PMC8519712_01
Mapped morphologies. Templates of mapped morphologies of premature ventricular contractions (upper panels), intraprocedural burden, and corresponding pacemaps (lower panels), 200 mm/sec.
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fig1
With most PVCs showing a morphology indicating a left ventricular origin (Figure 1), a retrograde left ventricular access via the right femoral artery was established. Even though morphologies 2 and 3 (Figure 1) had a very low burden of 0.57 and 0.58 PVCs per minute, the three-dimensional map was sufficient for correct identification of the PVC origin.
Activation maps. Simultaneously recorded activation maps of polymorphic premature ventricular contractions with corresponding surface ECG and intracardial signals. Partial maps of the left ventricle showing the aortomitral continuity/basal left ventricle, superior view. Color-coded visualization of local activation time (LAT) with the red area indicating the earliest activation. The overlay shows the approximate location of mitral and aortic valve.
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fig2
Figure 2). For morphologies 1 and 2, pacemapping was performed and showed a match of 96% (in 12/12 ECG-leads) for both morphologies in their respective area of earliest activation.