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Normal Variants |
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Chiari network (Hans Chiari, 1851–1916, Austrian pathologist), a right atrial embryonic remnant consisting of a membrane extending from the region of the ostia of the inferior vena cava and coronary sinus to the atrial septum and tricuspid annulus. It is depicted as a normal variant on echocardiography in less than 5% of subjects and has sometimes been misinterpreted as a thrombus, vegetation or tumour in the right atrium. Portions of the network may also be depicted on MRI. Eustachian Valve Valve of inferior vena cava. Description: Obsolete term for the Valvula venae cavae inferiore, an endocardial fold extending from the anterior inferior margin of the inferior vena cava to the anterior part of the limbus fossa ovalis. Moderator Band The moderator band is a prominent muscle bundle which crosses from the septomarginal trabeculation to the anterior papillary muscle and then to the parietal wall. Sigmoid Septum Symmetrical or asymmetrical thickening of the interventricular septum and left ventricular free wall results in a left ventricular cavity that is normal or reduced in size, impedance to systolic outflow, and impairment of diastolic filling. (2,3) The mitral valve touches the thickened interventricular septum and blocks outflow Valsalva The 3 sinuses of Valsalva are located in the most proximal portion of the aorta, just above the cusps of the aortic valve. The sinuses correspond to the individual cusps of the aortic valve. These structures contained within the pericardium are easily revealed using aortography and echocardiography as distinct, but subtle, out-pouchings of the aortic wall just above the valve. The sinuses end in the area of the sinotubular junction, and the tubular portion of the aorta begins here. False Tendons
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