Inappropriate left ventricular mass in children and young adults with chronic renal insufficiency

Area of Science:

• Pediatric Nephrology
• Cardiology
• Cardiovascular Adaptation

Background:

• Children with chronic renal insufficiency (CRI) may develop increased left ventricular mass (LVM) as an adaptive response to increased cardiac workload.
• It is hypothesized that pre-dialysis LVM in these children exceeds compensatory levels for their individual cardiac load.

Purpose of the Study:

• To investigate whether pre-dialysis left ventricular mass (LVM) values in children with chronic renal insufficiency (CRI) exceed compensatory values for individual cardiac load.
• To assess cardiac structure and systolic performance in children with CRI compared to healthy controls.

Main Methods:

• Echocardiographic assessment of LV dimensions, wall thicknesses, and volumes in 33 pre-dialysis children with CRI and 33 age/gender-matched controls.
• Analysis of endocardial and midwall shortening, ejection fraction, LVM, LVM index, relative wall thickness, circumferential wall stress, and excess LVM.
• Comparison of anthropometric, biochemical, and echocardiographic parameters between CRI patients and controls.

Main Results:

• Children with CRI demonstrated higher LVM index values and a greater prevalence of left ventricular hypertrophy (36.3% vs 9%).
• The ratio of excess LVM was significantly higher in CRI patients (126% +/- 19%) compared to controls (103% +/- 13%).
• Patients with CRI exhibited lower LV ejection fraction, midwall fractional shortening, and stress-corrected midwall shortening.

Conclusions:

• In children with CRI, LVM values are elevated beyond what is required to sustain individual cardiac load.
• This condition is associated with left ventricular hypertrophy and impaired systolic performance in pre-dialysis pediatric patients.
• Findings suggest that CRI significantly impacts cardiac remodeling and function even before the initiation of dialysis.