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Journal of Echocardiography

, Volume 16, Issue 4, pp 173–174 | Cite as

Provocation of clinically significant left ventricular outflow tract obstruction by postural change in patients with sigmoid septum

  • Yukina Hirata
  • Hirotsugu Yamada
  • Kenya Kusunose
  • Susumu Nishio
  • Yuta Torii
  • Yuki Horike
  • Masataka Sata
Case image in cardiovascular ultrasound

Notes

Compliance with ethical standards

Conflict of interest

Yukina Hirata, Hirotsugu Yamada, Kenya Kusunose, Susumu Nishio, Yuta Torii, Yuki Horike and Masataka Sata declare that they have no conflict of interest.

Human rights statements

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later revisions.

References

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    Dalldorf FG. Willis PWt Angled aorta (“sigmoid septum”) as a cause of hypertrophic subaortic stenosis. Hum Pathol. 1985;16:457–62.CrossRefGoogle Scholar
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    Etoh T, Matsuda J, Hanada Y, et al. Recurrent syncope induced by left ventricular outflow tract obstruction: demonstration in a patient with hypertrophic obstructive cardiomyopathy. J Cardiol. 1997;30:143–7.PubMedGoogle Scholar
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    Jensen MK, Havndrup O, Pecini R, et al. Comparison of Valsalva manoeuvre and exercise in echocardiographic evaluation of left ventricular outflow tract obstruction in hypertrophic cardiomyopathy. Eur J Echocardiogr. 2010;11:763–9.CrossRefGoogle Scholar
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    Yamaguchi Y, Mizumaki K, Iwamoto J, et al. Recurrent syncope in two patients with a sigmoid-shaped interventricular septum and no left ventricular hypertrophy. J Arrhythm. 2015;31:391–4.CrossRefGoogle Scholar
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    Kobayashi S, Sakai Y, Taguchi I, et al. Causes of an increased pressure gradient through the left ventricular outflow tract: a West Coast experience. J Echocardiography. 2017.  https://doi.org/10.1007/s12574-017-0352-6 CrossRefGoogle Scholar

Copyright information

© Japanese Society of Echocardiography 2018

Authors and Affiliations

  1. 1.Ultrasound Examination CenterTokushima University HospitalTokushimaJapan
  2. 2.Department of Community Medicine for CardiologyTokushima University Graduate School of Biomedical SciencesTokushimaJapan
  3. 3.Department of Cardiovascular MedicineTokushima University HospitalTokushimaJapan
  4. 4.Department of Clinical LaboratoryOsaka Saiseikai Nakatsu HospitalOsakaJapan

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