Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
|
| pubmed:dateCreated |
1986-5-8
|
| pubmed:abstractText |
The extremely prominent negative U wave occasionally appears during a cardiac attack in variant angina pectoris. The clinical profile of the negative U wave was therefore studied in 80 patients with variant angina pectoris (VA) and 33 controls with resting angina pectoris (RA). The prominent negative U wave appeared in 55 of the patients with VA (68.8% of patients) and in 10 of the patients with RA (30.3%); thus, there was a significant difference in the appearance of the wave between the 2 groups of patients (p less than 0.001). The leads in which the negative U wave appeared were mostly consistent with those in which the ST segment was elevated. The negative U wave began to appear at about the time when ST-segment elevation began to improve; the wave then gradually became very prominent and then eventually disappeared. The patients with VA and also those with RA on whose ECGs the negative U wave appeared during exercise testing also had negative U waves during spontaneous episodes of angina. An investigation of the frequency of appearance of ST deviation and negative U waves during exercise testing, regardless of the type of angina pectoris, disclosed that the negative U wave appeared in 14 of 20 patients with ST-segment elevation (70% of patients), while the negative U wave appeared in only 52 of 519 patients with either no ST change or ST-segment depression (10.4%); thus, there was a significant difference in the appearance of the negative U wave between these 2 groups (p less than 0.001). Coronary cinearteriography failed to disclose any apparent difference between the appearance of the negative U wave and the presence of stenosis. The prognosis of VA and RA in patients with negative U waves was less favorable compared to those without negative U waves. In particular, we noted that of the 10 patients with RA associated with negative U waves, 4 died. Although the mechanism of the negative U wave is not yet known, we believe that the above findings contribute to its elucidation.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Nov
|
| pubmed:issn |
0021-4868
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
26
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
885-96
|
| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading |
pubmed-meshheading:3831409-Adult,
pubmed-meshheading:3831409-Aged,
pubmed-meshheading:3831409-Angina Pectoris, Variant,
pubmed-meshheading:3831409-Cineangiography,
pubmed-meshheading:3831409-Coronary Angiography,
pubmed-meshheading:3831409-Electrocardiography,
pubmed-meshheading:3831409-Exercise Test,
pubmed-meshheading:3831409-Female,
pubmed-meshheading:3831409-Humans,
pubmed-meshheading:3831409-Male,
pubmed-meshheading:3831409-Middle Aged,
pubmed-meshheading:3831409-Prognosis,
pubmed-meshheading:3831409-Rest
|
| pubmed:year |
1985
|
| pubmed:articleTitle |
Prominent negative U wave in variant angina pectoris.
|
| pubmed:publicationType |
Journal Article
|