Close physical contact of the heart with diaphragm causes pseudo-asynergy of left ventricular inferior wall in normal subjects.
Paradoxical outward movement of left ventricular (LV) inferior wall in systole is occasionally recognized in normal subjects and clinically important in terms of the differential diagnosis between physiological pseudo-asynergy and pathological asynergy. In this study, the potential mechanisms by whi...
| Publicado en: | Echocardiography Vol. 21; no. 7; pp. 573 - 580 |
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| Autores principales: | , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Wiley-Blackwell
Oct2004
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106083050&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106083050 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 07422822 GSE jtl: Echocardiography issn: 07422822 maglogo: Y pubinfo: dt: Oct2004 vid: 21 iid: 7 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 106083050 2009399986 10.1111/j.0742-2822.2004.03058.x NLM15488083 106083050 ppf: 573 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Close physical contact of the heart with diaphragm causes pseudo-asynergy of left ventricular inferior wall in normal subjects. aug: au: Sakurai S Takenaka K Shiojima I Sonoda M Uno K Nakahara K Nagai R sug: subj: Cardiovascular System Physiology Diaphragm Physiology Posture Diaphragm Ultrasonography Echocardiography Electrocardiography Endocardium Physiopathology Endocardium Ultrasonography Incidence Reference Values Study Design Systole Ventricular Dysfunction, Left Ultrasonography Human ab: Paradoxical outward movement of left ventricular (LV) inferior wall in systole is occasionally recognized in normal subjects and clinically important in terms of the differential diagnosis between physiological pseudo-asynergy and pathological asynergy. In this study, the potential mechanisms by which pseudo-asynergy of LV inferior wall (PLI) is observed in normal subjects were investigated. PLI was defined as the outward movement of LV inferior wall observed during more than 50% of systole. The incidence of PLI was evaluated in 7843 consecutive subjects in routine echocardiography. The effects of body position and artificial gravity on the manifestation of PLI were also examined. PLI was observed in 0.11% (9/7842) of subjects on left lateral position. Measurement of the angle formed by LV long-axis and the long-axis of the body on frontal plane revealed that hearts in subjects with PLI were in relatively horizontal position. PLI was observed on sitting position in 43% (40/92) of subjects without PLI on left lateral position. The subjects with sitting position-induced PLI exhibited significantly higher obesity index. PLI was also induced by artificial gravity in 67% (14/21) of healthy volunteers on supine position, and the degree of PLI correlated with the intensity of gravity. Although the incidence of PLI in routine echocardiography is relatively low, PLI can be induced in normal subjects by any condition that causes close contact of LV inferior wall to diaphragm. Thus, PLI should be taken into consideration in the differential diagnosis of abnormal LV inferior wall motion, especially when performing exercise echocardiography.(ECHOCARDIOGRAPHY, Volume 21, October 2004) pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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