Prolonged QRS duration as a predictor of right ventricular dysfunction after balloon pulmonary angioplasty

Ryotaro Asano, Takeshi Ogo, Keiko Ohta-Ogo, Shigefumi Fukui, Akihiro Tsuji, Jin Ueda, Nao Konagai, Tetsuya Fukuda, Yoshiaki Morita, Teruo Noguchi, Kengo Kusano, Toshihisa Anzai, Hatsue Ishibashi-Ueda, Satoshi Yasuda

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Background: Balloon pulmonary angioplasty (BPA) has shown beneficial effects for chronic thromboembolic pulmonary hypertension (CTEPH). However, previous studies have shown less cardiac output improvement and symptoms remaining after BPA, implying poor right ventricular (RV) function recovery. Therefore, we investigated the residual RV dysfunction after BPA to reveal risk factors, clinical effects, and possible underlying histopathological mechanisms. Methods and results: We investigated 61 consecutive CTEPH patients who underwent cardiovascular magnetic resonance before and 3 and 12 months after BPA series. Residual dysfunction (RD) of RV was defined as RV end-diastolic volume index >100 ml/m 2 or RV ejection fraction (EF) <45% at 12-month follow-up. Patients were divided into RD (44%) and normalized dysfunction (ND) (56%) groups. Compared with the ND group, the RD group had significantly worse World Health Organization (WHO) functional class at follow-up. No significant hemodynamic differences were observed between the groups. On multivariable logistic regression analysis, male sex (odds ratio [OR] 12.5, p = 0.004) and prolonged QRS duration (OR 1.08, p = 0.029) were independently associated with residual RV dysfunction. Additionally, RV histopathology in 11 CTEPH autopsy cases showed that QRS duration was correlated with RV fibrosis area. Conclusions: Relatively high percentage (44%) of residual RV dysfunction with worse WHO functional class was observed in CTEPH patients even after BPA. Prolonged QRS duration may predict poor recovery in RV function after BPA.

Original languageEnglish
Pages (from-to)176-181
Number of pages6
JournalInternational Journal of Cardiology
Publication statusPublished - 01-04-2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine


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