Comparing the Performance of Tissue Doppler versus Left Atrial Strain in Predicting Left Ventricular End Diastolic Pressure in Patients with Different Left Ventricular Ejection Fractions

Mahfouz, Aliaa; Salama, Mohammed Kamal; Mohamed, Ramadan Ghalib; Saleh, Mohamed Ayman

doi:10.21608/smj.2018.41318

Comparing the Performance of Tissue Doppler versus Left Atrial Strain in Predicting Left Ventricular End Diastolic Pressure in Patients with Different Left Ventricular Ejection Fractions

Document Type : Original Article

Authors

Department of Cardiovascular Medicine, Aswan University, Aswan, Egypt.

10.21608/smj.2018.41318

Abstract

Background:Early trans-mitral inflow velocity and mitral annular tissue Doppler imaging (E/Em ratio) is widely applied to noninvasively estimate left ventricular (LV) filling pressures. However, E/Em ratio has a significant gray zone among patients with severely impaired ejection fraction. Speckle tracking echocardiography (STE) was recently proposed as an alternative surrogate to estimate LV filling pressures. This study aimed at assessing performance of tissue Doppler parameters and left atrial global longitudinal strain as non-invasive surrogates for LV filling pressures and comparing accuracy of these two parameters across different striae of LVEF.
Methods: A total of 96 patients with sinus rhythm and different ejection fraction who divided into four groups of 24 patients each according to their EF(>55%, 45–54%, 30–44%, and <30%), had an invasive measurement of the LV pressure. Both medial and lateral E/Em ratio were measured in all subjects by 2D Tissue Doppler, peak atrial longitudinal strain (PALS) and Peak atrial contraction strain (PACS) were obtained by averaging all segments measured in the 4-chamber.
Results: Significant Correlation between global PALS and invasive LVEDP in all groups (r = 0.70 P < 0.000), While Lateral E/E’ shows significant correlation only in two groups; preserved and mildly impaired EF (r=0.42 P=0.023, r=0.439 p-0.032; respectively)
Conclusion:In patients with preserved or mildly reduced LV ejection fraction, global PALS and Lateral E/E’ ratio presented good correlations with LVEDP. In patients with moderate or severe reduction of EF, E/E’ ratio correlated poorly with invasively measured LV filling pressures. Global PALS provided an overall better estimation of LV filling pressures.

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