Left ventricular diastolic function in patients on hemodialysis

Area of Science:

• Cardiology
• Nephrology
• Medical Imaging

Background:

• Left ventricular (LV) diastolic dysfunction is common in end-stage renal disease (ESRD) due to chronic uremia and hemodialysis (HD).
• Doppler mitral flow velocity (DMFV) curves can predict prognosis in certain diseases by assessing LV diastolic dysfunction.

Purpose of the Study:

• To investigate if end-stage renal disease factors affect the prognostic value of DMFV curves.
• To determine the relationship between DMFV curve characteristics and outcomes in patients on long-term HD.

Main Methods:

• Retrospective analysis of echo Doppler studies in 90 patients (83 with findings) 10-12 hours post-HD.
• Measured deceleration time (DT) of early mitral filling wave (E) and E/A ratio.
• Compared LV mass, systolic function, pulmonary hypertension, and E/A between long DT (>240 ms) and normal/short DT (<=240 ms) groups.

Main Results:

• Patients with long DT had lower LV mass and pulmonary hypertension compared to normal/short DT.
• No significant difference in LV systolic function or E/A ratio between groups.
• Long DT was associated with a significantly lower adjusted mortality rate (HR 0.44, P=0.02).

Conclusions:

• DMFV curve characteristics, specifically DT, are valuable for predicting outcomes in patients on long-term HD.
• Long DT is linked to better survival in this population.
• These findings highlight the prognostic utility of DMFV assessment in ESRD patients undergoing HD.