Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
|
| pubmed:dateCreated |
1994-7-22
|
| pubmed:abstractText |
The present study was undertaken to determine the value of abnormal late ventricular potentials on signal-averaged electrocardiograms (ECG) in identifying patients at risk of developing ventricular tachycardia or ventricular fibrillation in the early postoperative period after coronary artery bypass grafting. Signal-averaged ECGs were recorded immediately after operation in 72 patients. Abnormal late potentials were defined as the presence of 2 or 3 of the following: (1) root-mean-square amplitude of the last 40 ms of the QRS < 20 microV; (2) duration of the terminal QRS potentials (after 40 microV) > or = 39 ms; and (3) high-frequency QRS duration > 120 ms (in patients with conduction defects, only the first 2 criteria were used). Abnormal late ventricular potentials were present on the immediate postoperative signal-averaged ECG in 26 of the 72 patients (36%). Life-threatening ventricular tachyarrhythmias occurred in 6 patients. Late potentials were present in all 6 patients, but only in 20 of 66 (30%) who did not develop ventricular tachyarrhythmias (p < 0.005) (sensitivity 100%, specificity 70%, predictive accuracy 72%). Of 12 pre- and perioperative variables examined by univariate and multivariate regression analysis, the presence of late potentials on the signal-averaged ECG and low cardiac output postoperatively were found to be independent predictors of life-threatening tachyarrhythmias.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
AIM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jul
|
| pubmed:issn |
0002-9149
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
1
|
| pubmed:volume |
74
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
33-7
|
| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading |
pubmed-meshheading:8017302-Action Potentials,
pubmed-meshheading:8017302-Adult,
pubmed-meshheading:8017302-Aged,
pubmed-meshheading:8017302-Coronary Artery Bypass,
pubmed-meshheading:8017302-Coronary Disease,
pubmed-meshheading:8017302-Electrocardiography,
pubmed-meshheading:8017302-Female,
pubmed-meshheading:8017302-Heart Ventricles,
pubmed-meshheading:8017302-Humans,
pubmed-meshheading:8017302-Male,
pubmed-meshheading:8017302-Middle Aged,
pubmed-meshheading:8017302-Postoperative Complications,
pubmed-meshheading:8017302-Prospective Studies,
pubmed-meshheading:8017302-Signal Processing, Computer-Assisted,
pubmed-meshheading:8017302-Tachycardia, Ventricular,
pubmed-meshheading:8017302-Ventricular Fibrillation
|
| pubmed:year |
1994
|
| pubmed:articleTitle |
Usefulness of late potentials on the immediate postoperative signal-averaged electrocardiogram in predicting ventricular tachyarrhythmias early after isolated coronary artery bypass grafting.
|
| pubmed:affiliation |
Department of Cardiothoracic Surgery, Lady Davis Carmel Hospital, Haifa, Israel.
|
| pubmed:publicationType |
Journal Article
|