[Three different types of atrial septal defects in the same family]

Area of Science:

• Cardiology
• Genetics
• Pediatric Medicine

Background:

• Atrial septal defects (ASD) are commonly sporadic, but familial forms usually present with a single ASD type.
• Familial ASDs can be associated with cardiac, osteoarticular, or conduction abnormalities.

Observation:

• A father and his two children presented with atrial septal defects.
• Each family member had a different type of ASD: ostium primum, ostium secundum, and sinus venosus ASD.
• No other congenital malformations were observed in the affected family members.

Findings:

• This is the first reported family exhibiting three distinct types of atrial septal defects.
• The familial transmission of multiple ASD types suggests complex genetic factors influencing ASD development.
• The absence of associated anomalies in this family differentiates it from previously described familial ASD syndromes.

Implications:

• This case expands the understanding of familial atrial septal defect inheritance patterns.
• It suggests that genetic heterogeneity may play a significant role in the diverse presentations of ASD.
• Further research into the genetic underpinnings of familial ASDs is warranted to explore these varied phenotypes.