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<p><b>New page</b></p><div>[[File:Gray498.png|Gray498|thumb]] '''Right atrioventricular orifice'''<br />
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The '''right atrioventricular orifice''' is an anatomical feature of the [[heart]] that plays a crucial role in the [[circulatory system]]. It is the opening between the [[right atrium]] and the [[right ventricle]], allowing blood to flow from the atrium to the ventricle. This orifice is regulated by the [[tricuspid valve]], which ensures unidirectional blood flow and prevents backflow during the cardiac cycle.<br />
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==Anatomy==<br />
The right atrioventricular orifice is located in the [[right atrium]] of the heart. It is bordered by the [[tricuspid valve]], which consists of three cusps: the anterior, posterior, and septal cusps. These cusps are attached to the [[chordae tendineae]], which in turn are anchored to the [[papillary muscles]] in the right ventricle. The proper functioning of this orifice and its associated structures is essential for maintaining efficient blood flow through the heart.<br />
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==Function==<br />
The primary function of the right atrioventricular orifice is to facilitate the passage of deoxygenated blood from the right atrium to the right ventricle. During [[diastole]], the tricuspid valve opens, allowing blood to flow into the right ventricle. During [[systole]], the tricuspid valve closes to prevent the backflow of blood into the right atrium as the right ventricle contracts and pumps blood into the [[pulmonary artery]].<br />
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==Clinical Significance==<br />
Dysfunction of the right atrioventricular orifice can lead to various [[cardiovascular diseases]]. Conditions such as [[tricuspid valve stenosis]] or [[tricuspid valve regurgitation]] can impair the function of this orifice, leading to symptoms such as [[edema]], [[ascites]], and [[fatigue]]. Diagnosis and treatment of these conditions often involve [[echocardiography]], [[cardiac catheterization]], and surgical interventions like [[valve repair]] or [[valve replacement]].<br />
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==Related Pages==<br />
* [[Heart]]<br />
* [[Right atrium]]<br />
* [[Right ventricle]]<br />
* [[Tricuspid valve]]<br />
* [[Circulatory system]]<br />
* [[Cardiovascular diseases]]<br />
* [[Echocardiography]]<br />
* [[Cardiac catheterization]]<br />
* [[Valve repair]]<br />
* [[Valve replacement]]<br />
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[[Category:Cardiology]]<br />
[[Category:Anatomy]]<br />
[[Category:Cardiovascular physiology]]<br />
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