Electrocardiographic characteristics for predicting idiopathic right ventricular outflow tract premature ventricular complex-induced cardiomyopathy

Shinya Yamada, Fa Po Chung, Yenn Jiang Lin, Shih Lin Chang, Li Wei Lo, Yu Feng Hu, Tze Fan Chao, Jo Nan Liao, Chung Hsing Lin, Chin Yu Lin, Yao Ting Chang, Abigail Louise D. Te, Ying Chieh Liao, Po Ching Chi, Shih Ann Chen

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Purpose: In spite of several proposed predictors for premature ventricular complex (PVC)-induced cardiomyopathy (PVC-CMP), the specific ECG features of idiopathic right ventricular outflow tract (RVOT) PVC-CMP remain unknown. Methods: A total of 130 patients (49 males, mean age 44 years) with symptomatic and drug-refractory idiopathic RVOT PVCs undergoing radiofrequency catheter ablation (RFCA) were enrolled. The patients were categorized into two groups, including those with and without RVOT PVC-CMP (left ventricular ejection fraction (LVEF) < 50%, n = 25 and LVEF ≥ 50%, n = 105, respectively). The 12-lead PVC morphologies were assessed. Results: Patients with RVOT PVC-CMP had a lower LVEF (42 ± 5% vs. 60 ± 7%, P < 0.01) and higher PVC burden (24 ± 14% vs. 15 ± 11%, P = 0.02) when compared to patients without RVOT PVC-CMP. The PVC features in those with PVC-CMP displayed a significantly wider QRS duration (143 ± 14 ms vs. 132 ± 17 ms, P < 0.01) and higher peak deflection index (PDI; 0.60 ± 0.07 vs. 0.55 ± 0.08, P < 0.01). A multivariate analysis demonstrated that the QRS duration (odds ratio (OR) 1.130, 95% confidence interval (CI) 1.020–1.253, P = 0.02) and PDI (OR 1.240, 95% CI 1.004–1.532, P = 0.04) were independently associated with RVOT PVC-CMP. Based on the receiver-operating characteristic analysis, a QRS duration > 139 ms and PDI > 0.57 could predict RVOT PVC-CMP (area under the curve (AUC) 0.710 and AUC 0.690, respectively). The elimination and suppression of PVCs by RFCA resulted in the recovery of the LVEF in RVOT PVC-CMP. Conclusions: The ECG parameters, including a wider QRS duration and higher PDI, could predict the development of RVOT PVC-CMP, which could be effectively treated by RFCA.

Original languageEnglish
Pages (from-to)175-185
Number of pages11
JournalJournal of Interventional Cardiac Electrophysiology
Volume53
Issue number2
DOIs
Publication statusPublished - Nov 1 2018

Keywords

  • Catheter ablation
  • Electrocardiography
  • Premature ventricular complex-induced cardiomyopathy
  • Ventricular arrhythmia

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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