Table 1.

Sites of earliest activation in terms of the coordinate system Cobiveco⁵¹: a apicobasal; m transmural; r rotational; v transventricular.

Root point	Extent
${\mathbf{x}}_{\text{root}}=\{\text{a},\text{m},\text{r},\text{v}\}$	${\delta }_{\text{m}}$	${\delta }_{\text{rad}}$ (mm)	Fascicle description
$\{0.62,1,0.075,0\}$	0.05	3	Left ventricle mid-posterior superior
$\{0.55,1,0.175,0\}$	0.05	3	Left ventricle mid-posterior inferior
$\{0.85,1,0.57,0\}$	0.05	3	Left ventricle basal anterior paraseptal
$\{0.40,1,0.825,0\}$	0.05	3	Left ventricle mid septal
$\{0.45,1,0.825,1\}$	0.05	3	Right ventricle mid septal
$\{0.80,1,0.44,1\}$	0.05	3	Right ventricle free wall anterior
$\{0.85,1,0.25,1\}$	0.05	3	Right ventricle free wall posterior

${\delta }_{\text{m}}$ and ${\delta }_{\text{rad}}$ are the transmural and radial extent of the activation site, respectively