Day to day and beat to beat variation in normal 3 orthogonal lead electrocardiograms.
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چکیده
منابع مشابه
Day to day and beat to beat variation in normal 3 orthogonal lead electrocardiograms.
Beat to beat and day to day variation in computer calculated electrocardiographic measurements is described on the basis of a study of normal serial 3 orthogonal lead electrocardiograms recorded on 25 patients. The variation of scalar amplitudes and vector orientations was investigated for both the QRS complex and the ST-T segment. The 96 per cent ranges of beat to beat and day to day variation...
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Day - to - Day Variation of the Normal Orthogonal Electrocardiogram
Day-to-day variation of the corrected orthogonial electrocardiogram was investigated in 20 normal subjects. Ten recordings were made in each individual witlh chest electrode positions left unmarked first, after which 10 subjects underwent another series of 10 consecutive daily recordings with marked electrode locations. Mean and maximal day-to-day variations of durations and amplitudes of diffe...
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Serial 3 orthogonal lead electrocardiograms were recorded on 67 patients with acute myocardial infarction. For each series of electrocardiograms, the day to day changes and the changes with respect to the initial computer measurements of selected ST-T segment amplitudes and vector orientations were investigated. The results indicated that the degree of rotation of ST-T vectors, which correspond...
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Whether target organ damage is associated with blood pressure (BP) variability independent of level remains debated. We assessed these associations from 10-minute beat-to-beat, 24-hour ambulatory, and 7-day home BP recordings in 256 untreated subjects referred to a hypertension clinic. BP variability indices were variability independent of the mean, maximum-minimum difference, and average real ...
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ژورنال
عنوان ژورنال: Heart
سال: 1974
ISSN: 1355-6037
DOI: 10.1136/hrt.36.12.1225