Figure 1:
Left panel: Surface ECG leads I, II and V1. Coronary sinus electrograms
proximal to distal and right ventricular lead electrograms. Digital
calipers denote time from pacing spike to latest activation point
illustrated inn right panel. Right panel: Local activation time map of
the right atrium during pacing from the proximal coronary sinus. The
left atrium geometry is rendered for illustration. SVC denotes superior
vena cava; IVC denotes inferior vena cava. Latest activation time at the
RACT is 86msec.