title: [Studies on the time domain and power spectrum of high frequency ECG in normal mice].
abstract: The features of time domain and power spectrum of high frequency electrocardiogram (HF-ECG) were studied in normal Kunming mice using a microprocessor ECG system. The results were as follows (mean +/- SD): (1) P-R interval was 34.9 +/- 4.7 ms (n = 58), about one third of the cardiac cycle. (2) The duration and peak-to-peak amplitude of QRS complex were 9.2 +/- 1.2 ms and 1.456 +/- 0.480 mV (n = 74) respectively. (3) The duration and amplitude of T wave were 10.2 +/- 3.2 ms and 0.336 +/- 0.115 mV, respectively (n = 58). (4) Q-T interval was 19.4 +/- 3.2 ms (n = 58), about one fifth of the cardiac cycle. (5) The total number of notches and slurs of leads II of 73 mice were 3 and 26 respectively. (6) The relative power content of each frequency range was: 0-80 Hz: 45.48 +/- 15.32%; 80-200 Hz: 43.97 +/- 9.95%; 200-300 Hz: 8.89 +/- 7.83%; 300-1000 Hz: 1.66 +/- 2.74%; 80-1000 Hz: 54.52 +/- 15.32%.
authors.affiliation: Department of Biology, Shandong Normal University, Jinan.
authors.forename: H B
authors.initials: HB
authors.lastname: Ai
authors.forename: X Y
authors.initials: XY
authors.lastname: Cui
authors.forename: L
authors.initials: L
authors.lastname: Tang
authors.forename: W P
authors.initials: WP
authors.lastname: Zhu
authors.forename: X B
authors.initials: XB
authors.lastname: Ning
authors.forename: X X
authors.initials: XX
authors.lastname: Yang
mesh_terms: D000818:Animals; D004562:Electrocardiography / Q000379:methods / Q000662:veterinary; D005260:Female; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains