Left ventricular diastolic function--pulsed Doppler echocardiography versus radionuclide angiography

Area of Science:

• Cardiology
• Diagnostic Imaging
• Physiology

Background:

• Coronary artery disease (CAD) frequently leads to left ventricular (LV) diastolic dysfunction.
• Accurate assessment of LV diastolic function is crucial for managing patients with ischemic heart disease.
• Non-invasive imaging techniques are essential for evaluating diastolic parameters.

Purpose of the Study:

• To evaluate the efficacy of pulsed Doppler (PD) echocardiography in assessing LV diastolic function in patients with CAD.
• To compare the diagnostic performance of PD with radionuclide angiography (RNA).
• To determine the correlation between PD-derived E/A ratio and RNA peak filling rates (PFR).

Main Methods:

• Fifty-five consecutive patients with diagnosed CAD underwent LV diastolic function evaluation.
• Pulsed Doppler measured early (E) and late (A) filling wave velocities of mitral inflow.
• Radionuclide angiography determined LV peak filling rates (PFR).

Main Results:

• LV diastolic dysfunction (E/A ratio < 1.0) was identified in 81.6% of patients with low RNA PFR (≤ 2.3 EDV/sec).
• Normal E/A ratios (> 1.0) were observed in 76.5% of patients with normal RNA PFR (> 2.3 EDV/sec).
• PD and RNA showed agreement in 80% of patients, with a significant correlation (r = 0.51, P < 0.01) between PFR and E/A ratio.

Conclusions:

• Pulsed Doppler echocardiography is a simple and reliable method for identifying LV diastolic dysfunction in patients with ischemic heart disease.
• PD offers a valuable alternative to RNA for assessing diastolic function in this patient population.
• The findings support the routine use of PD in the clinical evaluation of CAD patients.