Resolution of Trifascicular Heart Block with Effective Closure of Congenital Atrial Septal Defect Followed by Later Coronavirus Disease 2019-associated Cardiac Strain.

Heart block (HB) is one of the most serious arrhythmias. Higher degrees of HB-for example, trifascicular HB-result in a more intense patient condition. Atrial septal defects (ASDs) represent the most common congenital heart disease in adults.