Figure 3. Microelectrode recording of EAD‐mediated triggered activity degenerating into VF in SHR hearts .

A, microelectrode (ME) with simultaneous P‐ECG recording 12 and 18 min post‐H₂O₂ exposure illustrates longer lasting triggered activity (^‡) that degenerates to VF. B, another representative SHR heart manifests no EADs at stress‐free baseline. After 22 min of H₂O₂ exposure, DADs (^†) emerge, followed by EAD (*)‐mediated triggered activity (^‡) causing VT, then VF ensues. LA/LV‐Beg, left atrial/left ventricular bipolar electrogram.