the ablation site had a successful outcome (85.7%), while the remaining four patients who showed low-amplitude fractionated potentials at the ablation site experienced VA recurrence. The mean duration from onset to peak downstroke (At) on the unipolar electrogram was significantly longer in the successful group than in the recurrence group (58±8 ms vs. 37±9 ms, p=0.04). A slow downstroke >50 ms of the initial Q wave on the unipolar electrogram at ablation sites was also significantly associated with successful outcome (85.7% vs. 25.0%, p=0.03). Conclusion: In PM VAs, the high-amplitude discrete potentials before QRS and slow downstroke of the initial Q wave on the unipolar electrogram at ablation sites were related to favorable outcome after RFCA.

Original languageEnglish
Pages (from-to)811-818
Number of pages8
JournalKorean Circulation Journal
Volume43
Issue number12
DOIs
Publication statusPublished - 2013 Dec 1

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Catheter Ablation
Papillary Muscles
Heart Ventricles
Cardiac Arrhythmias
Recurrence
Ventricular Premature Complexes
Ventricular Tachycardia

Keywords

  • Arrhythmia
  • Catheter ablation
  • Left ventricle
  • Papillary muscles

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Internal Medicine

Cite this

Electrophysiological characteristics related to outcome after catheter ablation of idiopathic ventricular arrhythmia originating from the papillary muscle in the left ventricle. / Ban, Ji Eun; Lee, Hyun Soo; Lee, Dae Ln; Park, Hwan Cheol; Park, Jae Seok; Nagamoto, Yasutsugu; Choi, Jong Ll; Lim, Hong Euy; Park, Sang Weon; Kim, Young Hoon.

In: Korean Circulation Journal, Vol. 43, No. 12, 01.12.2013, p. 811-818.

Research output: Contribution to journalArticle

Ban, Ji Eun ; Lee, Hyun Soo ; Lee, Dae Ln ; Park, Hwan Cheol ; Park, Jae Seok ; Nagamoto, Yasutsugu ; Choi, Jong Ll ; Lim, Hong Euy ; Park, Sang Weon ; Kim, Young Hoon. / Electrophysiological characteristics related to outcome after catheter ablation of idiopathic ventricular arrhythmia originating from the papillary muscle in the left ventricle. In: Korean Circulation Journal. 2013 ; Vol. 43, No. 12. pp. 811-818.
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abstract = "Background and Objectives: The electrophysiological properties associated with favorable outcome of radiofrequency catheter ablation (RFCA) for idiopathic ventricular arrhythmia (VA) originating from the papillary muscle (PM) remain unclear. The purpose of this study was to investigate the relationships of eleetrophysiological characteristics and predictors with the outcome of RFCA in patients with VAs originating from PM in the left ventricle (LV). Subjects and Methods: Twelve (4.2{\%}) of 284 consecutive patients with idiopathic VAs originating from LV PM were assessed. The electrophysiological data were compared between the patients in the successful group and patients in the recurrence group after RFCA. Results: In 12 patients with PM VAs, non-sustained ventricular tachycardias (VTs n=6), sustained VTs (n=4) and premature ventricular complexes n=2 were identified as the presenting arrhythmias. Seven of eight patients showing high-amplitude discrete potentials at the ablation site had a successful outcome (85.7{\%}), while the remaining four patients who showed low-amplitude fractionated potentials at the ablation site experienced VA recurrence. The mean duration from onset to peak downstroke (At) on the unipolar electrogram was significantly longer in the successful group than in the recurrence group (58±8 ms vs. 37±9 ms, p=0.04). A slow downstroke >50 ms of the initial Q wave on the unipolar electrogram at ablation sites was also significantly associated with successful outcome (85.7{\%} vs. 25.0{\%}, p=0.03). Conclusion: In PM VAs, the high-amplitude discrete potentials before QRS and slow downstroke of the initial Q wave on the unipolar electrogram at ablation sites were related to favorable outcome after RFCA.",
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T1 - Electrophysiological characteristics related to outcome after catheter ablation of idiopathic ventricular arrhythmia originating from the papillary muscle in the left ventricle

AU - Ban, Ji Eun

AU - Lee, Hyun Soo

AU - Lee, Dae Ln

AU - Park, Hwan Cheol

AU - Park, Jae Seok

AU - Nagamoto, Yasutsugu

AU - Choi, Jong Ll

AU - Lim, Hong Euy

AU - Park, Sang Weon

AU - Kim, Young Hoon

PY - 2013/12/1

Y1 - 2013/12/1

N2 - Background and Objectives: The electrophysiological properties associated with favorable outcome of radiofrequency catheter ablation (RFCA) for idiopathic ventricular arrhythmia (VA) originating from the papillary muscle (PM) remain unclear. The purpose of this study was to investigate the relationships of eleetrophysiological characteristics and predictors with the outcome of RFCA in patients with VAs originating from PM in the left ventricle (LV). Subjects and Methods: Twelve (4.2%) of 284 consecutive patients with idiopathic VAs originating from LV PM were assessed. The electrophysiological data were compared between the patients in the successful group and patients in the recurrence group after RFCA. Results: In 12 patients with PM VAs, non-sustained ventricular tachycardias (VTs n=6), sustained VTs (n=4) and premature ventricular complexes n=2 were identified as the presenting arrhythmias. Seven of eight patients showing high-amplitude discrete potentials at the ablation site had a successful outcome (85.7%), while the remaining four patients who showed low-amplitude fractionated potentials at the ablation site experienced VA recurrence. The mean duration from onset to peak downstroke (At) on the unipolar electrogram was significantly longer in the successful group than in the recurrence group (58±8 ms vs. 37±9 ms, p=0.04). A slow downstroke >50 ms of the initial Q wave on the unipolar electrogram at ablation sites was also significantly associated with successful outcome (85.7% vs. 25.0%, p=0.03). Conclusion: In PM VAs, the high-amplitude discrete potentials before QRS and slow downstroke of the initial Q wave on the unipolar electrogram at ablation sites were related to favorable outcome after RFCA.

AB - Background and Objectives: The electrophysiological properties associated with favorable outcome of radiofrequency catheter ablation (RFCA) for idiopathic ventricular arrhythmia (VA) originating from the papillary muscle (PM) remain unclear. The purpose of this study was to investigate the relationships of eleetrophysiological characteristics and predictors with the outcome of RFCA in patients with VAs originating from PM in the left ventricle (LV). Subjects and Methods: Twelve (4.2%) of 284 consecutive patients with idiopathic VAs originating from LV PM were assessed. The electrophysiological data were compared between the patients in the successful group and patients in the recurrence group after RFCA. Results: In 12 patients with PM VAs, non-sustained ventricular tachycardias (VTs n=6), sustained VTs (n=4) and premature ventricular complexes n=2 were identified as the presenting arrhythmias. Seven of eight patients showing high-amplitude discrete potentials at the ablation site had a successful outcome (85.7%), while the remaining four patients who showed low-amplitude fractionated potentials at the ablation site experienced VA recurrence. The mean duration from onset to peak downstroke (At) on the unipolar electrogram was significantly longer in the successful group than in the recurrence group (58±8 ms vs. 37±9 ms, p=0.04). A slow downstroke >50 ms of the initial Q wave on the unipolar electrogram at ablation sites was also significantly associated with successful outcome (85.7% vs. 25.0%, p=0.03). Conclusion: In PM VAs, the high-amplitude discrete potentials before QRS and slow downstroke of the initial Q wave on the unipolar electrogram at ablation sites were related to favorable outcome after RFCA.

KW - Arrhythmia

KW - Catheter ablation

KW - Left ventricle

KW - Papillary muscles

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