Speckle tracking echocardiography-determined measures of global and regional left ventricular function correlate with

John W Petersen1, Talha F Nazir, Licheng Lee

  • 1Division of Cardiovascular Medicine, University of Florida, Gainesville, Florida, USA. john.petersen@medicine.ufl.edu

Insights

Speckle tracking echocardiography (STE) measures of heart muscle function correlate with patient exercise capacity. These strain measures, particularly longitudinal strain, offer a better assessment of heart failure, especially in preserved ejection fraction cases.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Standard heart function tests often miss left ventricular dysfunction in heart failure patients.
  • These standard measures do not correlate with patient functional capacity.

Purpose of the Study:

  • To assess if speckle tracking echocardiography (STE) measures of myocardial contractility correlate with functional capacity.
  • To evaluate this association in patients with and without preserved ejection fraction.

Main Methods:

  • 68 adult patients' functional status was assessed using the Duke Activity Status Index (DASI).
  • Left ventricular ejection fraction was measured using Simpson's biplane method.
  • QLAB software quantified peak strain measures.

Main Results:

  • Global and regional strain measures (longitudinal, circumferential, radial) showed a strong linear association with DASI scores.
  • Inferolateral segment longitudinal strain had the highest correlation with DASI (r = -0.72).
  • In patients with ejection fraction ≥45%, STE longitudinal strain correlated significantly with DASI, unlike ejection fraction or E/e'.

Conclusions:

  • STE-derived measures of left ventricular function strongly correlate with functional capacity across ejection fraction ranges.
  • STE strain measures, especially longitudinal strain, are valuable for diagnosing left ventricular inadequacy in heart failure, particularly with preserved ejection fraction.
Abstract

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