Prognostic value of echocardiography in children with idiopathic dilated cardiomyopathy

Area of Science:

• Pediatric Cardiology
• Cardiovascular Research
• Medical Imaging

Background:

• Idiopathic dilated cardiomyopathy (IDC) presents a significant mortality risk in pediatric patients, particularly within the initial years of diagnosis.
• Early prediction of outcomes is crucial for timely intervention in children with IDC.

Purpose of the Study:

• To evaluate the predictive value of echocardiographic indexes, including left ventricular shortening fraction (LVSF), end-diastolic dimension, and wall mass, for survival in pediatric IDC patients.
• To determine if changes in these indexes over time correlate with patient outcomes.

Main Methods:

• Retrospective review of echocardiograms from 72 infants and children diagnosed with IDC.
• Comparison of initial and follow-up echocardiographic measurements (LVSF, end-diastolic dimension, wall mass) between survivors and non-survivors (or those requiring heart transplant).
• Actuarial survival analysis was performed.

Main Results:

• Initial echocardiographic indexes at the first examination did not predict patient survival.
• A significant improvement in LVSF was observed at 1- to 6-month follow-up in surviving patients, while LVSF remained unchanged in those who died or needed transplantation.
• Persistent LVSF below 15% at follow-up was associated with significantly lower 1- and 5-year survival rates compared to patients with LVSF above 15%.

Conclusions:

• Follow-up LVSF, assessed at least one month after initial examination, is a valuable predictor of survival in pediatric IDC.
• This metric can aid in identifying pediatric patients who may benefit from early cardiac transplantation.