The significance of U wave polarity in patients with a prior anterior myocardial infarction
The significance of the polarity of U waves in left precordial leads in patients with a prior anterior myocardial infarction was evaluated in relation to left ventricular function and wall motion by left ventriculography. Ninety-six such patients, with a mean age of 53 years, were divided into three...
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| Veröffentlicht in: | European heart journal 1990-07, Vol.11 (7), p.634-642 |
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| creator | KANEMOTO, N. HOSOKAWA, J. IMAOKA, C. |
| description | The significance of the polarity of U waves in left precordial leads in patients with a prior anterior myocardial infarction was evaluated in relation to left ventricular function and wall motion by left ventriculography. Ninety-six such patients, with a mean age of 53 years, were divided into three groups according to the polarity ofU waves: positive U waves (group P), isoelectric or flat U waves (group F), and negative U waves (group N). The following parameters were analysed: (I) Selvester ECG score; (2) global ejection fraction (EF); (3) regional area change; (4) number of asynergic and akinetic segment al radii; (5) asynergic and akinetic areas. Fifteen patients served as controls. The Selvester ECG scores increased progressively and EF decreased successively with statistically significant differences between groups P, F, and N (P |
| doi_str_mv | 10.1093/oxfordjournals.eurheartj.a059769 |
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Ninety-six such patients, with a mean age of 53 years, were divided into three groups according to the polarity ofU waves: positive U waves (group P), isoelectric or flat U waves (group F), and negative U waves (group N). The following parameters were analysed: (I) Selvester ECG score; (2) global ejection fraction (EF); (3) regional area change; (4) number of asynergic and akinetic segment al radii; (5) asynergic and akinetic areas. Fifteen patients served as controls. The Selvester ECG scores increased progressively and EF decreased successively with statistically significant differences between groups P, F, and N (P<0.01, respectively). The sensitivity of negative U waves for predicting EF of less than 50% was 88.0%, the specificity 81.9%, and the accuracy 84.4%. The incidence of regional area change at the apex of less than 20% was 10.0% in group P, 35.9% in group F, and 74.3% in group N (P < 0.01). The number of dyssynergic and akinetic radii, and asynergic and akinetic areas increased progressively from group P to F, to N (P < 0.01). These results demonstrate that the polarity of U waves correlated significantly with left ventricular function and wall motion as well as the size of myocardial infarction. Negative U waves are an important sign of extensive myocardial infarction involving the apex with global eject ion fraction of less than 50%. Negative U waves may be associated with lateral ischaemia.</description><identifier>ISSN: 0195-668X</identifier><identifier>EISSN: 1522-9645</identifier><identifier>DOI: 10.1093/oxfordjournals.eurheartj.a059769</identifier><identifier>PMID: 2373098</identifier><language>eng</language><publisher>England: Oxford University Press</publisher><subject>Adult ; Aged ; anterior myocardial infarction ; apical infarction ; Cineangiography ; Coronary Angiography ; Electrocardiography ; Female ; global ejection fraction ; Heart Ventricles - diagnostic imaging ; Humans ; Image Processing, Computer-Assisted ; Male ; Middle Aged ; Myocardial Contraction - physiology ; Myocardial Infarction - diagnosis ; Myocardial Infarction - physiopathology ; negative U wave ; Polarity of U wave ; Stroke Volume - physiology</subject><ispartof>European heart journal, 1990-07, Vol.11 (7), p.634-642</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c364t-6359679fa80b116de9794ad52d28183d5cb9fa4be7b8b9478e51b3c6c12b038e3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/2373098$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>KANEMOTO, N.</creatorcontrib><creatorcontrib>HOSOKAWA, J.</creatorcontrib><creatorcontrib>IMAOKA, C.</creatorcontrib><title>The significance of U wave polarity in patients with a prior anterior myocardial infarction</title><title>European heart journal</title><addtitle>Eur Heart J</addtitle><description>The significance of the polarity of U waves in left precordial leads in patients with a prior anterior myocardial infarction was evaluated in relation to left ventricular function and wall motion by left ventriculography. Ninety-six such patients, with a mean age of 53 years, were divided into three groups according to the polarity ofU waves: positive U waves (group P), isoelectric or flat U waves (group F), and negative U waves (group N). The following parameters were analysed: (I) Selvester ECG score; (2) global ejection fraction (EF); (3) regional area change; (4) number of asynergic and akinetic segment al radii; (5) asynergic and akinetic areas. Fifteen patients served as controls. The Selvester ECG scores increased progressively and EF decreased successively with statistically significant differences between groups P, F, and N (P<0.01, respectively). The sensitivity of negative U waves for predicting EF of less than 50% was 88.0%, the specificity 81.9%, and the accuracy 84.4%. The incidence of regional area change at the apex of less than 20% was 10.0% in group P, 35.9% in group F, and 74.3% in group N (P < 0.01). The number of dyssynergic and akinetic radii, and asynergic and akinetic areas increased progressively from group P to F, to N (P < 0.01). These results demonstrate that the polarity of U waves correlated significantly with left ventricular function and wall motion as well as the size of myocardial infarction. Negative U waves are an important sign of extensive myocardial infarction involving the apex with global eject ion fraction of less than 50%. Negative U waves may be associated with lateral ischaemia.