Cardiovascular system 1. Cardiovascular system – general overview 2. Heart – surface anatomy, external and internal features 3. Cardiac chambers and heart valves 4. Structure of the heart wall 5. Cardiac blood and nerve supply 6. The conducting system of the heart 7. The pericardium 8. Radiological appearance, development and abnormalities of the heart
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Cardiovascular system
1. Cardiovascular system – general overview
2. Heart – surface anatomy, external and internal features
3. Cardiac chambers and heart valves
4. Structure of the heart wall
5. Cardiac blood and nerve supply
6. The conducting system of the heart
7. The pericardium
8. Radiological appearance, development and abnormalities of the heart
Cardiovascular system
2
� Angiology (Gr. ἀγγεῖον, angeīon, „vessel"; и -λογία, -logia)= vascular medicine
� Cardiovascular system:� central organ
– heart
� blood vessels� arteries� capillaries� veins
Circulatory system� Two parts (systems):
� blood-vascular system
� arterial system
� venous system
� lymphatic system
3
Central organ
4
� Heart – cor, (Gr. cardia):
� ‘left (arterial)’ heart
� ‘right (venous)’ heart
� Functional compartments:
� atria – left and right
� chambers – left and right
� Blood circulation:
� systemic circuit
� portal circulation
� pulmonary circuit
5
� Blood flow (circulation)
� Blood vessels, vasa sanguinea:
� arteries, arteriae
� arterial system
� capillaries
�microcirculatory compartment
� veins, venae
� venous system
� Collateral circulation
Blood-vascular system
6
Arterial system� Arterial tree, Gr. ἀρτηρία (artēria); αήρ, air (Galen)
� principle of divergence
� “arterial tree”
� arterial branches – monotomous
and dichotomous branching
o collateral arteries, vas collaterale
o terminal branches vs. end-arteries
� anastomoses, vas anastomoticum
� intrasystemic and intersystemic
� arteriovenous anastomoses (shunts)
o anastomosis arteriovenosa simplex
o anastomosis arteriovenosa glomeruloformis
o obturator arteries
7
Microcirculatory compartment
� Microcirculation:
� material exchange
� anastomoses� end (terminal) arteries
� Microcirculatory bed:
� precapillary (terminal)
arterioles – 30-50 µm � metarterioles
� capillaries
� venules:
� postcapillary – 8-30 µm
� collecting
� Capillaries:
� anastomoses – capillary networks
� transcapillary vs.
� juxtacapillary route(arteriole-venule shunt)
8
Venous system� Venous bed:
� principle of convergence � tributaries(excl. portal venous system)
� have thinner wall and valves
� low blood pressure and flow� “store” blood – 3 l. blood available
� larger number and more anastomoses� venous networks and plexuses
� superficial and deep veins
Heart – topography
9
� Location – asymmetric position
� in middle mediastinum
� upon centrum tendineum
� Somatotopy:
� lateral – pericardium and
mediastinal pleura
� at the front – sternum and
IV-VIth rib cartilage
� at the back – esophagus and thoracic aorta
Cardiac surface anatomy
10
Heart – external surface
� External morphology:
� shape – an irregular cone
� weight – ~300 g (♂); 220 g (♀)
� size:
� longitudinal – 10-12 cm
� transverse – 9-10.5 cm
� anterior-posterior – 6-7 cm
� Cavities – four chambers:
� two atria – left and right
� two chambers – left and right
11
Cardiac chambers� The right atrium, atrium dextrum:
� auricula dextra with mm. pectinati
� v. cava superior et v. cava inferior
� tuberculum intervenosum
� valvula v. cavae inferioris
� ostium et valvula sinus coronarii cordis
� foramina venarum minimarum (Thebesii)
� septum interatriale with fossa ovalis
12
Cardiac chambers
13
� The right ventricle, ventriculus dexter:
� the outflow tract – conus arteriosus
� ostium trunci pulmonalis;
valva trunci pulmonalis
� inflow tract – body, corpus �
ostium atrioventriculare dextrum;
valva antrioventricularis dextra
� trabeculae carneae
� trabecula septomarginalis (da Vinci)
– right A-V bundle (of His)
� crista supraventricularis
� septum interventriculare
Cardiac chambers
� The left atrium, atrium sinistrum:
� auricula sinistra with mm. pectinati
� vv. pulmonales
� septum interatriale with fossa ovalis
14
Cardiac chambers
� The left ventricle, ventriculus sinister:
� an outflow orifice and tract �
ostium aortae with valva aortae
� an inflow orifice and tract �
ostium atrioventriculare sinistrum;
valva antrioventricularis sinistra
15
Heart valves
� Right atrioventricular (tricuspid) valve, valva antricularis dextra s. valva tricuspidalis:
� cuspis anterior,
posterior et septalis
� chordae tendineae
� mm. papillaris anterior,
posterior et septalis
16
Heart valves
� Pulmonary valve, valva trunci pulmonalis:
� valvula semilunaris anterior,
dextra et sinistra
� lunula et nodulus
valvulae semilunaris
17
Heart valves
18
� Left atrioventricular (bicuspid, mitral) valve, valva antricularis sinsitra s. valva bicuspidalis (mitralis):
� cuspis anterior et posterior
� chordae tendineae
� mm. papillaris anterior et posterior
� trabeculae carneae
Heart valves
� Aortic valve, valva aortae:
� valvula semilunaris
posterior, dextra et sinistra
� lunula et nodulus
valvulae semilunaris
� sinus aortae (Valsalva)
19
Heart valves
20
� Function and biomechanics:
� diastole
� systole
Structure of the heart wall� internal layer, endocardium: