Osborn wave

Schematic representation of normal ECG
Atrial fibrillation and Osborne J wave in a person with hypothermia

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.

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.

Eponymm

These waves were definitively described in 1953 by JJ Osborn and were named in his honor.[6]

References

  1. ^ 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. 
  2. ^ 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. 
  3. ^ "ecg_6lead018.html". http://library.med.utah.edu/kw/ecg/mml/ecg_6lead018.html. Retrieved 2008-12-20. 
  4. ^ "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. 
  5. ^ Marx, John (2010). Rosen's emergency medicine: concepts and clinical practice 7th edition. Philadelphia, PA: Mosby/Elsevier. p. 1869. ISBN 9780323054720. 
  6. ^ Osborn JJ. Experimental hypothermia: Respiratory and blood pH changes in relation to cardiac function. Am J Physiol 1953; 175: 389-398.

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Osborn — may refer to: Contents 1 People 2 Places 3 Companies 4 …   Wikipedia

  • T wave alternans — (TWA) is a periodic beat to beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG). T wave of ECG TWA was first described in 1908. At that time, only large variations ( macroscopic TWA) could be detected.… …   Wikipedia

  • Electrocardiography — ECG redirects here. For other uses, see ECG (disambiguation). Not to be confused with echocardiogram, electromyogram, electroencephalogram, or EEG. Electrocardiography Intervention Image showing a patient connected to the 10 electrodes necessary …   Wikipedia

  • Left ventricular hypertrophy — Classification and external resources A heart with left ventricular hypertrophy in short axis view ICD 10 I …   Wikipedia

  • Arrhythmogenic right ventricular dysplasia — Classification and external resources Photomicrograph of an ARVC heart. ICD 10 I …   Wikipedia

  • Supraventricular tachycardia — Classification and external resources Lead II electrocardiogram strip showing SVT with a heart rate of about 150. ICD 10 I …   Wikipedia

  • Circulatory system — This article is about the organ system. For the band, see Circulatory System. For transport in plants, see Vascular tissue. Circulatory system …   Wikipedia

  • Myocardial infarction — Heart attack redirects here. For other uses, see Heart attack (disambiguation). Myocardial infarction Classification and external resources Diagram of a myocardial infarction (2) of the tip of the anterior wall of the heart (an apical infarct)… …   Wikipedia

  • Premature ventricular contraction — Classification and external resources A premature ventricular contraction marked by the arrow. ICD 10 I …   Wikipedia

  • Mitral stenosis — Classification and external resources Mitral stenosis with marked thickening of the leaflets and left atrial hypertrophy. Superior view. Autopsy preparation …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.