“…Although not indicated by the sparse data, the measured PEP may be affected by the AV pacing type analogous to the suggested effect of V pacing 1 . In this case, where the PEP may be prolonged because of the altered course of depolarization, the originally proposed PEP variation parameter (ΔPEP) would be affected because of ΔPEP's direct dependence on absolute PEP values (division by the mean PEP).…”