AAb/AAbs	autoantibody/autoantibodies
ACE	angiotensin-converting enzyme
ACM	arrhythmogenic cardiomyopathy
AF	atrial fibrillation
AHA/s	anti-heart autoantibody/autoantibodies
AIDA/s	anti-intercalated disk autoantibody/autoantibodies
ALVC	arrhythmogenic left ventricular cardiomyopathy
AMA/s	anti-myosin autoantibody/autoantibodies
APCs	antigen-presenting cells
AT1R	angiotensin II type 1 receptor
AT1R-AAbs	autoantibodies against AT1R
AT2R-AAbs	autoantibodies against angiotensin II type 2 receptor
βAR/βARs	β-adrenergic receptor/s
β1AR	β1-adrenergic receptor
β1AR-AAbs	autoantibodies against β1AR
β2AR	β2-adrenergic receptor
β2AR-AAbs	autoantibodies against β2AR
cAMP	cyclic adenosine monophosphate
CMR	cardiac magnetic resonance
COX-2	cyclooxygenase-2
COVID-19	coronavirus disease 2019
CRT	calreticulin
cTn	cardiac troponin
cTnI	cardiac troponin I
cTnT	cardiac troponin T
DCM	dilated cardiomyopathy
DSC2	desmocollin-2
DSG2	desmoglein-2
DSP	desmoplakin
ELISA	enzyme-linked immunosorbent assay
EMB	endomyocardial biopsy
ER	endoplasmic reticulum
ESC	European Society of Cardiology
ETAR	endothelin-1 type A receptor
ETAR-AAbs	autoantibodies against ETAR
FCM	Fabry cardiomyopathy
GDMT	guideline-directed medical therapy
GPCR/s	G protein-coupled receptor/s
GPCR-AAbs	G protein-coupled receptor autoantibodies
HF	heart failure
HCM	hypertrophic cardiomyopathy
HFrEF	heart failure with reduced ejection fraction
HTx	heart transplantation
IA	immunoadsorption
IDs	intercalated discs
IHD	ischemic heart disease
iNOS	inducible nitric oxide synthase
JUP	plakoglobin
LV	left ventricular
LVAD	left ventricular assist device
LVEF	left ventricular ejection fraction
LVNC	left ventricular non-compaction
MACEs	major adverse cardiac events
MAPK/ERK	mitogen-activated protein kinase/extracellular signal-regulated kinase
MHC	myosin heavy chain
M2R	muscarinic M2 receptor
M2R-AAbs	autoantibodies against M2R
NDLVC	non-dilated left ventricular cardiomyopathy
NT-proBNP	N-terminal pro-B-type natriuretic peptide
NYHA	New York Heart Association
PKA	protein kinase A
PKP2	plakophilin-2
PVCs	premature ventricular contractions
RCM	restrictive cardiomyopathy
SCD	sudden cardiac death
TPE	therapeutic plasma exchange
TTS	Takotsubo syndrome