Significance of left circumflex artery-related acute myocardial infarction without ST-T changes

Abstract Introduction Left circumflex (LC)–related acute myocardial infarction (AMI) presenting without ST-T changes has been underdiagnosed in the emergency department. There is little information on its clinical features and significance. Aims The aims of the study were to investigate the clinical...

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Veröffentlicht in:The American journal of emergency medicine 2010-02, Vol.28 (2), p.183-188
Hauptverfasser: Chua, Su-Kiat, MD, Shyu, Kou-Gi, MD, Cheng, Jun-Jack, MD, Liou, Jer-Young, MD, Lin, Sheng-Chang, MD, Hung, Huei-Fong, MD, Lee, Shih-Huang, MD, Chiu, Chiung-Zuan, MD, Lo, Huey-Ming, MD
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container_end_page 188
container_issue 2
container_start_page 183
container_title The American journal of emergency medicine
container_volume 28
creator Chua, Su-Kiat, MD
Shyu, Kou-Gi, MD
Cheng, Jun-Jack, MD
Liou, Jer-Young, MD
Lin, Sheng-Chang, MD
Hung, Huei-Fong, MD
Lee, Shih-Huang, MD
Chiu, Chiung-Zuan, MD
Lo, Huey-Ming, MD
description Abstract Introduction Left circumflex (LC)–related acute myocardial infarction (AMI) presenting without ST-T changes has been underdiagnosed in the emergency department. There is little information on its clinical features and significance. Aims The aims of the study were to investigate the clinical characteristics and outcomes of LC-related AMI without ST-T changes. Population and Methods Ninety-six patients were admitted for LC-related AMI. Comparisons between those with and without ST-T changes were analyzed. Results Twenty-two patients (23%) did not have ST-T changes, whereas 74 patients (77%) had them. Patients without ST-T changes had younger age (55.6 ± 16.8 vs 62.6 ± 12.0 years, P = .03), fewer presented as Killip III/IV (4.5% vs 27.4%, P = .02) and with lower creatine kinase (1647.3 ± 1602.2 vs 2778.2 ± 2343.3 IU/L, P = .037) and creatine kinase-MB (136.8 ± 130.3 vs 247.7 ± 200.0 IU/L, P = .017), and more were with concurrent culprit lesion in the middle or distal LC and right- or balanced-dominant coronary circulation (86.4% vs 44.6%, P < .001). During follow-up, the need for repeat percutaneous coronary intervention (48.6% vs 45.5%, P = .40) and recurrent infarction (13.5% vs 13.6%, P = .62) were similar between the 2 groups. The 30-day mortality (0% vs 5.4%, P = .35) and overall mortality rate (4.5% vs 12.2%, P = .28) between them were not different statistically. Conclusion The relatively lower prevalence of LC-related AMI without ST-T changes in the study might be underestimated. These patients have smaller infarct size than patients with ST-T changes without differences in the short- and long-term outcomes between them.
doi_str_mv 10.1016/j.ajem.2008.11.010
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There is little information on its clinical features and significance. Aims The aims of the study were to investigate the clinical characteristics and outcomes of LC-related AMI without ST-T changes. Population and Methods Ninety-six patients were admitted for LC-related AMI. Comparisons between those with and without ST-T changes were analyzed. Results Twenty-two patients (23%) did not have ST-T changes, whereas 74 patients (77%) had them. Patients without ST-T changes had younger age (55.6 ± 16.8 vs 62.6 ± 12.0 years, P = .03), fewer presented as Killip III/IV (4.5% vs 27.4%, P = .02) and with lower creatine kinase (1647.3 ± 1602.2 vs 2778.2 ± 2343.3 IU/L, P = .037) and creatine kinase-MB (136.8 ± 130.3 vs 247.7 ± 200.0 IU/L, P = .017), and more were with concurrent culprit lesion in the middle or distal LC and right- or balanced-dominant coronary circulation (86.4% vs 44.6%, P &lt; .001). During follow-up, the need for repeat percutaneous coronary intervention (48.6% vs 45.5%, P = .40) and recurrent infarction (13.5% vs 13.6%, P = .62) were similar between the 2 groups. The 30-day mortality (0% vs 5.4%, P = .35) and overall mortality rate (4.5% vs 12.2%, P = .28) between them were not different statistically. Conclusion The relatively lower prevalence of LC-related AMI without ST-T changes in the study might be underestimated. These patients have smaller infarct size than patients with ST-T changes without differences in the short- and long-term outcomes between them.</description><identifier>ISSN: 0735-6757</identifier><identifier>EISSN: 1532-8171</identifier><identifier>DOI: 10.1016/j.ajem.2008.11.010</identifier><identifier>PMID: 20159388</identifier><identifier>CODEN: AJEMEN</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Adult ; Aged ; Aged, 80 and over ; Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy ; Angina pectoris ; Biological and medical sciences ; Cardiology. Vascular system ; Cardiovascular disease ; Coronary Angiography ; Coronary heart disease ; Diagnostic Errors - prevention &amp; control ; Electrocardiography ; Emergency ; Emergency medical care ; Female ; Heart ; Heart attacks ; Humans ; Intensive care medicine ; Logistic Models ; Male ; Medical sciences ; Middle Aged ; Mortality ; Multivariate Analysis ; Myocardial infarction ; Myocardial Infarction - diagnosis ; Myocardial Infarction - physiopathology ; Retrospective Studies ; Treatment Outcome ; Veins &amp; arteries</subject><ispartof>The American journal of emergency medicine, 2010-02, Vol.28 (2), p.183-188</ispartof><rights>Elsevier Inc.