Name: assessment of cardiac morphological and functional changes in mouse model of transverse aortic constriction by echocardiographic imaging
Uploaded: 2016-06-21T14:00:00
Description: Watch this Scientific Journal Video about Assessment of Cardiac Morphological and Functional Changes in Mouse Model of Transverse Aortic Constriction by Echocardiographic Imaging at JoVE.com

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Het protocol volgt de richtlijnen van de Institutional Animal Care en gebruik Comite van de University of Washington. 1. Chirurgische Procedure en Voorbereiding voor Imaging <ol><li> Betreft C57BL / 6 muizen TAC of sham operatie zoals eerder beschreven 10. </li><li> Een week na TAC gevarieerde ingrepen verdoven de muis in de inductie kamer met 2% isofluraan gemengd met 1 l / min O 2. Bevestig de juiste verdoving door ongevoeligheid tot teen of staart knijpen. Gebruik ...

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Echocardiografie is op grote schaal gebruikt om de hartfunctie in knaagdier modellen van hart-en vaatziekten 2,6 beoordelen. In vergelijking met invasieve of terminal methodieken zoals druk-volume lus meting 11 en ex vivo werken hart 12, echocardiografie biedt een krachtige, niet-invasieve tool om lopende cardiale structurele en functionele veranderingen in levende dieren te beoordelen. Betrouwbare gegevens te verkrijgen, is het belangrijk om de lichaamstemperatuur en hartslag b...

Mouse models of heart disease, such as TAC and myocardial infarction (MI), have been proven to be valuable to study disease mechanisms as well as to develop novel therapeutic strategies3. TAC initially induces compensatory hypertrophy, but prolonged pressure overload leads to cardiac dilatation and heart failure4. The tightness of the aortic constriction directly determines the degree of cardiac hypertrophy and its transition to heart failure. Noninvasive and reliable measurement of pressure gradient across the aortic constriction is essential for the success of these studies. Doppler imaging has been used to assess pressure gradient produced by TAC5, which is a noninvasive alternative for catheter-based pressure measurement.
Echocardiography has been widely used to noninvasively measure cardiac morphology as well as systolic and diastolic function in mice6-8. Two-dimensional B-mode imaging is used to detect abnormal movements or structural changes of the heart. One-dimensional M-mode imaging is used for quantification of cardiac dimensions and contractility. Color and PW Doppler imaging has recently been used on rodent ultrasound, which has broad applications for echocardiography, including measurement of flow directionality and velocity, as well as systolic and diastolic performance9. 
Longitudinal real-time monitoring of cardiac function using echocardiography in B-mode, M-mode, color and PW Doppler mode provides comprehensive assessment of cardiac structure and function in mice under physiological and pathological conditions. Here we provide a detailed description of the use of echocardiographic imaging to monitor dynamic cardiac morphological and functional changes in mice following TAC or sham surgery.

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			<td height="41" style="height:41px;width:339px;">Anesthesia equipment</td>
			<td style="width:343px;">Harvard Apparatus, 84 October Hill Road 
			Holliston, MA</td>
			<td style="width:175px;">723015</td>
			<td style="width:167px;"></td>
		</tr>
		<tr height="40">
			<td height="40" style="height:40px;width:339px;">Vevo 2100 Imaging System</td>
			<td style="width:343px;">VisualSonics Inc., 3080 Yonge Street Suite 6100, Box 66, Toronto, Ontario, Canada</td>
			<td style="width:175px;">Vevo 2100</td>
			<td></td>
		</tr>
		<tr height="40">
			<td height="40" style="height:40px;width:339px;">Aquasonic ultrasound gel</td>
			<td style="width:343px;">Parker Laboratories, 286 Eldridge Rd, Fairfield, NJ&#160;</td>
			<td style="width:175px;">03-50</td>
			<td></td>
		</tr>
		<tr height="40">
			<td height="40" style="height:40px;width:339px;">Isoflurane</td>
			<td style="width:343px;">Piramal Healthcare, Inc, 3950 Schelden Circle 
			Bethlehem, PA&#160;</td>
			<td style="width:175px;">NDC 66794-017-25</td>
			<td></td>
		</tr>
		<tr height="40">
			<td height="40" style="height:40px;width:339px;">F/air anesthesia gas filter unit</td>
			<td style="width:343px;">A.M. Bickford, Inc, 12318 Big Tree Rd, Wales Center, NY&#160;</td>
			<td style="width:175px;">80120</td>
			<td></td>
		</tr>
	</tbody>
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assessment of cardiac morphological and functional changes in mouse model of transverse aortic constriction by echocardiographic imaging

Transverse aortic constriction (TAC) in mice has been used as a valuable model to study mechanisms of cardiac hypertrophy and heart failure1. A reliable noninvasive method is essential to assess real-time cardiac morphological and functional changes in animal models of heart disease. Transthoracic echocardiography represents an important tool for noninvasive assessment of cardiac structure and function2. Here we used a high-resolution ultrasound imaging system to monitor myocardial remodeling and heart failure progression over time in a mouse model of TAC. B-mode, M-mode, and Doppler imaging were used to precisely assess cardiac hypertrophy, ventricular dilatation, and functional deterioration in mice following TAC. Color and pulse wave (PW) Doppler imaging was used to noninvasively measure pressure gradient across the aortic constriction created by TAC and to assess transmitral blood flow in mice. Thus transthoracic echocardiographic imaging provides comprehensive noninvasive measurements of cardiac dimensions and function in mouse models of heart disease.

Figuur 1 toont de B-modus beelden van de aortaboog weergave van de muis hart onderworpen aan sham (figuur 1A) of TAC chirurgie (Figuur 1B). De aortaboog, innominate slagader, linker gemeenschappelijke halsslagader, en de linker subclavia worden getoond. Merk op dat de aorta vernauwing is duidelijk zichtbaar in TAC, maar niet sham hart. Color Doppler beelden van aorta-view zijn weergegeven in figuur 2A. De golfvormen van ...

Watch this Scientific Journal Video about Assessment of Cardiac Morphological and Functional Changes in Mouse Model of Transverse Aortic Constriction by Echocardiographic Imaging at JoVE.com

Assessment of Cardiac Morphological and Functional Changes in Mouse Model of Transverse Aortic Constriction by Echocardiographic Imaging

Het doel van dit protocol is om niet-invasief beoordelen cardiale structurele en functionele veranderingen in een muismodel van hart-en vaatziekten door dwarse aorta vernauwing, met behulp van B- en M-mode echocardiografie en kleur / pulse wave Doppler imaging.

Beoordeling van Cardiac morfologische en functionele veranderingen in muismodel van Transversale Aorta Vernauwing door Echocardiografie Imaging

Transverse aortic constriction (TAC) in mice has been used as a valuable model to study mechanisms of cardiac hypertrophy and heart failure1. A reliable ...

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