Key result
Low-frequency endocardial electrograms map SA node activation sequences and identify the leading pacemaker site.
Why the study?
The morphology of small extracellular potentials localized to the sinoatrial node and their usefulness in evaluating SA node dysfunction were not well characterized.
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May aid experimental SA node mapping in models; leaves open clinical utility for sinus node dysfunction.
Mitsuru Yamamoto (1998) studied Sinoatrial node dysfunction (n=12). Low-frequency extracellular potential recording was evaluated on Morphology of small extracellular potentials localized to the SA node. Low-frequency endocardial extracellular electrograms recorded in and around the SA node reflect two-dimensional activation sequences and can identify the leading pacemaker site.
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