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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
|
| pubmed:dateCreated |
1985-8-2
|
| pubmed:abstractText |
We performed a prospective study of the high-frequency components of the terminal portion of the QRS complex in 50 patients with acute myocardial infarction (AMI) (mean age 63 +/- 10 years) within 3.25 +/- 2.45 days of the acute event. Signal averaging (400 beats) at a filter setting of 80 to 300 Hz was performed and the duration of the low-amplitude signals of less than 40 microV in the terminal portion of the QRS, the root-mean-square (RMS) voltage of the terminal 40 msec of the QRS complex, and the total duration of the signal-averaged QRS vector complex were measured. The low-amplitude signals were abnormally prolonged in 22 of 50 patients (44%); the RMS-V was abnormal (less than 20 microV) in 21 of 50 patients (58%), and the signal-averaged vector complex was abnormal (greater than 120 msec) in 15 of 46 patients (33%) without bundle branch block. There was no significant correlation between any of the signal-averaged parameters and site of AMI or total creatine kinase (CK) and CK-MB values. On the basis of the occurrence of spontaneous ventricular tachycardia in the acute and postcoronary care phase of AMI, the patients were divided into two groups. Group I consisted of 31 patients (62%) who had no documented ventricular tachycardia and group II consisted of 19 patients (38%) who had one or more runs of ventricular tachycardia. Fourteen of the 19 patients in group II (73.6%) had nonsustained ventricular tachycardia and five patients (26.3%) suffered sustained ventricular tachycardia/ventricular fibrillation or sudden death.(ABSTRACT TRUNCATED AT 250 WORDS)
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
AIM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jul
|
| pubmed:issn |
0009-7322
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| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
72
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
105-11
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| pubmed:dateRevised |
2007-11-15
|
| pubmed:meshHeading |
pubmed-meshheading:4006121-Adult,
pubmed-meshheading:4006121-Aged,
pubmed-meshheading:4006121-Arrhythmias, Cardiac,
pubmed-meshheading:4006121-Electrocardiography,
pubmed-meshheading:4006121-Heart Conduction System,
pubmed-meshheading:4006121-Heart Rate,
pubmed-meshheading:4006121-Humans,
pubmed-meshheading:4006121-Male,
pubmed-meshheading:4006121-Middle Aged,
pubmed-meshheading:4006121-Myocardial Infarction,
pubmed-meshheading:4006121-Tachycardia
|
| pubmed:year |
1985
|
| pubmed:articleTitle |
Quantitative analysis of the high-frequency components of the signal-averaged QRS complex in patients with acute myocardial infarction: a prospective study.
|
| pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.
|