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Peak left atrial strain as a single measure for the non-invasive assessment of left ventricular filling pressures

  • Amita Singh
  • Diego Medvedofsky
  • Anuj Mediratta
  • Bhavna Balaney
  • Eric Kruse
  • Boguslawa Ciszek
  • Atman P. Shah
  • John E. Blair
  • Francesco Maffessanti
  • Karima Addetia
  • Victor Mor-Avi
  • Roberto M. Lang
Original Paper
  • 135 Downloads

Abstract

Echocardiographic assessment of left ventricular (LV) filling pressures is performed using a multi-parametric algorithm. Left atrial (LA) strain was recently found to accurately classify the degree of diastolic dysfunction. We hypothesized that LA strain could be used as a stand-alone marker and sought to identify and test a cutoff, which would accurately detect elevated LV pressures. We studied 76 patients with a spectrum of LV function who underwent same-day echocardiogram and invasive left-heart catheterization. Speckle tracking was used to measure peak LA strain. The protocol involved a retrospective derivation group (N = 26) and an independent prospective validation cohort (N = 50) to derive and then test a peak LA strain cutoff which would identify pre-A-wave LV diastolic pressure > 15 mmHg. The guidelines-based assessment of filling pressures and peak LA strain were compared side-by-side against invasive hemodynamic data. In the derivation cohort, receiver-operating characteristic analysis showed area under curve of 0.76 and a peak LA strain cutoff < 20% was identified as optimal to detect elevated filling pressure. In the validation cohort, peak LA strain demonstrated better agreement with the invasive reference (81%) than the guidelines algorithm (72%). The improvement in classification using LA strain compared to the guidelines was more pronounced in subjects with normal LV function (91% versus 81%). In summary, the use of a peak LA strain to estimate elevated LV filling pressures is more accurate than the current guidelines. Incorporation of LA strain into the non-invasive assessment of LV diastolic function may improve the detection of elevated filling pressures.

Keywords

Left atrium Filling pressure Diastolic function 

Abbreviations

AUC

Area under curve

EDP

End-diastolic pressure

EF

Ejection fraction

LA

Left atrial

LAVi

Left atrial volume index

LV

Left ventricular

NPV

Negative predictive value

PPV

Positive predictive value

ROC

Receiver-operating characteristic

Notes

Acknowledgements

AS was supported by funding from the NIH T32 Training Grant (#5T32HL7381).

Compliance with ethical standards

Conflict of interest

The authors have no relevant financial disclosures or conflicts of interest.

Supplementary material

10554_2018_1425_MOESM1_ESM.mov (2.9 mb)
Video 1. Speckle tracking analysis of left atrial strain. After left atrial boundary is traced manually (left), it is automatically tracked throughout the cardiac cycle, and longitudinal strain is calculated for each consecutive frame in 6 atrial segments. Strain over time is displayed as 6 time curves, color coded the same way as the segmental boundaries to facilitate evaluation of the boundary tracking in each segment (top right). (MOV 2988 KB)

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Amita Singh
    • 1
    • 2
  • Diego Medvedofsky
    • 1
  • Anuj Mediratta
    • 1
    • 3
  • Bhavna Balaney
    • 1
  • Eric Kruse
    • 1
  • Boguslawa Ciszek
    • 1
  • Atman P. Shah
    • 1
  • John E. Blair
    • 1
  • Francesco Maffessanti
    • 4
  • Karima Addetia
    • 1
  • Victor Mor-Avi
    • 1
  • Roberto M. Lang
    • 1
  1. 1.University of Chicago Medical CenterChicagoUSA
  2. 2.University of Wisconsin-MadisonMadisonUSA
  3. 3.North Shore University HospitalManhassetUSA
  4. 4.Università della Svizzera ItalianaLuganoSwitzerland

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