electrical alternans

電気的交互脈

WordNet

1. (of a situation) exceptionally tense; "an atmosphere electric with suspicion"
2. a car that is powered by electricity (同)electric automobile, electric car
3. using or providing or producing or transmitting or operated by electricity; "electric current"; "electric wiring"; "electrical appliances"; "an electrical storm" (同)electrical
4. affected by emotion as if by electricity; thrilling; "gave an electric reading of the play"; "the new leader had a galvanic effect on morale" (同)galvanic, galvanizing, galvanising
5. relating to or concerned with electricity; "an electrical engineer"; "electrical and mechanical engineering industries"

PrepTutorEJDIC

1. 《名詞の前にのみ用いて》『電気の』;電気が引き起こす / 《名詞の前にのみ用いて》電気で動く,電動の;電気を起こす,発電の / 興奮させる,はらはら(ぞくぞく)させる
2. 電気と関係のある / 電気を扱う

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/06/01 00:15:24」(JST)

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Electrical alternans as seen by changing QRS amplitudes best seen in lead II

Electrical alternans is an electrocardiographic phenomenon of alternation of QRS complex amplitude or axis between beats and a possible wandering base-line. It is seen in cardiac tamponade and severe pericardial effusion and is thought to be related to changes in the ventricular electrical axis due to fluid in the pericardium, as the heart essentially wobbles in the fluid filled pericardial sac.

This phenomenon was also redemonstrated in the literature by Osman, MD and Jehangir, MD in a patient with percardial temponade from a malignant pericardial effusion. The echocardiogram of the heart demonstrated the characteristic swinging along with alternating voltage on the ECG.

Generally electrical alternans can be seen with tamponade, and narrow AV junctional reenterant tachycardia with an accessory pathway (such as WPW syndrome). A similar phenomenon, pseudo-alternans, can be seen in bigeminal PVC in the PR interval, alternans pre-excitation, and alternans bundle branch block. For the most part however, the most serious condition to rule out is tamponade.

Electrical alternans with sinus tachycardia is a highly specific sign for large pericardial effusion. This is due to the swinging motion of the heart in the pericardial cavity causing a beat-to-beat variation in QRS axis and amplitude. Patients with cardiac tamponade and hemodynamic compromise should have emergency pericardiocentesis.

See also

• Cardiac tamponade
• Electrocardiogram

Sources

UpToDate Contents

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• 1. 心電図チュートリアル：その他の診断 ecg tutorial miscellaneous diagnoses
• 2. 心嚢液貯留の診断および治療 diagnosis and treatment of pericardial effusion
• 3. 心タンポナーデ cardiac tamponade
• 4. 胸部外傷を有する小児の初期評価および安定化 initial evaluation and stabilization of children with thoracic trauma
• 5. 悪性腫瘍関連心膜疾患 pericardial disease associated with malignancy

English Journal

• Repolarization alternans heterogeneity in healthy subjects and acute myocardial infarction patients.

• Burattini L, Bini S, Burattini R.SourceDepartment of Information Engineering, Polytechnic University of Marche, 60131 Ancona, Italy.
• Medical engineering & physics.Med Eng Phys.2012 Apr;34(3):305-12. Epub 2011 Aug 10.
• An association between heterogeneity of repolarization alternans (RA) and cardiac electrical instability has been reported. Characterization of RA in health and identification of physiological RA heterogeneity may help discrimination of abnormal RA cases more likely associated to arrhythmic events.
• PMID 21835679

• Cardiac arrhythmia mechanisms in rats with heart failure induced by pulmonary hypertension.

• Benoist D, Stones R, Drinkhill MJ, Benson AP, Yang Z, Cassan C, Gilbert SH, Saint DA, Cazorla OF, Steele DS, Bernus O, White E.Source1University of Leeds.
• American journal of physiology. Heart and circulatory physiology.Am J Physiol Heart Circ Physiol.2012 Mar 16. [Epub ahead of print]
• Pulmonary hypertension provokes right heart failure and arrhythmias. Better understanding of mechanisms underlying these arrhythmias is needed to facilitate new therapeutic approaches for the hypertensive, failing right ventricle. The aim of our study was to identify mechanisms generating arrhythmia
• PMID 22427523

Japanese Journal

• Holter ECG in Pediatric Patients, How to Record and Analyze

• 新村 一郎
• Pediatric Cardiology and Cardiac Surgery 28(2), 96-102, 2012
• … To improve the electrical signal quality, the adequate attachment of the electrodes to the cleaned skin is required. … Two types of event recorders are available: Loop recorders which can save the electrical abnormalities for 30 sec to 60 sec prior to pressing the recording button (presymptom recording). …
• NAID 130002591132

• Atrioventricular reentrant tachycardia with a 2:1 right bundle branch block

• Kim Jun,Su Kim Jeong,Hyun Park Yong,Nam Gi-Byoung
• Journal of Arrhythmia 28(5), 294-296, 2012
• … A 2:1 bundle branch block is attributed to first- and second-degree bundle branch block, linking, electrical alternans, aberrancy, or supernormal conduction. …
• NAID 130002129499

• Elimination of Spiral Waves in Two Different Models: Electrical Defibrillation Revisited

• Maruyama Toru,Sakaguchi Hidetsugu
• Journal of Arrhythmia 27(Supplement), CP2_02-CP2_02, 2011
• … In Aliev-Panfilov model, alternans instability was observed by decreasing control parameter representing excitability. … In Luo-Rudy model, alternans instability was observed by reducing system size. …
• NAID 130002130144

Related Links

• Electrical Alternans

Electrical alternans is a broad term that describes alternate-beat variation in the direction, amplitude, and duration of any component of the ECG waveform (ie, P, PR, QRS, R-R, ST, T, U). It was first recognized by Hearing in 1909 and further characterized by Sir Thomas Lewis in 1910 as ...

• Electrical alternans

12-lead ECG library, Electrical alternans ... A 56 year old man with breathlessness and raised JVP. Pericardial effusion with electrical alternans The QRS axis alternates between beats. In this example it is best seen in the chest ...

Related Pictures

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★リンクテーブル★

リンク元	「電気的交互脈」
関連記事	「electric」「electrical」

「電気的交互脈」

　　[★]

英

electrical alternans

関

交互脈

「electric」

　　[★]

• adj.

• 電気の、電気的な

関

electrical、electrically、electricity、electro、electronic

　 　 　 　 　

「electrical」

　　[★]

• adj.

• 電気的な

関

electric、electrically、electronic