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Echocardiographic integrated backscatter for detecting progression and regression of aortic valve calcifications in rats.

Abstract：

BACKGROUND:Calcification is an independent predictor of mortality in calcific aortic valve disease (CAVD). The aim of this study was to evaluate the use of non-invasive, non-ionizing echocardiographic calibrated integrated backscatter (cIB) for monitoring progression and subsequent regression of aortic valvular calcifications in a rat model of reversible renal failure with CAVD, compared to histology. METHODS:28 male Wistar rats were prospectively followed during 21 weeks. Group 1 (N=14) was fed with a 0.5% adenine diet for 9 weeks to induce renal failure and CAVD. Group 2 (N=14) received a standard diet. At week 9, six animals of each group were killed. The remaining animals of group 1 (N=8) and group 2 (N=8) were kept on a standard diet for an additional 12 weeks. cIB of the aortic valve was calculated at baseline, 9 and 21 weeks, followed by measurement of the calcified area (Ca Area) on histology. RESULTS:At week 9, cIB values and Ca Area of the aortic valve were significantly increased in the adenine-fed rats compared to baseline and controls. After 12 weeks of adenine diet cessation, cIB values and Ca Area of group 1 decreased compared to week 9, while there was no longer a significant difference compared to age-matched controls of group 2. CONCLUSIONS:cIB is a non-invasive tool allowing quantitative monitoring of CAVD progression and regression in a rat model of reversible renal failure, as validated by comparison with histology. This technique might become useful for assessing CAVD during targeted therapy.

journal_name

Cardiovasc Ultrasound

journal_title

Cardiovascular ultrasound

authors

Roosens B,Bala G,Gillis K,Remory I,Droogmans S,Somja J,Delvenne E,De Nayer J,Schiettecatte J,Delvenne P,Lancellotti P,Van Camp G,Cosyns B

doi

10.1186/1476-7120-11-4

subject

Has Abstract

pub_date

2013-01-26 00:00:00

pages

4

issn

1476-7120

pii

1476-7120-11-4

journal_volume

11

pub_type

杂志文章

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