AP	action potentials
APD	AP duration
ARDA	Atrial selective therapeutic agents
ChTx	Charybdotoxin
CMs	cardiomyocytes
EADs	probability of early afterdepolarizations
ERG	ether-á-go-go gene
ERP	effective refractory period
GOF	gain of function
hiAM	human immortalized atrial myocyte
iAM	immortalized atrial myocyte
IK,ACh	acetylcholine-sensitive inward rectifier potassium current
IKr	rapidly activating
IKs	slowly activating
IKur	ultra-rapidly activating
IL	Interleukin
Ito1	the “transient outward” potassium current
Kv	voltage-gated potassium channels
KTx	potassium channel toxins
LOF	loss of function
MgTx	Margatoxin
PAH	pulmonary arterial hypertension
ProTx2	Protoxin II
SPPS	solid-phase peptide synthesis
SR	sinus rhythm
TTX	tetrodotoxin
VGICs	Voltage-gated ion channels
Vmax	maximum speed of depolarization
VSD	voltage-sensing domain
VSP	voltage-sensing phosphatase