Valves – Heart (Cor)

by Craig Canby, PhD

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    00:00 Now the valves of the heart the cardiac valves. We have valves that are located between the atria and the ventricles. We'll also have valves, as we'll see in the next slide, between the ventricles and the great arteries that issue from the ventricles.

    00:20 But I'll stop here. Our focus here is on the two valves between the atria and the ventricles.

    00:28 This is the right atrioventricular valve here. It has three cusps: one, two, three. Hence another name for this valve is the tricuspid valve. And we can name these cusps. And when we name them, we'll have an anterior cusp, a posterior cusp and then a septal cusp as it lies towards the interventricular septum separating the right ventricle from the left ventricle.

    01:02 Over here, we have the left atrioventricular valve between the left atrium and the left ventricle. It has two additional names. One of those is bicuspid ' because we have two cusps: an anterior cusp and a posterior cusp. And a third name that's attached to this particular valve is mitral. And the medical lexicon tends to use mitral more commonly.

    01:36 Now let's take a look at the valves that are between the ventricles and the great arteries that issue from them.

    01:44 Here we can see the two valves at this level and this level. If we start here with the valve set that's most anterior, here we're looking at the valve located between the right ventricle and the pulmonary trunk leaving the right ventricle. So this is receiving blood that will be delivered to the lungs.

    02:10 The pulmonic valve or semilunar valve has three cusps and they're named: this is the anterior one, here's the right one and here's the left one. So the right and left lie more posterior than the anterior. And then if we look here, this profile is demonstrating the valve that exist between the left ventricle and the aorta. This is the aortic semilunar valve. And it has three cusps which can be named: this is the right one, this is the left one and this one is the posterior one.

    02:56 What we cannot appreciate in this view is that the right and left cusps right above them, there will be orifices or ostia that will lead to the coronary arteries. So the right coronary artery would issue right above this planar section, the left right above this planar section. So these are coronary cusps. And the one behind here or posterior does not issue a coronary artery. So it's a non-coronary-related cusp. So that leads

    About the Lecture

    The lecture Valves – Heart (Cor) by Craig Canby, PhD is from the course Thoracic Viscera.

    Included Quiz Questions

    1. 3
    2. 1
    3. 2
    4. 4
    5. 5
    1. Right, left, and posterior
    2. Anterior, posterior, and dorsal
    3. Right, left, and anterior
    4. Lateral, medial, and posterior
    5. Anterior, posterior, and septal
    1. Aortic valve
    2. Pulmonic valve
    3. Right tricuspid valve
    4. Left bicuspid valve
    5. Mitral valve

    Author of lecture Valves – Heart (Cor)

     Craig Canby, PhD

    Craig Canby, PhD

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