</rights><rights>2010 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright 2010 Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c468t-dc6ed748ef2514854a8bf94336b476125324eeeb303ca4dd46340e840d9d64cc3</citedby><cites>FETCH-LOGICAL-c468t-dc6ed748ef2514854a8bf94336b476125324eeeb303ca4dd46340e840d9d64cc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0735675708007985$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=22560962$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20159388$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chua, Su-Kiat, MD</creatorcontrib><creatorcontrib>Shyu, Kou-Gi, MD</creatorcontrib><creatorcontrib>Cheng, Jun-Jack, MD</creatorcontrib><creatorcontrib>Liou, Jer-Young, MD</creatorcontrib><creatorcontrib>Lin, Sheng-Chang, MD</creatorcontrib><creatorcontrib>Hung, Huei-Fong, MD</creatorcontrib><creatorcontrib>Lee, Shih-Huang, MD</creatorcontrib><creatorcontrib>Chiu, Chiung-Zuan, MD</creatorcontrib><creatorcontrib>Lo, Huey-Ming, MD</creatorcontrib><title>Significance of left circumflex artery-related acute myocardial infarction without ST-T changes</title><title>The American journal of emergency medicine</title><addtitle>Am J Emerg Med</addtitle><description>Abstract Introduction Left circumflex (LC)–related acute myocardial infarction (AMI) presenting without ST-T changes has been underdiagnosed in the emergency department. There is little information on its clinical features and significance. Aims The aims of the study were to investigate the clinical characteristics and outcomes of LC-related AMI without ST-T changes. Population and Methods Ninety-six patients were admitted for LC-related AMI. Comparisons between those with and without ST-T changes were analyzed. Results Twenty-two patients (23%) did not have ST-T changes, whereas 74 patients (77%) had them. Patients without ST-T changes had younger age (55.6 ± 16.8 vs 62.6 ± 12.0 years, P = .03), fewer presented as Killip III/IV (4.5% vs 27.4%, P = .02) and with lower creatine kinase (1647.3 ± 1602.2 vs 2778.2 ± 2343.3 IU/L, P = .037) and creatine kinase-MB (136.8 ± 130.3 vs 247.7 ± 200.0 IU/L, P = .017), and more were with concurrent culprit lesion in the middle or distal LC and right- or balanced-dominant coronary circulation (86.4% vs 44.6%, P &lt; .001). During follow-up, the need for repeat percutaneous coronary intervention (48.6% vs 45.5%, P = .40) and recurrent infarction (13.5% vs 13.6%, P = .62) were similar between the 2 groups. The 30-day mortality (0% vs 5.4%, P = .35) and overall mortality rate (4.5% vs 12.2%, P = .28) between them were not different statistically. Conclusion The relatively lower prevalence of LC-related AMI without ST-T changes in the study might be underestimated. These patients have smaller infarct size than patients with ST-T changes without differences in the short- and long-term outcomes between them.</description><subject>Adult</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy</subject><subject>Angina pectoris</subject><subject>Biological and medical sciences</subject><subject>Cardiology. 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Intensive care medicine. Transfusions. Cell therapy and gene therapy</topic><topic>Angina pectoris</topic><topic>Biological and medical sciences</topic><topic>Cardiology. 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There is little information on its clinical features and significance. Aims The aims of the study were to investigate the clinical characteristics and outcomes of LC-related AMI without ST-T changes. Population and Methods Ninety-six patients were admitted for LC-related AMI. Comparisons between those with and without ST-T changes were analyzed. Results Twenty-two patients (23%) did not have ST-T changes, whereas 74 patients (77%) had them. Patients without ST-T changes had younger age (55.6 ± 16.8 vs 62.6 ± 12.0 years, P = .03), fewer presented as Killip III/IV (4.5% vs 27.4%, P = .02) and with lower creatine kinase (1647.3 ± 1602.2 vs 2778.2 ± 2343.3 IU/L, P = .037) and creatine kinase-MB (136.8 ± 130.3 vs 247.7 ± 200.0 IU/L, P = .017), and more were with concurrent culprit lesion in the middle or distal LC and right- or balanced-dominant coronary circulation (86.4% vs 44.6%, P &lt; .001). During follow-up, the need for repeat percutaneous coronary intervention (48.6% vs 45.5%, P = .40) and recurrent infarction (13.5% vs 13.6%, P = .62) were similar between the 2 groups. The 30-day mortality (0% vs 5.4%, P = .35) and overall mortality rate (4.5% vs 12.2%, P = .28) between them were not different statistically. Conclusion The relatively lower prevalence of LC-related AMI without ST-T changes in the study might be underestimated. These patients have smaller infarct size than patients with ST-T changes without differences in the short- and long-term outcomes between them.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>20159388</pmid><doi>10.1016/j.ajem.2008.11.010</doi><tpages>6</tpages></addata></record>
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subjects Adult
Aged
Aged, 80 and over
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Angina pectoris
Biological and medical sciences
Cardiology. Vascular system
Cardiovascular disease
Coronary Angiography
Coronary heart disease
Diagnostic Errors - prevention & control
Electrocardiography
Emergency
Emergency medical care
Female
Heart
Heart attacks
Humans
Intensive care medicine
Logistic Models
Male
Medical sciences
Middle Aged
Mortality
Multivariate Analysis
Myocardial infarction
Myocardial Infarction - diagnosis
Myocardial Infarction - physiopathology
Retrospective Studies
Treatment Outcome
Veins & arteries
title Significance of left circumflex artery-related acute myocardial infarction without ST-T changes
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