title: [Evaluation of sinoatrial conduction by the initial potential of the P wave signal-averaged electrocardiogram].
abstract: We investigated whether sinoatrial conduction can be evaluated by the initial potential (IP) on the P wave signal-averaged electrocardiogram (PSAE). We studied 61 patients who underwent electrophysiologic study. Programmed stimulation was performed to obtain the sinoatrial conduction time (SACT) and the maximal sinus node recovery time (SRTmax). The root mean square voltages for the initial 10 and 20 msec of the filtered P waves (IP10 and IP20) were calculated based on PSAE. The association between IP10 and IP20 with SACT or SRTmax was analyzed by linear regression analysis. The reduction of IP10 or IP20 was negatively correlated with the prolongation of SACT, but was not correlated with the prolongation of SRTmax. Our findings showed that IP on the PSAE can be used to estimate the status of sinoatrial conduction.
authors.affiliation: First Department of Medicine, Hyogo College of Medicine.
authors.forename: R
authors.initials: R
authors.lastname: Sasaki
authors.forename: H
authors.initials: H
authors.lastname: Tani
authors.forename: K
authors.initials: K
authors.lastname: Sugisawa
authors.forename: T
authors.initials: T
authors.lastname: Iwasaki
mesh_terms: D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000503:physiopathology; D018780:Body Surface Potential Mapping / Q000379:methods*; D006801:Humans; D012849:Sinoatrial Node / Q000503:physiopathology*