Name: assessment of cardiac morphological and functional changes in mouse model of transverse aortic constriction by echocardiographic imaging
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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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El protocolo sigue las directrices del Comité para el Cuidado y Uso de Animales Institucional de la Universidad de Washington. 1. Procedimiento Quirúrgico y preparación de la Imagen <ol><li> Asunto C57BL / 6 ratones para TAC o cirugía simulada como se describió previamente 10. </li><li> Una semana después de TAC o cirugía simulada, anestesiar el ratón en la cámara de inducción con 2% de isoflurano mezclado con 1 L / min O 2. Confirmar la anestesia adecuada p...

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La ecocardiografía se ha utilizado ampliamente para evaluar la función cardíaca en modelos de roedores de 2,6 enfermedades del corazón. En comparación con los métodos invasivos o terminales tales como presión-volumen de medición de bucle 11 y ex vivo de trabajo del corazón 12, ecocardiografía proporciona una herramienta poderosa, no invasivo para evaluar los cambios estructurales y funcionales cardíacos en curso en animales vivos. Para obtener datos fiables, es import...

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.

La figura 1 muestra las imágenes en modo B de la vista del arco aórtico del corazón de ratón sometido a tratamiento simulado (Figura 1A) o cirugía TAC (Figura 1B). El arco de la aorta, la arteria innominada, arteria carótida común izquierda y la arteria subclavia izquierda se muestran. Tenga en cuenta que la constricción de la aorta es claramente visible en la TAC, pero no simulado corazón. Las imágenes en color Doppler de vist...

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

El objetivo de este protocolo es evaluar de forma no invasiva los cambios estructurales y funcionales cardiacas en un modelo de ratón de la enfermedad cardíaca creado por constricción de la aorta transversal, utilizando B y en modo M ecocardiografía y color / de pulso Doppler de onda.

Evaluación de la cardíaco morfológica y funcional Los cambios en el modelo de ratón de la constricción de la aorta transversa por ecocardiográfico 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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