ACHD	Adult Congenital Heart Disease
ASD	Atrial Septal Defect
AT	Anaerobic Threshold
AVSD	Atrioventricular Septal Defect
BR	Breathing Reserve
ccTGA	Congenitally Corrected Transposition of the Great Arteries
CHD	Congenital Heart Disease
CI	Chronotropic Incompetence
CPET	Cardiopulmonary Exercise Testing
D-TGA	Dextro-Transposition of the Great Arteries
EOV	Exercise Oscillatory Ventilation
ES	Eisenmenger Syndrome
FEV1	Forced Expiratory Volume in one second
FVC	Forced Vital Capacity
HF	Heart Failure
HR	Heart Rate
HRQoL	Health-Related Quality of Life
HRR	Heart Rate Reserve
IPAH	Idiopathic Pulmonary Arterial Hypertension
MACE	Major Adverse Cardiovascular Events
MVV	Maximum Voluntary Ventilation
NYHA	New York Heart Association
PDA	Patent Ductus Arteriosus
PH	Pulmonary Hypertension
RER	Respiratory Exchange Ratio
RV	Right Ventricle
RV-PA	Right Ventricle to Pulmonary Artery
RVOTO	Right Ventricular Outflow Tract Obstruction
SpO2	Peripheral Oxygen Saturation
TGA	Transposition of the Great Arteries
ToF	Tetralogy of Fallot
rToF	repaired ToF—Tetralogy of Fallot
VCO2	Carbon Dioxide Output
VD/VT	Dead Space to Tidal Volume Ratio
VE	Minute Ventilation
VE/VCO2 slope	Ventilation to Carbon Dioxide Output Slope
VE/VO2	Ventilation to Oxygen Uptake Slope
VO2	Oxygen Consumption
VO2 peak/Peak VO2	Peak Oxygen Consumption
VSD	Ventricular Septal Defect