Key result
Selected 32- or 64-electrode subsets achieve comparable localization error to full 128-electrode arrays.
Why the study?
The optimal number and placement of torso electrodes for an accurate inverse solution to localize cardiac activity remain undetermined.
Does a two-step inverse solution using a reduced subset of significant torso electrodes accurately localize the origin of PVCs compared to using 128 electrodes in patients with PVCs?
Observational (n=13)
No
Does a two-step inverse solution using a reduced subset of significant torso electrodes accurately localize the origin of PVCs compared to using 128 electrodes in patients with PVCs?
Accurate noninvasive localization of premature ventricular contractions can be achieved using a carefully selected reduced number of torso electrodes.
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May simplify PVC localization setups clinically; leaves open validation in larger, diverse cohorts before adoption.
Ondrušová et al. (2023) conducted an observational in Premature ventricular contractions (n=13). Two-step inverse solution using a reduced number of significant electrodes (32 or 64) vs. Inverse solution using all 128 electrodes was evaluated on Average localization error (LE). A two-step inverse solution using a carefully selected subset of 32 or 64 torso electrodes achieved an average localization error of 28.8 to 32.6 mm, comparable to the 28.8 mm error using all 128 electrodes.
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