Incidental discovery of sinus venosus atrial septal defect (SV-ASD) in the elderly is rare. This defect allows for lead malpositioning during pacemaker placement and can lead to catastrophic cardioembolic events. Post-pacemaker implantation, chest radiography should be obtained to detect malpositioning early, and if detected, lead adjustment is recommended; if identified later, treatment with an anticoagulant is feasible. SV-ASD repair may be considered as well.
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Published online: February 14, 2023
Accepted: January 13, 2023
Received in revised form: December 31, 2022
Received: May 9, 2022
Publication stageIn Press Corrected Proof
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