Linked Life Data

3337025

Source:http://linkedlifedata.com/resource/pubmed/id/3337025

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1988-2-24
pubmed:abstractText
This study was designed to examine 2 hypotheses: that acute myocardial infarction (AMI) alters early cardiac activation measured by signal-averaging; and that the magnitude of abnormality of early activation may be greater in patients with post-AMI ventricular tachycardia (VT). We examined the root-mean square voltage amplitude in 10-ms intervals over the first 80-ms of the signal-averaged QRS complex. Data from 42 healthy volunteers were compared with those from 52 patients with previous AMI (24 anterior) but no VT and 46 post-AMI patients (33 anterior AMI) with recurrent sustained VT. Patients with VT differed from other post-AMI patients because of lower left ventricular ejection fraction, more frequent aneurysm formation and higher levels of ventricular ectopic activity. A significant decrease in initial voltage amplitude occurred at 30 to 40 ms after the beginning of the QRS in both anterior and inferior AMI patients compared with the normal group. A further significant decrease in initial amplitude occurred in VT patients both after anterior and inferior AMI. These differences persisted for the remainder of the 80-ms interval. These changes were weakly related to QRS duration (r = 0.45), ejection fraction (r = 0.50) and poorly correlated with the presence of Q waves on 12-lead electrocardiogram (r = 0.21). Direct endocardial catheter recordings performed in VT patients confirmed abnormalities of local septal activation after anterior and inferior AMI.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0002-9149
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
61
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
99-103
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Alterations in the initial portion of the signal-averaged QRS complex in acute myocardial infarction with ventricular tachycardia.
pubmed:affiliation
Medical Intensive Care Unit, Hospital of the University of Pennsylvania.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't