Current Trends in Cardiology

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Research Article - Current Trends in Cardiology (2021) Volume 5, Issue 7

Correlation between left atrial electromechanical delay and degree of left ventricular diastolic dysfunction in patient with sinus rhythm and preserved systolic function

Background: The Atrial Electromechanical Delay (AEMD) defined as the delay between the onset of electrical activity and the initiation of atrial contraction and measured using Tissue Doppler Imaging (TDI) and Electrocardiogram (ECG).Diastolic dysfunction of Left Ventricle (LV) defined as a condition caused by increased resistance to the filling of LV which may cause symptoms of heart failure. Determining the degree of LV diastolic dysfunction is an important step in echocardiographic laboratory and required the assessment of several parameters according to guidelines of American Society of Echocardiography (ASE) and European Association of Cardiovascular Imaging (EACVI) in 2016. Aim: To investigate the relationship between left atrial electromechanical delay, measured using ECG and TDI and the presence, degree of left ventricular diastolic dysfunction in patients with sinus rhythm and preserved systolic function. Methods: This paper reports a prospective observational study of 30 patients who underwent twodimensional (2D) Transthoracic Echocardiography (TTE) to assess the degree of LV diastolic dysfunction and to measure left atrial electromechanical delay in patient with sinus rhythm and preserved systolic function. AEMD was defined as the time-interval between P-wave on ECG and the beginning of the averaged spectral TDI-derived A’ (septal and lateral sides of the mitral annulus). Results: 30 participants were included in the study. 6 patients had normal diastolic function (Group 1), 8 patients had diastolic dysfunction grade I (group 2), 11 patients had diastolic dysfunction grade II (group 3) and 5 patients had grade III diastolic dysfunction (group 4). The mean value of AEMD for group 1 was 41 milliseconds where the mean AEMD for group 2, 3 and 4 were 53, 74.8 and 98.6 millisecond respectively. Conclusion: Worsening of LV diastolic dysfunction probably associated with prominent prolongation of atrial electromechanical delay. AEMD may predict degree of diastolic dysfunction.

Author(s): Ossama Maadarani*, Hany Alfayed, Zouheir Bita, Rashed Alhamdan, Mohammad Alrashidi

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