Persistent atrial standstill in familial Ebstein's anomaly

Area of Science:

• Cardiology
• Genetics
• Congenital Heart Disease

Background:

• Familial Ebstein's anomaly is a rare congenital heart condition.
• Persistent atrial standstill is a severe rhythm disturbance characterized by absent atrial electrical activity.

Observation:

• A father and son with familial Ebstein's anomaly presented with persistent atrial standstill.
• Echocardiography revealed inferior displacement and tethering of tricuspid leaflets in both patients.
• The father experienced a cerebral embolism and myocardial infarction, with necropsy showing leaflet attachment below the membranous septum.

Findings:

• Histological examination revealed fibrofatty infiltration of the right atrial wall, atrioventricular node, and His bundle in the father.
• The son exhibited findings consistent with mild Ebstein's anomaly and persistent atrial standstill, necessitating permanent cardiac pacing.
• The persistent atrial standstill is likely due to atrial wall and His bundle abnormalities, alongside abnormal tricuspid valve attachment.

Implications:

• This case highlights a potential genetic link between Ebstein's anomaly and persistent atrial standstill.
• Understanding these associated abnormalities is crucial for diagnosing and managing familial Ebstein's anomaly.
• Further research into the genetic and structural basis of this combined anomaly is warranted.