Cardiac output and associated left ventricular hypertrophy in pediatric chronic kidney disease

Area of Science:

• Pediatric Nephrology
• Cardiology
• Clinical Medicine

Background:

• Children with chronic kidney disease (CKD) frequently exhibit eccentric left ventricular hypertrophy (LVH).
• Preload overload is a suspected contributor to LVH in this population.
• The role of increased cardiac output (CO) in pediatric CKD-related LVH requires further investigation.

Purpose of the Study:

• To investigate the hypothesis that elevated CO contributes to increased left ventricular mass index (LVMI) in pediatric CKD patients.
• To identify factors associated with LVMI in children with CKD stages 2-4.

Main Methods:

• Echocardiography was used to assess LV function and geometry at rest and during exercise in 6-20 year olds with CKD.
• Cardiac output (CO), heart rate, and stroke volume were measured.
• Twenty-four-hour ambulatory blood pressure monitoring was conducted.

Main Results:

• 17% of pediatric CKD patients exhibited LVH.
• Patients with LVH showed increased stroke volume and CO compared to those without LVH.
• Multivariate analysis identified CO as the sole independent predictor of increased LVMI (beta = 1.98, p = 0.0005).

Conclusions:

• Elevated cardiac output (CO) may predispose pediatric patients with chronic kidney disease (CKD) to increased left ventricular mass index (LVMI).
• These findings suggest potential adaptations are necessary to address increased metabolic demands in pediatric CKD.
• Further research into hemodynamic adaptations in pediatric CKD is warranted.