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The absence of high-frequency QRS changes in the presence of standard electrocardiographic QRS changes of old myocardial infarction

Ringborn, Michael LU ; Pahlm, Olle LU ; Wagner, Galen S.; Warren, Stafford G. and Pettersson, Jonas LU (2001) In American Heart Journal 141(4). p.573-579
Abstract
BACKGROUND: This study compares the high-frequency QRS components (HF-QRS) in patients with and without standard electrocardiogram (ECG) changes indicative of old myocardial infarction (MI). Previous studies have indicated that patients with an old MI differ in their HF-QRS compared with healthy subjects. The HF-QRS has been reported to be decreased during acute coronary occlusion and increased after reperfusion. However, there is controversy about the appearance of HF-QRS after the acute phase of MI. METHODS: A total of 154 patients were included, 57 with and 97 without QRS changes of old MI on the standard ECG. The patients with old MI were divided into subgroups on the basis of the MI location indicated by the standard ECG.... (More)
BACKGROUND: This study compares the high-frequency QRS components (HF-QRS) in patients with and without standard electrocardiogram (ECG) changes indicative of old myocardial infarction (MI). Previous studies have indicated that patients with an old MI differ in their HF-QRS compared with healthy subjects. The HF-QRS has been reported to be decreased during acute coronary occlusion and increased after reperfusion. However, there is controversy about the appearance of HF-QRS after the acute phase of MI. METHODS: A total of 154 patients were included, 57 with and 97 without QRS changes of old MI on the standard ECG. The patients with old MI were divided into subgroups on the basis of the MI location indicated by the standard ECG. Signal-averaged ECGs from the 12 standard leads were recorded. The root-mean-square values of the HF-QRS were determined within two frequency bands: 150 to 250 Hz and 80 to 300 Hz. RESULTS: There was a large interindividual variation in HF-QRS in patients without MI as well as in those with different MI locations. There were no significant differences between the groups in the summed HF-QRS of all 12 leads or in the pattern of lead distribution of the HF-QRS. Not even the patients with the greatest QRS changes of old MI could be differentiated from those without any changes of old MI on the standard ECG. The results were the same in both analyzed frequency bands. CONCLUSIONS: This study shows, contrary to previous studies, that analysis of HF-QRS cannot differentiate between patients with and without old MI. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
American Heart Journal
volume
141
issue
4
pages
573 - 579
publisher
Mosby
external identifiers
  • pmid:11275922
  • scopus:0035091584
ISSN
1097-6744
DOI
10.1067/mhj.2001.113390
language
English
LU publication?
yes
id
de2e1393-039e-4713-ba9d-fca826728d4d (old id 1121401)
date added to LUP
2008-07-11 14:02:24
date last changed
2018-01-07 05:58:15
@article{de2e1393-039e-4713-ba9d-fca826728d4d,
  abstract     = {BACKGROUND: This study compares the high-frequency QRS components (HF-QRS) in patients with and without standard electrocardiogram (ECG) changes indicative of old myocardial infarction (MI). Previous studies have indicated that patients with an old MI differ in their HF-QRS compared with healthy subjects. The HF-QRS has been reported to be decreased during acute coronary occlusion and increased after reperfusion. However, there is controversy about the appearance of HF-QRS after the acute phase of MI. METHODS: A total of 154 patients were included, 57 with and 97 without QRS changes of old MI on the standard ECG. The patients with old MI were divided into subgroups on the basis of the MI location indicated by the standard ECG. Signal-averaged ECGs from the 12 standard leads were recorded. The root-mean-square values of the HF-QRS were determined within two frequency bands: 150 to 250 Hz and 80 to 300 Hz. RESULTS: There was a large interindividual variation in HF-QRS in patients without MI as well as in those with different MI locations. There were no significant differences between the groups in the summed HF-QRS of all 12 leads or in the pattern of lead distribution of the HF-QRS. Not even the patients with the greatest QRS changes of old MI could be differentiated from those without any changes of old MI on the standard ECG. The results were the same in both analyzed frequency bands. CONCLUSIONS: This study shows, contrary to previous studies, that analysis of HF-QRS cannot differentiate between patients with and without old MI.},
  author       = {Ringborn, Michael and Pahlm, Olle and Wagner, Galen S. and Warren, Stafford G. and Pettersson, Jonas},
  issn         = {1097-6744},
  language     = {eng},
  number       = {4},
  pages        = {573--579},
  publisher    = {Mosby},
  series       = {American Heart Journal},
  title        = {The absence of high-frequency QRS changes in the presence of standard electrocardiographic QRS changes of old myocardial infarction},
  url          = {http://dx.doi.org/10.1067/mhj.2001.113390},
  volume       = {141},
  year         = {2001},
}