</description><subject>Adult</subject><subject>Aged</subject><subject>anterior myocardial infarction</subject><subject>apical infarction</subject><subject>Cineangiography</subject><subject>Coronary Angiography</subject><subject>Electrocardiography</subject><subject>Female</subject><subject>global ejection fraction</subject><subject>Heart Ventricles - diagnostic imaging</subject><subject>Humans</subject><subject>Image Processing, Computer-Assisted</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Myocardial Contraction - physiology</subject><subject>Myocardial Infarction - diagnosis</subject><subject>Myocardial Infarction - physiopathology</subject><subject>negative U wave</subject><subject>Polarity of U wave</subject><subject>Stroke Volume - physiology</subject><issn>0195-668X</issn><issn>1522-9645</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1990</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpVkF-LEzEUxYMoa139CEKexJepyWTy701d1BULguxi0YdwJ3PHpk4nNcm422_vaEvBp3vhHM6950fIS86WnFnxKt73MXXbOKURhrzEKW0QUtkugUmrlX1AFlzWdWVVIx-SBeNWVkqZ9WPyJOctY8wori7IRS20YNYsyPebDdIcfoyhDx5GjzT29JbewW-k-zhACuVAw0j3UAKOJdO7UDYU6D6FmCiMBf8tu0P0kLoAw2zuIfkS4viUPOrnL_HZaV6S2_fvbq6uq9XnDx-v3qwqL1RTKiWkVdr2YFjLuerQattAJ-uuNtyITvp2FpsWdWta22iDkrfCK8_rlgmD4pK8OObuU_w1YS5uF7LHYYAR45SdtsbOfeVsfH00-hRzTti7ucYO0sFx5v7ydf_zdWe-7sR3jnh-ujW1O-zOASegs14d9ZAL3p9lSD-d0kJLd73-5tZvV1-sqb-6T-IPTZuRWg</recordid><startdate>19900701</startdate><enddate>19900701</enddate><creator>KANEMOTO, N.</creator><creator>HOSOKAWA, J.</creator><creator>IMAOKA, C.</creator><general>Oxford University Press</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>19900701</creationdate><title>The significance of U wave polarity in patients with a prior anterior myocardial infarction</title><author>KANEMOTO, N. ; HOSOKAWA, J. ; IMAOKA, C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c364t-6359679fa80b116de9794ad52d28183d5cb9fa4be7b8b9478e51b3c6c12b038e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>Adult</topic><topic>Aged</topic><topic>anterior myocardial infarction</topic><topic>apical infarction</topic><topic>Cineangiography</topic><topic>Coronary Angiography</topic><topic>Electrocardiography</topic><topic>Female</topic><topic>global ejection fraction</topic><topic>Heart Ventricles - diagnostic imaging</topic><topic>Humans</topic><topic>Image Processing, Computer-Assisted</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Myocardial Contraction - physiology</topic><topic>Myocardial Infarction - diagnosis</topic><topic>Myocardial Infarction - physiopathology</topic><topic>negative U wave</topic><topic>Polarity of U wave</topic><topic>Stroke Volume - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KANEMOTO, N.</creatorcontrib><creatorcontrib>HOSOKAWA, J.</creatorcontrib><creatorcontrib>IMAOKA, C.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>European heart journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KANEMOTO, N.</au><au>HOSOKAWA, J.</au><au>IMAOKA, C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The significance of U wave polarity in patients with a prior anterior myocardial infarction</atitle><jtitle>European heart journal</jtitle><addtitle>Eur Heart J</addtitle><date>1990-07-01</date><risdate>1990</risdate><volume>11</volume><issue>7</issue><spage>634</spage><epage>642</epage><pages>634-642</pages><issn>0195-668X</issn><eissn>1522-9645</eissn><abstract>The significance of the polarity of U waves in left precordial leads in patients with a prior anterior myocardial infarction was evaluated in relation to left ventricular function and wall motion by left ventriculography. Ninety-six such patients, with a mean age of 53 years, were divided into three groups according to the polarity ofU waves: positive U waves (group P), isoelectric or flat U waves (group F), and negative U waves (group N). The following parameters were analysed: (I) Selvester ECG score; (2) global ejection fraction (EF); (3) regional area change; (4) number of asynergic and akinetic segment al radii; (5) asynergic and akinetic areas. Fifteen patients served as controls. The Selvester ECG scores increased progressively and EF decreased successively with statistically significant differences between groups P, F, and N (P<0.01, respectively). The sensitivity of negative U waves for predicting EF of less than 50% was 88.0%, the specificity 81.9%, and the accuracy 84.4%. The incidence of regional area change at the apex of less than 20% was 10.0% in group P, 35.9% in group F, and 74.3% in group N (P < 0.01). The number of dyssynergic and akinetic radii, and asynergic and akinetic areas increased progressively from group P to F, to N (P < 0.01). These results demonstrate that the polarity of U waves correlated significantly with left ventricular function and wall motion as well as the size of myocardial infarction. Negative U waves are an important sign of extensive myocardial infarction involving the apex with global eject ion fraction of less than 50%. Negative U waves may be associated with lateral ischaemia.</abstract><cop>England</cop><pub>Oxford University Press</pub><pmid>2373098</pmid><doi>10.1093/oxfordjournals.eurheartj.a059769</doi><tpages>9</tpages></addata></record> |
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| ispartof | European heart journal, 1990-07, Vol.11 (7), p.634-642 |
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| language | eng |
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| source | MEDLINE; Oxford University Press Journals Digital Archive Legacy |
| subjects | Adult Aged anterior myocardial infarction apical infarction Cineangiography Coronary Angiography Electrocardiography Female global ejection fraction Heart Ventricles - diagnostic imaging Humans Image Processing, Computer-Assisted Male Middle Aged Myocardial Contraction - physiology Myocardial Infarction - diagnosis Myocardial Infarction - physiopathology negative U wave Polarity of U wave Stroke Volume - physiology |
| title | The significance of U wave polarity in patients with a prior anterior myocardial infarction |
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