Cardiac function evaluation in children with spinal muscular atrophy: A case-control study.

Area of Science:

• Pediatric Cardiology
• Neuromuscular Disorders
• Genetics

Background:

• Spinal muscular atrophy (SMA) is a genetic disorder causing motor neuron degeneration and progressive muscle weakness.
• Cardiac function in children with SMA remains understudied.
• Understanding cardiac involvement is crucial for comprehensive SMA management.

Purpose of the Study:

• To evaluate the cardiac function in children diagnosed with spinal muscular atrophy (SMA).
• To identify potential subclinical cardiac abnormalities in pediatric SMA patients.
• To establish baseline cardiac parameters for future intervention studies.

Main Methods:

• Comprehensive cardiac evaluation of 36 SMA patients (types 2 and 3) under 18 years.
• Inclusion of cardiac biomarkers (CK-MB, hs-cTnT), echocardiography, and electrocardiogram.
• Comparison with 40 age/gender-matched healthy controls.

Main Results:

• SMA patients exhibited elevated cardiac biomarkers (CK-MB, hs-cTnT).
• Subclinical ventricular dysfunction was observed, including reduced longitudinal strain and abnormal diastolic filling.
• Elevated heart rate and valve/aortic wall abnormalities were noted in some patients, with no significant correlation to mild scoliosis.

Conclusions:

• Pediatric SMA patients demonstrate subclinical cardiac dysfunction.
• Increased attention to cardiac status in SMA is warranted.
• Further investigation into cardiac interventions for SMA children is necessary.