Tehran University Medical Journal

Background: Cardiovascular problems including arterial hypertension, coronary artery diseases, congestive heart failure are prevalent among chronic hemodialyzed patients. Ultrafiltration of hemodialyzed patient's serum, which culminating in intravascular volume reduction, is frequently used during hemodialysis. One of the restrictions of the echocardiographic evaluation of the diastolic heart function is the intravascular volume dependency of some echocardiographic parameters. In this study we have evaluated the volume dependency of certain echocardiography parameters in chronically hemodialyzed patients.

Methods: Thirteen patients undergoing chronic hemodialysis in Ghaem Hospital Hemodialysis Center in Mashhad, Iran, were evaluated one hour before and immediately after hemodialysis for the following: all diastolic echocardiographic parameters, left ventricular function, left ventricular systolic function, inferior vena cava (IVC) diameter and IVC collapsibility with inspiration, and systolic and diastolic blood pressure. The echocardiographic parameters were analyzed using the paired Student's t-test.

Results: With hemodialysis, there was no significant change in left ventricular function, A wave amplitude and E/F slope, however, there was a significant reduction of the E wave amplitude, increment in E wave deceleration time (p= 0.001, t=-4.14) and a decrease in the E/A ratio (p=0.03, t=2.46). Tissue Doppler echocardiography showed no significant change in mitral annular diastolic motion, E'/A' waves, with hemodialysis (p=0.728, t= - 0.356), although there was a reduction of the E/E' ratio.

Conclusion: Tissue Doppler imaging and color M-mode echocardiographic parameters are independent of the intravascular value status. With no change associated with hemodialysis, these parameters can be used as reliable criteria for evaluating ventricular diastolic function even when the volume status varies.