| pubmed-article:3687780 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C2349001 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0035647 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0681850 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C1706203 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C2697811 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0013798 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C1274040 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C1280500 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C1710082 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0205148 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0205390 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C1550501 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0936012 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0282183 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0456962 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C0205087 | lld:lifeskim |
| pubmed-article:3687780 | lifeskim:mentions | umls-concept:C2926735 | lld:lifeskim |
| pubmed-article:3687780 | pubmed:issue | 16 | lld:pubmed |
| pubmed-article:3687780 | pubmed:dateCreated | 1988-1-20 | lld:pubmed |
| pubmed-article:3687780 | pubmed:abstractText | A microcomputer-based system capable of performing time- and frequency-domain analysis on the same set of acquired and signal-averaged raw data was used to correlate late potentials detected in the time domain with the results of frequency-domain analysis. Ten patients with spontaneous or inducible sustained ventricular tachycardia (VT) known to have abnormal late potentials in the time-domain signal-averaged electrocardiogram and 10 normal subjects without late potentials were studied. Fast Fourier transform analysis was performed on a segment that comprised the last 40 ms of the QRS and the ST segment up to the onset of the T wave as identified visually. The high-frequency signal content, expressed as the area ratio or the peak magnitude, was found to be markedly dependent on the length of the analyzed QRS-ST segment. A change of as little as 3 ms in the duration of the estimated QRS-ST segment changed the results of the frequency analysis across proposed boundaries of normalcy in normal subjects and in patients with VT. This resulted in both false-negative and false-positive conclusions. Similar results were obtained when the effects of varying analyzed signal length or phase were studied using a pure synthesized sine wave signal. For frequency analysis to be clinically useful and reproducible, standards of normalcy must be established for a signal region of fixed duration or the technique must be modified so as to be insensitive to duration of signal sample. | lld:pubmed |
| pubmed-article:3687780 | pubmed:grant | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:3687780 | pubmed:language | eng | lld:pubmed |
| pubmed-article:3687780 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:3687780 | pubmed:citationSubset | AIM | lld:pubmed |
| pubmed-article:3687780 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:3687780 | pubmed:month | Dec | lld:pubmed |
| pubmed-article:3687780 | pubmed:issn | 0002-9149 | lld:pubmed |
| pubmed-article:3687780 | pubmed:author | pubmed-author:el-SherifNN | lld:pubmed |
| pubmed-article:3687780 | pubmed:author | pubmed-author:FontaineJ MJM | lld:pubmed |
| pubmed-article:3687780 | pubmed:author | pubmed-author:HenkinRR | lld:pubmed |
| pubmed-article:3687780 | pubmed:author | pubmed-author:KelenG JGJ | lld:pubmed |
| pubmed-article:3687780 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:3687780 | pubmed:day | 1 | lld:pubmed |
| pubmed-article:3687780 | pubmed:volume | 60 | lld:pubmed |
| pubmed-article:3687780 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:3687780 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:3687780 | pubmed:pagination | 1282-9 | lld:pubmed |
| pubmed-article:3687780 | pubmed:dateRevised | 2007-11-14 | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:meshHeading | pubmed-meshheading:3687780-... | lld:pubmed |
| pubmed-article:3687780 | pubmed:year | 1987 | lld:pubmed |
| pubmed-article:3687780 | pubmed:articleTitle | Effects of analyzed signal duration and phase on the results of fast fourier transform analysis of the surface electrocardiogram in subjects with and without late potentials. | lld:pubmed |
| pubmed-article:3687780 | pubmed:affiliation | Veterans Administration Medical Center, Brooklyn, New York. | lld:pubmed |
| pubmed-article:3687780 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:3687780 | pubmed:publicationType | Comparative Study | lld:pubmed |
| pubmed-article:3687780 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
| pubmed-article:3687780 | pubmed:publicationType | Research Support, U.S. Gov't, Non-P.H.S. | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:3687780 | lld:pubmed |
