Intra-Individual Comparison of Sinus and Ectopic Beats Probing the Ventricular Gradient’s Activation Dependence

. 2023 Feb 20;10(2):89. doi: 10.3390/jcdd10020089

AP	action potential
AV	atrioventricular
BBB	bundle branch block
BMI	body mass index
ECG	electrocardiogram
GRI	Glasgow Royal Infirmary
ICD	implantable cardioverter/defibrillator
IV	intraventricular
LEADS	Leiden ECG Analysis and Decomposition Software
LBBB	Left bundle branch block
LUMC	Leiden University Medical left
VCG	vectorcardiogram
VG	ventricular gradient
$\vec{V G_{e}}$	ventricular gradient of the ectopic beat
$\vec{V G_{p}}$	ventricular gradient of the predominant beat
$\vec{Δ V G_{e p}}$	difference vector between the ventricular gradients of the ectopic and the predominant beat