Effect of hemodialysis on left ventricular performance

Area of Science:

• Cardiology
• Nephrology
• Medical Imaging

Background:

• Chronic renal failure patients undergoing maintenance hemodialysis (H) can experience changes in left ventricular (LV) function.
• Assessing these changes is crucial for managing patient outcomes.

Purpose of the Study:

• To evaluate the impact of hemodialysis on left ventricular (LV) performance in stable chronic renal failure patients.
• To determine if pre-existing LV function influences the response to hemodialysis.

Main Methods:

• Systolic time intervals (STI) and echocardiograms (Echo) were used to assess LV performance before and after hemodialysis in 19 patients.
• Key indices included % shortening of internal diameter (% delta D), mean velocity of circumferential fiber shortening (VCF), and PEP/LVET ratio.
• Electromechanical systole corrected for heart rate (QS2I) measured adrenergic activity.

Main Results:

• LV function improved in 9 patients (Group I) and decreased in 10 patients (Group II) after hemodialysis.
• Patients with normal baseline LV function (Group I) showed decreased performance post-hemodialysis.
• Patients with abnormal baseline LV function (Group II) demonstrated improved performance post-hemodialysis.

Conclusions:

• Hemodialysis can improve LV function in patients with pre-existing LV dysfunction.
• Hemodialysis may decrease LV performance in patients with normal baseline LV function, potentially due to afterload reduction.
• STI and Echo are valuable, complementary tools for assessing LV function changes during hemodialysis.