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Familial discrete subaortic stenosis

A A Petsas¹, L C Anastassiades, E C Constantinou

¹Cardiovascular Diagnostic Center, Nicosia, Cyprus.

Clinical Cardiology

|February 25, 1998

Summary

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Discrete subaortic stenosis (DSS), a congenital heart defect, occurred in four family members. This familial clustering suggests a potential autosomal dominant inheritance pattern for this left ventricular outflow tract obstruction.

Area of Science:

Cardiology
Genetics
Pediatric Medicine

Background:

Discrete subaortic stenosis (DSS) is a significant cause of congenital left ventricular outflow tract obstruction, accounting for 8-20% of cases.
While rare, familial occurrences of left ventricular obstructive lesions have been sporadically reported.
Understanding the genetic basis of DSS is crucial for early diagnosis and management.

Observation:

This report details a family with four affected members diagnosed with DSS.
The affected individuals presented with either a fibrous ring or a fibrous membrane, characteristic of DSS.
The family structure included affected siblings and a nephew, indicating potential hereditary transmission.

Findings:

The presence of multiple DSS cases within a single family strongly suggests a genetic link.

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The pattern observed in this family is consistent with an autosomal dominant mode of inheritance.

This finding highlights the importance of family history in diagnosing congenital heart defects.

Implications:

Early genetic screening and counseling may be beneficial for families with a history of DSS.
Further research into the specific genes and mutations responsible for DSS is warranted.
Recognizing the hereditary nature of DSS can improve risk assessment and preventative strategies for affected families.