The ratio of main pulmonary artery to ascending aorta diameter is associated with the right ventricular outflow tract ve
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The ratio of main pulmonary artery to ascending aorta diameter is associated with the right ventricular outflow tract ventricular arrhythmias Ruikun Jia 1 & Ying Xu 1 & Yichun Luo 2 & Chao Yang 1 & Song Zou 1 & Shenzhen Gong 1 & Ciren Yangzong 1 & Ran Guo 1 & Guobin Liu 3 & Kaijun Cui 1 Received: 14 July 2020 / Accepted: 10 September 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Background Although outflow tract (OT) ventricular arrhythmias (VAs) are generally regarded as benign, the relationship between circulation pressure and VAs has received considerable attention in recent years. Previous studies have shown that the ratio of main pulmonary artery (MPA) to ascending aorta (AA) diameter is associated with pulmonary pressure. Here, we investigated whether an elevated MPA/AA ratio is associated with right ventricular OT (RVOT) VAs. Methods A total of 67 patients with OT VAs (47 patients with RVOT and 20 patients with LVOT) who underwent cardiac multidetector computed tomography and radiofrequency ablation were enrolled in this study. MPA and AA diameters were measured at the level of the bifurcation of the pulmonary artery. According to the MPA/AA ratio, patients were further divided into two groups: the MPA/AA ratio abnormal group (n = 19), which is defined as MPA/AA ratio ≥ 0.9, and the MPA/AA ratio normal group (n = 48) consisting of patients with an MPA/AA ratio < 0.9. Results Patients with RVOT VAs exhibited an elevated MPA/AA ratio (0.84 ± 0.11 vs. 0.75 ± 0.11, p = 0.006). Furthermore, this MPA/AA ratio was shown to be an independent predictor for RVOT VAs (p = 0.013, 95% confidence interval: 1.016–1.145), with an abnormal MPA/AA ratio increasing the odds of RVOT VAs 5.1-fold in patients with OT VAs. Conclusion Patients with RVOT VAs exhibited significantly higher MPA/AA ratios compared with those LVOT VAs. The MPA/AA ratio was showed to be an independent predictor RVOT VAs. Keywords Right outflow tract ventricular arrhythmias . Radiofrequency ablation . Main pulmonary artery . Main pulmonary artery/ascending aorta ratio
1 Introduction Idiopathic outflow tract (OT) ventricular arrhythmias (VAs) are the most common form of VAs, which are effectively
Ruikun Jia and Ying Xu contributed equally to this work. * Guobin Liu [email protected] * Kaijun Cui [email protected] 1
Department of Cardiovascular Medicine, West China Hospital, Sichuan University, Chengdu 610041, People’s Republic of China
2
Department of Radiology, West China Hospital, Sichuan University, Chengdu 610000, People’s Republic of China
3
Department of Cardiovascular Medicine, The First People’s Hospital of Jintang County, Chengdu 610041, People’s Republic of China
treated with radiofrequency ablation (RFA). During routine examinations, OT VAs are only considered in patients with other clinically defined abnormalities, including electrocardiogram, echocardiogram, and coronary angiography [2]. Furthermore, previous cardiac magnetic resonance imaging examinations revealed no significant difference in
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