AF	atrial fibrillation
CPET	cardiopulmonary exercise testing
CRT	cardiac resynchronization therapy
CMR	cardiac magnetic resonance
CIED	cardiac implantable electronic device
E/A	ratio of early (E) to late (A) diastolic mitral inflow velocities
E/e′	ratio of early mitral inflow velocity to early mitral annular velocity
ESC	European Society of Cardiology
FCM	ferric carboxymaltose
FDR	false discovery rate
GLS	global longitudinal strain
HF	heart failure
HFrEF	heart failure with reduced ejection fraction
ID	iron deficiency
ICD	implantable cardioverter-defibrillator
IRB	institutional review board
LA	left atrium/atrial
LAD	left atrial diameter
LAEF	left atrial emptying fraction
LAFI	left atrial function index
LAS	left atrial strain
LAVi	left atrial volume index
LV	left ventricle/ventricular
LVEDVi	left ventricular end-diastolic volume index
LVEF	left ventricular ejection fraction
LVMi	left ventricular mass index
LVOT VTI	left ventricular outflow tract velocity time integral
NT-proBNP	N-terminal pro-B-type natriuretic peptide
RA	right atrium/atrial
RAA	right atrial area
RER	respiratory exchange ratio
RV	right ventricle/ventricular
RV FAC	right ventricular fractional area change
RV FWS	right ventricular free wall strain
SD	standard deviation
TAPSE	tricuspid annular plane systolic excursion
TDI	tissue doppler imaging
TSAT	transferrin saturation
TTE	transthoracic echocardiography
VO2	oxygen consumption (often peak VO2 = peak oxygen uptake)