Bipolar SEEG waveform projection at ECG candidate times exceeded median timing controls in seven of nine selected adult rest records

We tested whether early bipolar SEEG waveforms at ECG candidate times agree with later rest waveforms. We used nine adult epilepsy rest records from OpenNeuro ds003688, version 1.0.7. Training data alone fixed scales, templates, and the top ten percent of 518 contact pairs. The later projection exceeded the median of 999 timing controls in seven adults. The dimensionless mean excess was 0.021288. The 95 percent adult bootstrap interval was -0.004189 to 0.049255. The two-sided adult sign-flip p value was 0.179688. That test assumes independent adults and symmetric contrast errors under zero. Three adult scores exceeded all their timing controls. The group timing-control rank was 0.006 under the stated shift rule. This rank does not resolve uncertainty between adults. The all-pair mean excess was 0.000171. These results do not establish a positive population mean or a neural source. QRS candidates lack clinical validation. The package preserves code, inputs, source provenance, all planned checks, control scores, waveforms, and reproduction instructions. Direct event checks and the final offline repeat passed. One fresh complete source range reproduced its voltage arrays and archive hash exactly. The local plan is exploratory and is not an external registration.

stereoelectroencephalography · electrocardiography · intracranial EEG · waveform projection · bipolar reference · timing controls