Evaluation of Right and Left Ventricular Deformation Analysis in İdiopathic Right Bundle Branch Block by Speckle Tracking Echocardiography

Gobut Ö., SEZENÖZ B., Kucukbardasli M., Yamak B. A., ÜNLÜ S.

ECHOCARDIOGRAPHY-A JOURNAL OF CARDIOVASCULAR ULTRASOUND AND ALLIED TECHNIQUES, cilt.42, sa.2, 2025 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 2
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1111/echo.70056
  • Dergi Adı: ECHOCARDIOGRAPHY-A JOURNAL OF CARDIOVASCULAR ULTRASOUND AND ALLIED TECHNIQUES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, CINAHL, EMBASE, MEDLINE
  • Anahtar Kelimeler: branch block, echocardiography, right bundle speckle tracking echocardiography
  • Gazi Üniversitesi Adresli: Evet

Özet

Background Idiopathic right bundle branch block (RBBB) is often seen as harmless and common. However, many studies show it might be linked to negative health outcomes. So, it is crucial to fully understand how RBBB affects the heart's ventricles. Objectives This study aims to examine the right and left ventricular systolic functions in patients with idiopathic RBBB and compare them to those in a healthy control group. Material and Methods Echocardiographic images were obtained from patients with idiopathic RBBB and healthy control participants. Conventional echocardiographic parameters were measured. Two-dimensional (2D) speckle tracking strain analysis was used to assess deformation indices. Results Thirty-nine patients with idiopathic RBBB and 35 healthy participants were included in the study. There were no significant differences in the chamber dimensions of the left ventricle (LV) and right ventricle (RV) between the groups. LV ejection fraction (EF), RV fractional area change (FAC), and tricuspid annular plane systolic excursion (TAPSE) measurements were similar between the groups. LV global longitudinal strain (GLS) (-25.5 +/- 5.7% vs. -22.1 +/- 4.2%, p < 0.05), RV GLS (-26.9 +/- 4.6% vs. -24.0 +/- 4.4%, p < 0.05), and interventricular septum longitudinal strain (IVS LS) (-24.3 +/- 4.9% vs. -19.1 +/- 4.2%, p < 0.05) were significantly reduced in patients with idiopathic RBBB compared to controls, indicating impaired myocardial shortening. Significant differences were also observed in LV (15 [5-30] vs. 30 [20-60], p < 0.05) and RV (18 [7-35] vs. 36 [24-80], p < 0.05) mechanical dispersion, with the differences being more pronounced for the RV between the groups. LV torsion (2.1 +/- 0.6 vs. 1.6 +/- 0.5, p < 0.05) was also worse in patients with idiopathic RBBB. Conclusion Our findings show that idiopathic RBBB significantly affects the longitudinal strain and synchronization of both the LV and RV.