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2D and 3D assessment of the left ventricle volume and ejection fraction in a general population

Session 3D echocardiography: new clinical implications

Speaker Filip Ericsson

Congress : EuroEcho 2019

  • Topic : imaging
  • Sub-topic : 3D Echocardiography
  • Session type : Moderated Posters
  • FP Number : 1180

Authors : F Ericsson (Aalborg,DK), B Tayal (Aalborg,DK), K Hay Kragholm (Hjorring,DK), T Zaremba (Aalborg,DK), N Holmark Andersen (Aalborg,DK), R Mogelvang (Copenhagen,DK), A Hagendorff (Leipzig,DE), P Soegaard (Aalborg,DK)

Authors:
F Ericsson1 , B Tayal1 , K Hay Kragholm2 , T Zaremba1 , N Holmark Andersen1 , R Mogelvang3 , A Hagendorff4 , P Soegaard1 , 1Aalborg University Hospital, Department of Cardiology - Aalborg - Denmark , 2Vendsyssel Hospital, Department of Cardiology - Hjorring - Denmark , 3Rigshospitalet - Copenhagen University Hospital - Copenhagen - Denmark , 4Leipzig University Hospital, Klinik und Poliklinik für Kardiologie - Leipzig - Germany ,

Citation:

Introduction
In standard practice, LV volumes and EF are estimated by 2D technique. 3D echocardiographic assessment seems more reliable; however, this method has not yet been validated in the general population.

Purpose
To validate 3D echocardiography in a large population sample and investigate differences between 2D and 3D LVEF and volumes

Methods
In The Copenhagen City Heart Study, 4466 echocardiograms were available for analysis. The echocardiograms were obtained during four consecutive heartbeats in both 2D and 3D with GE Vivid E9. Offline analysis was performed on EchoPac v. 201. LVEF was calculated by the modified Simpsons Biplane Auto EF for 2D and by the 4LVQ method for 3D.

Results
The study included 2090 echocardiograms. The mean 2D LVEF was 57.3±6.1% (IQR 54 - 61%) and 51.7±7.9% (IQR 47 - 57%) by 3D.  The mean end-diastolic volume (EDV)  and end-systolic volume (ESV) by  2D and 3D techniques were: EDV 2D 106.1±29.6 ml vs EDV 3D 128.2±32.3 ml , ESV 2D 45.7±15.6 ml vs. ESV 3D 45.7±20.7  , p < 0.05 among all variables.
The average difference of means between 2D and 3D LVEF was 5.6±11.2%, -22.1±56.8 ml for EDV, and -16.9±32.9 ml for ESV.
The correlation coefficient  for LVEF was 0.42, EDV 0.76 and for ESV 0.70.

Conclusion
In our study, we found a significant difference in both LVEF and ventricular volumes when comparing 2D echocardiograms with 3D. 3DE had, in general, lower LVEF, higher EDV and ESV compared to 2D.

Table 1 - Summary of results n = 2090
Variable Min Max Mean IQR (25-75) p-value
LVEF, 2D (%) 18 76 57.3±6.1 54-61 < 0.05
LVEF, 3d (%) 13 77 51.7±7.9 47-57 < 0.05
EDV, 2D (ml) 13 275 106.1±29.6 85-123.8 < 0.05

EDV, 3D (ml)

50 270 128.2±32.3 106-148 < 0.05
ESV, 2D (ml) 15 150 45.7±15.6 35-54 < 0.05
ESV, 3D (ml) 13 185 45.7±20.7 48-74 < 0.05
LVEF: left ventricle ejection fraction, EDV: end-diastolic volume, ESV: end systolic volume, IQR: Inter-quartile range

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