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Acute Cardiac Care Volume 8, 2006 - Issue 2
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LETTER TO THE EDITOR

Ultrasound attenuation behind coronary atheroma without calcification: Mechanism revealed by autopsy

Hisao Hara Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, JapanCorrespondence[email protected]
,
Taro Tsunoda Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Masao Moroi Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Tetsuya Kubota Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Taeko Kunimasa Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Masanori Shiba Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Masamichi Wada Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Takahiro Tsuji Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Raisuke Iijima Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Rintaro Nakajima Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
,
Takashi Yoshitama Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
&
Masato Nakamura Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan
 show all
Pages 110-112 | Accepted 15 Feb 2006, Published online: 10 Jul 2009
 
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Abstract

When performing intravascular ultrasound studies, the backward echo image can show marked attenuation, although there are no calcified deposits and it may be impossible to detect the intraplaque architecture. The pathology underlying this phenomenon was investigated in autopsy specimens. We hypothesize that the mechanism responsible for the attenuation involves micro‐calcification and lipid in unstable plaques causing ultrasonic wave reflection and dispersion.

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