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Jeopardised Inferior Myocardium (JIM) Score: An Arithmetic Electrocardiographic Score to Predict the Infarct-Related Artery in Inferior Myocardial Infarction.
MedLine Citation:
PMID:  22892607     Owner:  NLM     Status:  In-Data-Review    
Introduction: A few electrocardiographic criteria have been described to identify the infarct-related artery in inferior myocardial infarction. The aim of this study was to devise an arithmetic score to further improve the diagnostic accuracy. Materials and Methods: From 2004 to 2006, 78 patients who underwent primary angioplasty for inferior myocardial infarction within 6 hours from symptom onset were recruited for electrocardiographic and angiographic analysis. Results: The mean age of patients was 65 ± 12 years with male predominance (74%). Less ST depression in lead I and aVL, and more prominent ST depression in lead V1-3 were observed in left circumfl ex artery (LCX) than right coronary artery (RCA) occlusions. In addition, more prominent ST depression in lead I and ST elevation in V1 were found in proximal RCA than distal RCA occlusions. Based on the fi ndings, the Jeopardised Inferior Myocardium (JIM) score was constructed and defi ned as [II-V3/III+V1- I]. The sensitivity and specifi city of JIM score ≤0.5 to predict proximal RCA occlusions; 0.5 <JIM score ≤1.5 to predict distal RCA occlusions; and JIM score >1.5 to predict LCX occlusions were 58% and 85%, 69% and 68%, and 79% and 94%, respectively. The accuracy of prediction is slightly better than the 2 previously reported criteria. Conclusion: By taking into account more leads, the JIM score is capable of identifying the infarct-related artery with an improved diagnostic accuracy.
Man Hong Jim; Kin Lam Tsui; Kai Hang Yiu; Gary Sh Cheung; Chung Wah Siu; Hee Hwa Ho; Wing Hing Chow; Shu Kin Li
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Annals of the Academy of Medicine, Singapore     Volume:  41     ISSN:  0304-4602     ISO Abbreviation:  Ann. Acad. Med. Singap.     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-08-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503289     Medline TA:  Ann Acad Med Singapore     Country:  Singapore    
Other Details:
Languages:  eng     Pagination:  300-4     Citation Subset:  IM    
Cardiac Medical Unit, Grantham Hospital, Hong Kong, ROC.
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