β1AR	beta1 adrenergic receptor
β2AR	beta2 adrenergic receptor
ACh	acetylcholine
AChE	acetylcholinesterase
ATP	adenosine triphosphate
AVN	atrioventricular node
BMP	bone morphogenetic protein
CANS	cardiac autonomic nervous system
CCS	cardiac conduction system
CGRP	calcitonin gene related peptide
ChAT	choline acetyltransferase
DBH	dopamine β-hydroxylase
ECG	electrocardiogram
ET-1	endothelin-1
FRET	Förster Resonance Energy Transfer
GATA3	GATA binding protein 3
GDNF	glial cells neurotrophic factors
GFL	Glial cell-line derived neurotrophic factor family of ligands
GP	ganglionated plexi
GPCRs	G-protein coupled receptors
HAND2	heart and neural crest derivative expressed 2
ICA	intrinsic cardiac adrenergic
ICNS	intrinsic cardiac nervous system
IPSCs	induced-pluripotent stem cells
IKBKA	kinase complex-associated protein
LCNs	local circuit neurons
MASH1	mammalian achaete-scute homolog
M2	muscarinic acetylcholine receptors type 2
NCCs	neural crest cells
NE	norepinephrine
NET	norepinephrine reuptake transporter
NGF	nerve growth factor
nNOS	neuronal nitric oxide synthase
NO	nitric oxide
NOS	nitric oxide synthase
NPY	neuropeptide Y
PHOX2A	paired- like homeobox 2a
PHOX2B	paired- like homeobox 2b
PNMT	phenylethanolamine-N-methyltransferase
SAN	sinoatrial node
SAR	sinoatrial ring
SIF	small intensely fluorescent cells
SP	substance P
TH	tyrosine hydroxylase
vAChT	vesicular acetylcholine transporter
VMAT-2	vesicular monoamine transporter 2
VIP	vasoactive intestinal peptide