lecture 6 - cardiac anatomy slides
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Introduction to RadiologicIntroduction to Radiologic Anatomy of the
Cardiovascular system
Department of Radiology,p gy,Vancouver General Hospital
Dr. Darra MurphyChest Imaging Fellow
Learning Objectives
Be able to identify the following cardiac structures on Chest CT:
P i di l• Pericardial sac• External Cardiac borders, cardiac chambers, valves, muscles:
o Right atrium and right atrial appendageo Right ventriclego Left atrium and left atrial appendageo Left ventricle
• Coronary vessels Right coronary arteryo Right coronary artery
– Posterior descending branch o Left coronary artery
– Circumflex branch– Left anterior descending branch
o Coronary sinus
Learning Objectives
Be able to identify the following cardiac structures on Chest CT:
• Heart valveso Tricuspid valveo Pulmonary valveo Mitral valveo Aortic valve
Cardiovascular System
Knowledge of the borders of the heart help to locate individual structures
• Left heart border: aortic knuckle, aorto-pulmonary window, left atrial appendage, left ventricle
• Right heart border: SVC, right atriumatrium
• Inferior heart border: right ventricle in contact with diaphragmdiaphragm
Basic Anatomy
Left Atrium
Heart Chambers
Looking at the Hila
• Comprised of lobar bronchi,
central/lobar pulmonary arteriescentral/lobar pulmonary arteries,
veins, lymph nodes
• The left hilum is slightly higher
than the right in normal
individuals
• Maybe enlarged by arteries,
masses or enlarged lymph
dnodes
Cardiovascular System Sagittal view
Aortic Arch
Left Pulmonary Veins
Right Ventricle Left Pulmonary Arteries
Left Ventricle
Heart borders (anterior)
A ti t P l t
Superior vena cava
Aortic root Pulmonary artery
Right atrium
Left ventricle
Right ventricle
Left ventricle
Heart borders (right lateral)
Aortic root
Right atriumRight atrial appendage
Right ventricleg
Heart borders (left lateral)
Left atriumLeft atrium
Left ventricle
Diaphragmatic surface of the heart
Right atriumLeft atrium
Posterior i t t i linterventricular
sulcus
Right ventricleLeft ventricle PDA
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Radiology Anatomy of the Upper Thorax - Axial View
8
27
5
6 4
3
5
1. Sternum2. Arch of the Aorta3. Humerus
6. Trachea7. Azygous Vein8. Superior Vena Cava3. Humerus
4. Esophagus5. Vertebral Body
8. Superior Vena Cava9. Pectoralis Muscles
Radiology Anatomy of the Mid Thorax - Axial View
9 1
28
7
3
46
7
5
1. Ascending Aorta2. Pulmonary Trunk
6. Esophagus7. Right Pulmonary Artery2. Pulmonary Trunk
3. Left Pulmonary Artery4. Bronchi5. Descending Aorta
7. Right Pulmonary Artery8. Superior Vena Cava9. Rib
1
Radiology Anatomy of the Lower Thorax - Axial View
3
2
7
5
7
56
44
1. Right Ventricle2 Pericardium
6. Azygous Vein7 Right Atrium2. Pericardium
3. Left Ventricle4. Descending Aorta5. Esophagus
7. Right Atrium
Radiology Anatomy of the ThoraxAxial View
Aortic Valve
Left atriumLeft atrium
Radiology Anatomy of the ThoraxAxial View
Right Atrium
Left inferiorLeft inferior pulmonary vein
Descending Aorta
Radiology Anatomy of the ThoraxAxial View
Right ventricleg
Left VentricleTricuspid Valve
Left Ventricle
coronary sinus
Radiology Anatomy of the ThoraxAxial View
Moderator Band
Left Ventricle
Radiology Anatomy of the ThoraxCoronal View
Aorta
Pulmonary ArteryAscending
Aorta
Left Ventricle
Right Ventricle
Radiology Anatomy of the ThoraxCoronal View
Trachea
Right Pulmonary Artery
Left Pulmonary Artery
Left Ventricle
y
2 layers of pericardial sac:1. Fibrous pericardium (OUTER)2. Serous pericardium (INNER)
I parietal pericardium (fused to fibrous pericardium)I. parietal pericardium (fused to fibrous pericardium)II. visceral pericardium (part of the epicardium)
Normal Pericardium
Pericardial Effusion
