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Lecture Big Red 05 25 21
Acute Aortic Syndrome 7/6/21
Case Presentations 7/8/21

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 AORTA
The abdominal aorta ids divided into the suprarenal and infra-renal portion
Ashley Davidoff

The Aorta

Aorta and Circulation
The heart and lungs are positioned at the centre of all the organs in the body and they are understandably considered vital organs. Think of yourself as a little red cell within the vast and powerful environment of the circulatory system. Listen and feel the power of the pulse and the rush of all the rivers going back and forth, hither and thither, and around and around ? imagine what goes on inside the system all the time ? it is probably like walking through a rain forest with huge waterfalls, winding rivers and rivulets ? a mixture of gushing power and calm meandering flow- but the colors are reds and blues instead of greens and yellows! Courtesy Ashley Davidoff MD 32059

 

Aorta and Circulation
The heart and lungs are positioned at the centre of all the organs in the body and they are understandably considered vital organs. Think of yourself as a little red cell within the vast and powerful environment of the circulatory system. Listen and feel the power of the pulse and the rush of all the rivers going back and forth, hither and thither, and around and around ? imagine what goes on inside the system all the time ? it is probably like walking through a rain forest with huge waterfalls, winding rivers and rivulets ? a mixture of gushing power and calm meandering flow- but the colors are reds and blues instead of greens and yellows!
Ashley Davidoff MD 32059d01 key words cardiac heart circulation artery vein introduction drawing Davidoff art
Red White and Blue
39533 This image combines the coronal view with the axial view and reflects the intimate relationships that the adrenals have with the kidneys as well as the great vessels of the abdomen. They literally have their fingers on the pulse of the aorta (red overlay)and the inferior vena cava (IVC) (blue overlay)
Ashley Davidoff
keywords
adrenal kidney relations anatomy
End Point of the Arterial Circulation is at the Capillaries and is also the Beginning of the Venous Circulation
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Ashley Davidoff MD
A Simple Tube
72845.800 aorta flow principles structure laminar flow turbulent flow normal
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The aorta is curved in shape and elastic in nature while blood is not a simple fluid and hence special circumstances exist
72831.800 aorta flow principles structure laminar flow turbulent flow normal tube Davidoff Art Courtesy Ashley Davidoff MD 72835.800 72839 72831.800 72845.800 49483
Note the difference in the pressures between the left side of the circulation and the right. The left ventricular pressure reaches a systolic of 120mmHg, while the right atrial pressure is close to zero. This large difference allows blood to flow through the circulation. pressure principles
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key words
heart cardiac LV left ventricle aorta aortic systemic circulation capillary capillaries arterioles venules right atrium RA right ventricle RV normal physiology pressures hemodynamics
Ashley Davidoff
Note the difference in the pressures between the left side of the circulation and the right. The left ventricular pressure reaches a systolic of 120mmHg, while the right atrial pressure is close to zero. This large difference allows blood to flow through the circulation. pressure principles
49483b01 heart cardiac LV left ventricle aorta aortic systemic circulation capillary capillaries arterioles venules right atrium RA right ventricle RV normal physiology pressures hemodynamics Ashley Davidoff
Laminar flow
This diagram reflects the laminar flow showing the almost parallel lines of flow that is characteristic of flow in the smaller tubes. Under resting conditions, laminar flow exists from the medium-sized bronchi onward down to the bronchioles. During exercise, the air flow is accelerated, and laminar flow may be confined only to the very small airways.
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Parabolic Flow ? Highest Velocity in Center and Lowest on the Endothelium
keywords velocity parabolic Laminar flow is the normal condition for blood flow throughout most of the circulatory system. characterized by concentric layers of blood move in parallel down the length of a blood vessel. highest velocity (Vmax) isin the center of the vessel. lowest velocity (V=0) is along the vessel wall. T flow profile is parabolic occurs in long, straight blood vessels, under steady flow conditions. Davidoff art Courtesy Ashley Davidoff MD
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Parabolic Flow ? Highest Velocity in Center and Lowest on the Endothelium
keywords velocity parabolic Laminar flow is the normal condition for blood flow throughout most of the circulatory system. characterized by concentric layers of blood move in parallel down the length of a blood vessel. highest velocity (Vmax) isin the center of the vessel. lowest velocity (V=0) is along the vessel wall. T flow profile is parabolic occurs in long, straight blood vessels, under steady flow conditions. Davidoff art Courtesy Ashley Davidoff MD
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Turbulent flow
This drawing shows the lines and circles of noisy turbulent flow, which is characteristic of flow in the larger airways.
Courtesy of Ashley Davidoff M.D. 42434b07
Histology ? Key to Aortic Function is its Elastic Layer (teal)
The Innermost Layer is the Endothelium and Outermost is the Adventitia
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Ashley Davidoff MD
Histology ? Key to Aortic Function is its Elastic Layer (teal)
The Innermost Layer is the Endothelium and Outermost is the Adventitia
47678.800 Ashley Davidoff MD
The Shape of Big Red
keywords aorta aortic valve sinotubular junction ascending aorta aortic arch brachiocephalic artery left common carotid artery left subclavian artery descending aorta normal TCV
Ashley Davidoff MD
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Candy Cane Shape of the Arch
Key Words
candy cane shape aorta aortic valve sino-tubular junction ascending aorta aortic arch descending aorta normal
Ashley Davidoff
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The Aortic Valve ? 3 cusps thickened at the Edges Forming Commissures and Sinuses and Attached to the Annulus (red)
The aortic valve (AV) lies central to many structures including the right ventricular outflow tract (RVOT), pulmonary valve (PV), left atrium (LA), right atrium (RA), and superior vena cava (SVC). aorta from above. In this diagram, the commissures are overlaid in green, the crescent shaped lunulae reflect the free edge of the leaflets and are overlaid in yellow, and the nodules of Arantii are overlaid in orange. The sinuses of Valsalva are like cups and are positioned between the free edges. (gray)
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Ashley Davidoff MD
Aortic Annulus is attached to the Crux of the Heart  heart cardiac embryology conal septum line drawing right atrium left atrium left ventricle right ventricle interatrial septum interventricular septum atrioventricular septum crux of the heart embryology anatomy
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