Pathophysiologic Mechanism for Arrhythmias and Impaired Aerobic Capacity in Tetralogy of Fallot and Other Congenital Heart Diseases

Pathophysiologic Mechanism for Arrhythmias and Impaired Aerobic Capacity in Tetralogy of Fallot and Other Congenital Heart Diseases

This study is being done to determine the mechanism(s) contributing to the onset of symptoms (i.e. shortness of breath and/or palpitations) as well as changes in heart structure in patients with congenital heart disease (CHD)

Inclusion Criteria:

• Moderate (or greater) PR based on quantitative Doppler echocardiography.
• Repaired TOF
• Congenital Heart Disease diagnosis including but not limited to Ebstein's anomaly, coarctation of the aorta (COA), Fontan palliation, transposition of the great arteries, congenitally corrected transposition of the great arteries.

Exclusion Criteria:

• Pregnant Women
• Unable to undergo CMRI