Osborn wave
Osborn waves (also known as camel-hump sign, late delta wave, hathook junction, hypothermic wave, prominent J wave ,[1] K wave, H wave or current of injury) are a electrocardiogram finding.[2]
Osborn waves are positive deflections occurring at the junction between the QRS complex and the ST segment,[3][4] where the S point, also known as the J point, has a myocardial infarction-like elevation.
[edit] Causes
They are usually observed in people suffering from hypothermia with a temperature of less than 32 C,[5] though they may also occur in people with high blood levels of calcium (hypercalcemia), brain injury, vasospastic angina, or ventricular fibrillation.
[edit] Eponymm
These waves were definitively described in 1953 by JJ Osborn and were named in his honor.[6]
[edit] References
- ^ Aydin M, Gursurer M, Bayraktaroglu T, Kulah E, Onuk T (2005). "Prominent J wave (Osborn wave) with coincidental hypothermia in a 64-year-old woman". Tex Heart Inst J 32 (1): 105. PMC 555838. PMID 15902836. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=555838.
- ^ Maruyama M, Kobayashi Y, Kodani E, et al. (2004). "Osborn waves: history and significance". Indian Pacing Electrophysiol J 4 (1): 33–9. PMC 1501063. PMID 16943886. http://www.ipej.org/4/33.
- ^ "ecg_6lead018.html". http://library.med.utah.edu/kw/ecg/mml/ecg_6lead018.html. Retrieved 2008-12-20.
- ^ "THE MERCK MANUAL OF GERIATRICS, Ch. 67, Hyperthermia and Hypothermia, Fig. 67-1". http://www.merck.com/mkgr/mmg/figures/67f1.jsp. Retrieved 2008-12-20.
- ^ Marx, John (2010). Rosen's emergency medicine: concepts and clinical practice 7th edition. Philadelphia, PA: Mosby/Elsevier. p. 1869. ISBN 9780323054720.
- ^ Osborn JJ. Experimental hypothermia: Respiratory and blood pH changes in relation to cardiac function. Am J Physiol 1953; 175: 389-398.
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