YELLOW arrows outline the parietal andYELLOW arrows outline the parietal and visceral layers of the pericardium
Cardiac Valves
Cardiac Valves
Valvular Anatomy: Tricuspid Valve
• Separates right atrium and ventricle
• Consists of three leaflets o Leaflets are attached by chordae tendinae to papillary muscles to keep valves
closed during systole
Valvular Anatomy: Tricuspid Valve
Valvular Anatomy: Pulmonary Valve
• Separates the right ventricular outflow tract and pulmonary trunk
• Consists of three semilunar cusps
Valvular Anatomy: Pulmonary Valve
Valvular Anatomy: Mitral Valve
• Separates left atrium and ventricle
• Consists of two leafletso Leaflets are attached by chordae tendinae to papillary muscles to keep
valves closed during systole
Mitral valve
Tricuspid + Mitral valves
Mitral valve in fibrous continuity with the aortic valve
Valvular Anatomy: Aortic Valve
• Separates left ventricular outflow tract from ascending aorta
C i t f th il• Consists of three semilunarcusps
• Right and left coronary arteries• Right and left coronary arteries originate from the right and left aortic sinuses
Valvular Anatomy: Aortic Valve
Origin of left Coronary Artery
Coronary Circulation
Arterial blood supply to the myocardium arises from two coronary arteriesArterial blood supply to the myocardium arises from two coronary arteries• Coronary arteries arise from the sinuses of the aortic valve • Encircle the heart and branches converge towards the apex
Volume rendered – heart (anterior)
A ti tAortic root
Right coronary arteryLeft anterior descending
coronary arteryRight coronary artery y y
Volume rendered – lateral
Aortic root
Right coronaryRight coronary artery
Left anterior descending
coronary artery
Volume rendered - Left lateral
Left Circumflex
LAD coronary artery
Volume rendered - posterior
Posterior descending artery
Left Anterior Descending Artery Occlusion
Right Coronary Artery
• Arises from the aortic sinus of the right aortic valve
• Courses anteriorly and descends between right atrium and ventricle along the A- V groove and bifurcates at the crux into the PDA and PL - right dominance 85% of people85% of people
RCA
Right coronary artery
Left Coronary Artery
• Left main coronary artery arises from the sinus of the left aortic valve
Co rses posterior to p lmonar tr nk and di ides into t o branches• Courses posterior to pulmonary trunk and divides into two brancheso Left anterior descending artery: descends towards apexo Circumflex artery: turns towards posterior surface
Origins of coronary arteries
Right coronary artery
Ascending aorta
Left main coronary artery
Left coronary artery branches
Left main coronary Left anterior
descending arteryartery
Circumflex arteryy
Left coronary artery branches
Circumflex artery
Left coronary artery branches
Left anterior descending artery
TracheaTrachea
Superior vena cava
Aortic archcava
Left main bronchusRight main bronchus
Aortopulmonary window
Left hilumRight hilum
Pulmonary trunk
Left
Right atrium
Left atrial appendage
ventricle
RightRight hemidiaphragm
Costophrenic angle
Right ventricle
TracheaTracheaTracheaTrachea
Superior vena cavaSuperior vena cava
Aortic archAortic arch
L ftL ft
Left main bronchusLeft main bronchusRight main bronchusRight main bronchus
Aortopulmonary windowAortopulmonary window
Left hilumLeft hilumRight
hilumRight hilum
Pulmonary trunkPulmonary trunk
Left Left
Right atriumRight atrium
Left atrial appendageLeft atrial appendage
ventricleventricle
Right Right Costophrenic Costophrenic hemidiaphragmhemidiaphragm
pangle
pangle
Right ventricleRight ventricle
Right upper lobe bronchus
SternumLeft main
lobe bronchus
Th i
Left upper lobe
pulmonary arteryThoracic aorta
Right mainpulmonary artery
bronchus
Left atrium
pulmonary artery
Pulmonary trunk
Left ventricle
Right ventricle
Inferior vena
Vertebral body
cava
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