Floppy aortic valve presenting as sudden death.

Area of Science:

• Cardiovascular Pathology
• Sudden Cardiac Death Etiology
• Valvular Heart Disease

Background:

• The floppy aortic valve (FAV) is often associated with other cardiovascular abnormalities like Marfan's syndrome.
• Previous cases of FAV have not presented as the sole cause of sudden death.

Observation:

• A previously healthy 34-year-old male presented with sudden, unexpected death during sleep.
• Autopsy revealed a floppy aortic valve (FAV) as the only significant pathological finding.
• Histological, histochemical, and electron microscopy confirmed the diagnosis of FAV.

Findings:

• This case represents the first documented instance of isolated FAV leading to sudden cardiac death.
• No other associated conditions such as floppy mitral valve, Marfan's syndrome, aortic root dilatation, or cystic medial necrosis were present.
• Despite presumed dysrhythmic cause of death, histological examination of the cardiac conduction system showed no anatomical abnormalities.

Implications:

• Isolated FAV should be considered in the differential diagnosis of sudden cardiac death, particularly in younger individuals.
• Further research is needed to elucidate the precise mechanism linking isolated FAV to sudden cardiac death.
• This case underscores the importance of thorough autopsies in identifying rare causes of unexplained mortality.