Double-chambered left ventricle - a "heart within a heart"

Area of Science:

• Cardiovascular Pathology
• Forensic Pathology
• Congenital Heart Anomalies

Background:

• Drowning is a leading cause of accidental death, particularly in young, healthy individuals.
• Autopsies are crucial for determining cause of death and identifying underlying pathologies.
• Congenital heart anomalies can present incidentally during post-mortem examinations.

Observation:

• A 20-year-old male, previously healthy, drowned after a recreational activity.
• Autopsy revealed no significant trauma or disease explaining the drowning.
• An unusual incidental finding was a double chambered left ventricle, characterized by a muscular septum dividing the ventricle.

Findings:

• The double chambered left ventricle, or
• heart within a heart
• is a rare congenital cardiac anomaly.
• Histopathological examination confirmed the presence of a muscular septum within the left ventricle.
• No evidence of associated conduction system abnormalities or arrhythmogenic substrates was found.

Implications:

• This case highlights the importance of recognizing rare congenital heart anomalies during forensic autopsies.
• The double chambered left ventricle, despite its striking appearance, is typically hemodynamically insignificant and not a cause of sudden cardiac death.
• Forensic pathologists must differentiate between incidental findings and pathologies directly contributing to mortality.