Abstract
Pulmonary hypertension has been associated with right ventricular (RV) dyssynchrony which may induce left ventricular (LV) dysfunction and dyssynchrony through ventricular interdependence. The present study evaluated the influence of RV dyssynchrony on LV performance in patients with pulmonary hypertension. One hundred and seven patients with pulmonary hypertension (age 63 ± 14 years, systolic pulmonary arterial pressure 60 ± 19 mmHg) and LV ejection fraction (EF) >35 % were evaluated. Ventricular dyssynchrony was assessed with speckle tracking echocardiography and defined as the standard deviation of the time to peak longitudinal strain of six segments of the RV (RV-SD) and the LV (LV-SD) in the apical 4-chamber view. Mean RV-SD and LV-SD assessed with longitudinal strain speckle tracking echocardiography were 51 ± 28 and 47 ± 21 ms, respectively. The patient population was divided according to the median RV-SD value of 49 ms. Patients with RV-SD ≥49 ms had significantly worse NYHA functional class (2.7 ± 0.7 vs. 2.3 ± 0.7, p = 0.004), RV function (tricuspid annular plane systolic excursion: 16 ± 4 vs. 19 ± 4 mm, p < 0.001), LVEF (50 ± 10 vs. 55 ± 8 %, p = 0.001), and larger LV-SD (57 ± 18 vs. 36 ± 18 ms, p < 0.001). RV-SD significantly correlated with LV-SD (r = 0.55, p < 0.001) and LVEF (r = −0.23, p = 0.02). Multiple linear regression analysis showed an independent association between RV-SD and LV-SD (β = 0.35, 95 %CI 0.21–0.49, p < 0.001). RV dyssynchrony is significantly associated with LV dyssynchrony and reduced LVEF in patients with pulmonary hypertension.
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Abbreviations
- EF:
-
Ejection fraction
- LV:
-
Left ventricle
- LV-SD:
-
Left ventricular dyssynchrony
- MPAP:
-
Mean pulmonary artery pressure
- NYHA:
-
New York Heart Association
- PH:
-
Pulmonary hypertension
- RV:
-
Right ventricle
- RV-SD:
-
Right ventricular dyssynchrony
- SPAP:
-
Systolic pulmonary artery pressure
- TAPSE:
-
Tricuspid annular plane systolic excursion
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Acknowledgments
The department of Cardiology received research Grants from General Electric Healthcare, Medtronic, Boston Scientific, St. Jude Medical, Biotronik and Actelion Pharmaceuticals. Dr. V. Delgado received consulting fees from St. Jude Medical and Medtronic.
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Haeck, M.L.A., Höke, U., Marsan, N.A. et al. Impact of right ventricular dyssynchrony on left ventricular performance in patients with pulmonary hypertension. Int J Cardiovasc Imaging 30, 713–720 (2014). https://doi.org/10.1007/s10554-014-0384-1
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DOI: https://doi.org/10.1007/s10554-014-0384-1