Related Experiment Videos
Effect of hemodialysis on left ventricular performance. Analysis of echocardiographic subsets
Insights
Hemodialysis significantly impacts heart function in end-stage renal disease patients, increasing heart rate and contractility while decreasing stroke index. These effects vary based on pre-dialysis heart health and volume status.
Area of Science:
- Cardiology
- Nephrology
- Biomedical Engineering
Background:
- End-stage renal disease (ESRD) necessitates chronic maintenance hemodialysis.
- Hemodialysis can induce significant fluid shifts and electrolyte changes.
- Left ventricular (LV) performance is crucial in ESRD patients, often affected by comorbidities.
Purpose of the Study:
- To evaluate the immediate effects of a 4-hour hemodialysis session on left ventricular performance.
- To identify patient-specific factors influencing LV response to hemodialysis.
Main Methods:
- M-mode echocardiography was performed on 31 ESRD patients before and after hemodialysis.
- Key echocardiographic parameters including heart rate, cardiac index, stroke index, and velocity of circumferential fiber shortening (Vcf) were measured.
Main Results:
- Hemodialysis led to increased mean heart rate and mean Vcf, and decreased mean stroke index.
- Patients with initially reduced mean Vcf showed significant improvement post-hemodialysis.
- Normal Vcf response was observed in patients with normal pre-dialysis LV end-diastolic volume, while increased volume blunted this response.
- Left ventricular hypertrophy appeared to diminish the Vcf increase in some patients.
Conclusions:
- Hemodialysis acutely alters LV performance, with variable responses.
- Pre-dialysis LV volume, wall thickness, and intrinsic contractility are key determinants of LV response to hemodialysis.
- Understanding these determinants can help optimize hemodialysis protocols and manage cardiac complications in ESRD.
Abstract:
To assess the effect of hemodialysis on left ventricular performance, we performed M-mode echocardiography on 31 patients with end-stage renal disease prior to and immediately following 4-hour chronic maintenance hemodialysis. Overall, hemodialysis produced a significant increase in mean heart rate and the mean velocity of circumferential fiber shortening (mean Vcf), a significant decrease in mean stroke index and no significant change in mean cardiac index. Hemodialysis resulted in a significant increase in mean Vcf in the subset of patients with reduced mean Vcf prior to dialysis, but produced no significant change in mean Vcf in the group with normal predialysis mean Vcf. Hemodialysis resulted in a significant increase in mean Vcf in the subset of patients with normal left ventricular end-diastolic volume prior to dialysis, but produced no significant change in mean Vcf in the group with increased predialysis left ventricular end-diastolic volume. The presence of left ventricular hypertrophy appeared to blunt the expected increase in mean Vcf in the group with reduced mean Vcf prior to hemodialysis. These results suggest that predialysis left ventricular volume, wall thickness and contractility are important determinants of the effect of hemodialysis on left ventricular performance.