REPRODUCIBILITY OF THE SIGNAL-AVERAGED ELECTROCARDIOGRAM

被引:30
作者
ENGEL, TR [1 ]
PIERCE, DL [1 ]
PATIL, KD [1 ]
机构
[1] UNIV NEBRASKA,MED CTR,COLL MED,DEPT PREVENT & SOCIETAL MED,OMAHA,NE 68198
关键词
D O I
10.1016/0002-8703(91)90283-N
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Variation in measurements made from signal-averaged electrocardiograms was examined. Averaging 200 beats in 18 normal subjects, pairs of high-frequency QRS and low-amplitude signal durations correlated at immediate, short-term, and long-term intervals. The percent high-frequency (60 Hz to 120 Hz) voltages in the late potential region had modest correlations. However, 95% confidence intervals of differences in paired measurements were as much as 7% for high-frequency QRS, 20% for a low-amplitude signal, and 53% for percent high-frequency, similar at all time intervals. With electrocardiograms averaged to 0.3-mu-V noise, high-frequency QRS and low-amplitude signals prolonged, but variation was similar to that of 200 beat pairs. In contrast, low noise reduced percent high-frequency and lessened variation to 29%. Therefore variation in signal-averaged electrocardiographic measurements was considerable (high-frequency voltage > durations). Noise did not appreciably influence variation in durations but was critical to consistent voltage measurements in the frequency domain.
引用
收藏
页码:1652 / 1660
页数:9
相关论文
共 21 条
  • [1] HIGH-FREQUENCY ELECTROCARDIOGRAPHY - AN EVALUATION OF LEAD PLACEMENT AND MEASUREMENTS
    ATWOOD, JE
    MYERS, J
    FORBES, S
    HALL, P
    FRIIS, R
    MARCONDES, G
    MORTARA, D
    FROELICHER, VF
    [J]. AMERICAN HEART JOURNAL, 1988, 116 (03) : 733 - 739
  • [2] SHORT-TERM AND LONG-TERM REPRODUCIBILITY OF THE SIGNAL-AVERAGED ELECTROCARDIOGRAM IN CORONARY-ARTERY DISEASE
    BORBOLA, J
    DENES, P
    [J]. AMERICAN JOURNAL OF CARDIOLOGY, 1988, 61 (13) : 1123 - 1124
  • [3] BRIGHAM EO, 1974, FAST FOURIER TRANSFO, P76
  • [4] CAIN ME, 1990, CIRCULATION, V82, P354
  • [5] ROLE OF BANDPASS-FILTERS IN OPTIMIZING THE VALUE OF THE SIGNAL-AVERAGED ELECTROCARDIOGRAM AS A PREDICTOR OF THE RESULTS OF PROGRAMMED STIMULATION
    CAREF, EB
    TURITTO, G
    IBRAHIM, BB
    HENKIN, R
    ELSHERIF, N
    [J]. AMERICAN JOURNAL OF CARDIOLOGY, 1989, 64 (01) : 16 - 26
  • [6] REPRODUCIBILITY OF MEASUREMENTS OF VENTRICULAR ACTIVATION TIME USING THE SIGNAL-AVERAGED FRANK VECTORCARDIOGRAM
    DENNISS, AR
    ROSS, DL
    UTHER, JB
    [J]. AMERICAN JOURNAL OF CARDIOLOGY, 1986, 57 (01) : 156 - 160
  • [7] EFFECT OF ANTIARRHYTHMIC THERAPY ON DELAYED POTENTIALS DETECTED BY THE SIGNAL-AVERAGED ELECTROCARDIOGRAM IN PATIENTS WITH VENTRICULAR-TACHYCARDIA AFTER ACUTE MYOCARDIAL-INFARCTION
    DENNISS, AR
    ROSS, DL
    RICHARDS, DA
    CODY, DV
    RUSSELL, PA
    YOUNG, AA
    UTHER, JB
    [J]. AMERICAN JOURNAL OF CARDIOLOGY, 1986, 58 (03) : 261 - 265
  • [8] EASLEY AR, 1990, CLIN PHARMACOL THER, V47, P194
  • [9] GARDNER MJ, 1989, STATISTICS CONFIDENC, P113
  • [10] GAU GT, 1971, MAYO CLIN PROC, V46, P536