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Anatomy of the Heart: Difference between revisions
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==Position of the heart== | ==Position of the heart== | ||
[[Image:Figure 2. | [[Image:Figure 2.svg|300px|left|thumb|'''Figure 2.'''<br> | ||
The long axis of the heart is at an angle to the long axis of the body. Approximately a third of the heart is to the right of the midline of the sternum and the remainder is to the left of the midline. | The long axis of the heart is at an angle to the long axis of the body. Approximately a third of the heart is to the right of the midline of the sternum and the remainder is to the left of the midline. | ||
]] | ]] | ||
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<br>'''B.''' The obtuse and acute margins of the ventricles are demonstrated in this apical view.]] | <br>'''B.''' The obtuse and acute margins of the ventricles are demonstrated in this apical view.]] | ||
[[Image:Figure 3. | [[Image:Figure 3.svg|thumb|300px|left|'''Figure 3.'''<br> | ||
'''A.''' Viewed from the front, the right atrium and right ventricle overlaps the left atrium and left ventricle. The atrial chambers are to the right of their respective ventricular chambers. | '''A.''' Viewed from the front, the right atrium and right ventricle overlaps the left atrium and left ventricle. The atrial chambers are to the right of their respective ventricular chambers. | ||
<br>'''B.''' The four cardiac valves are at different levels and different planes with the pulmonary(P) valve situated the most cephalad. The aortic(A) valve is wedged between the tricuspid(T) and mitral(M) valves.]] | <br>'''B.''' The four cardiac valves are at different levels and different planes with the pulmonary(P) valve situated the most cephalad. The aortic(A) valve is wedged between the tricuspid(T) and mitral(M) valves.]] | ||
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==The coronary circulation== | ==The coronary circulation== | ||
[[Image:Figure 9. | [[Image:Figure 9.svg|thumb|300px|right|'''Figure 9.'''<br> | ||
Diagram showing the right (RCA) and left (LCA) coronary arteries and their main ventricular branches. The left anterior descending (LAD) and posterior descending (PDA) coronary arteries mark the anterior and posterior margins of the ventricular septum.]] | Diagram showing the right (RCA) and left (LCA) coronary arteries and their main ventricular branches. The left anterior descending (LAD) and posterior descending (PDA) coronary arteries mark the anterior and posterior margins of the ventricular septum.]] | ||
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==The cardiac conduction system== | ==The cardiac conduction system== | ||
[[Image:Figure 10. | [[Image:Figure 10.svg|thumb|300px|right|'''Figure 10.'''<br> | ||
The cardiac conduction system. Normally, the insulating fibro-fatty tissue plane at the atrioventricular junction prevents atrial myocardium from contacting ventricular myocardium. The penetrating bundle is the only muscular bridge.]] | The cardiac conduction system. Normally, the insulating fibro-fatty tissue plane at the atrioventricular junction prevents atrial myocardium from contacting ventricular myocardium. The penetrating bundle is the only muscular bridge.]] | ||