Cardiac 123I-MIBG scintigraphy and arrhythmic risk in left ventricular noncompaction

Area of Science:

• Cardiology
• Cardiac Electrophysiology
• Medical Imaging

Background:

• Left ventricular noncompaction (LVNC) is a rare cardiomyopathy with uncertain origins.
• LVNC presents with heart failure, thromboembolism, and life-threatening arrhythmias, often leading to sudden cardiac death.

Observation:

• This case report details a patient with LVNC, normal left ventricular systolic function, and exercise-induced ventricular tachycardia.
• Cardiac sympathetic nervous dysfunction was identified using 123I-metaiodobenzylguanidine (MIBG) myocardial scintigraphy.

Findings:

• This is the first documented instance of cardiac sympathetic nervous dysfunction in a patient with LVNC.
• The observed dysfunction may correlate with the heightened risk of arrhythmias in LVNC.

Implications:

• This finding provides a novel perspective on the pathophysiology of LVNC.
• Understanding sympathetic dysfunction could improve risk stratification and management of LVNC patients.
• Early detection of cardiac autonomic dysfunction may be crucial for preventing adverse events in LVNC.