Document Detail

ST changes and temporal relation to the J point during heart rate increase and myocardial ischemia.
MedLine Citation:
PMID:  18976774     Owner:  NLM     Status:  MEDLINE    
There is no concensus concerning where in the ST segment to measure. We studied the relation between different J point intervals to ST results during tachycardia and ischemia. Symptomatic (anesthetized) patients with coronary artery disease were paced at ascending incremental levels until they became ischemic. ST vector magnitude and ST vector change from baseline (STC-VM) as well as the sum of ST changes from all 12 electrocardiogram (ECG) leads (ECG ST sum) were measured at J point 0 millisecond, J + 20, J + 60, and J + 80 milliseconds for 34 patients. ST segments increased in similar fashion during pacing and ischemia. There was no difference in ST results when measurement was performed at different time intervals for both STC-VM and ECG ST sum. We conclude that ST assessment by ST change from baseline is not affected by different J point intervals during increased heart rate and ischemia in this clinical model of pacing-induced ischemia and vectorcardiographic ST analysis.
Michael F Haney; Sören Häggmark; Göran Johansson; Ulf Näslund
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-10-30
Journal Detail:
Title:  Journal of electrocardiology     Volume:  42     ISSN:  1532-8430     ISO Abbreviation:  J Electrocardiol     Publication Date:    2009 Jan-Feb
Date Detail:
Created Date:  2008-12-16     Completed Date:  2009-02-27     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  6-11     Citation Subset:  IM    
Anesthesiology and Intensive Care Medicine, University Hospital, Umeå, Sweden.
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MeSH Terms
Arrhythmias, Cardiac / complications,  diagnosis*,  physiopathology*
Diagnosis, Computer-Assisted / methods*
Electrocardiography / methods*
Heart Rate*
Myocardial Ischemia / complications,  diagnosis*,  physiopathology*

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