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47 Cards in this Set
- Front
- Back
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IVC/SVC
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Big veins that return deoxygenated blood back to the heart
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IVC drains...
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trunk and lower extremities
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SVC drains...
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head, neck and upper extremities
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RA=
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Right Atrium
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RA is located:
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right and anterior to the LA
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Three regions of the RA:
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1-Posterier venous component
2-Anterior Region 3-Atrial Ridge |
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Posterier Venous Component
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Includes SVC, Coronary Sinus, and IVC. CS dumps directly into the RA.
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Atrial Ridge:
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Includes the Chiari Network and Eustachian Valve which are fetal reminants.
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Anterior Region:
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Oval vestibule leading to tricuspid valve. AV node is housed here (Triangle of Kotch=where AV Node and Atrial pathway come together)
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The RA receives blood from...
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The Coronary Sinus
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RAA is?
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Right Atrial Appendage, has pectinate muscles
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Coronary Sinus is located
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Between the IVC and Tricuspid Valve
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IAS=
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Interatrial Septum
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IAS Forms:
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On dorsal wall of the RA and the LA lies posterior
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3 segments of the IAS:
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1-Fossa Ovalis (thinnest)
2-Septum Primum 3-Septum Secundum |
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The atrias are divided by the:
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IAS
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TV=
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Tricuspid Valve
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The Tricuspid Valve is a:
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AV Valve
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The Tricuspid Valve is located:
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Between the RA and RV
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How many cusps does the Tricuspid Valve have?
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3
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What are the Tricuspid Valve cusps made of?
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Fibrous tissue
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TV Apparatus consists of:
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Annulus
3 leaflets chordae Papillary Muscles |
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Tricuspid Annulus is the:
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-largest valvular orifice
-made of endothelial tissue |
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Tricuspid Leaflets:
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3 of them
-names based on physical location 1-Anterior Leaflet (smallest, close to ant. wall) 2-Medial or septal leaflet( next to ivs) 3-Inferior or posterior leaflet |
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Tricuspid Valve Chordae:
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Same criteria as MV:
thin, fibrous strong strands. Attached to the papillary muscles. -Helps to facilitate normal closing, so blood doesnt leak. |
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Right Side Papillary Muscles:
2 Major |
Anterior Papillary Muscle (supplies chordae to anterior leaflet)
Posterior (smaller) Septal Leaflet (not major) |
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IVS=
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Interventricular Septum
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What does the IVS do?
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Divides the RV and LV
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2 areas of IVS:
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1-Muscular Region- Inferior (think, largest)
2-Membranous area- Superior (thins out) |
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RV=
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Right Ventricle
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Details about RV:
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Most anterior chamber
crescent/pyramid shape lies directly beneath sternum |
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RV is important bc of :
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Pulmonary Circulation
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3 Regions of the RV:
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1-Inlet( gaurded by TV)
2-Muscular Outlet (Guarded by PV, more trabeculead, right ventricle outflow) 3-Apical (Moderator Band) |
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RV is different from LV due to:
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Shape: Crescent
Walls: thin, 4-5 mm -Pumps blood to lower respitory system -Apex- Heavy trabeculae and moderator band |
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Pulmonic Valve (PV)
(Aortic Valve counter part) |
-A semilunar valve
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Pulmonic Valve is positioned in:
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RVOT
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3 cusps of Pulmonic Valve
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1-Anterior
2-Left (Posterior) 3-Right |
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Lcoation of Pulmonic Valve (PV)
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Sits highest and furthest to the back (SUperior and posterior)
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Job of Main Pulmonary Artery:
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Carries deoxyginated blood to lungs
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Where does the Main Pulmonary Artery begin?
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Just above the pulmonic valve
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Location of Main Pulmonary Artery
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Courses superior and leftward
lies near medial aorta |
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Does the Main Pulmonary Artery bifurcate?
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Yes, into Right and Left PA
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What are the 2 major Coronary Arteries?
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Left Main(Bifurcates)
Right Coronary Artery |
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Coronary veins are responsible for what percentage of return via coronary sinus?
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60%
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4 Coronary Veins:
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1-Great
2-Middle 3-Small 4-Posterior |
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40% of Coronary Veins are:
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Thesbian Veins which goes into RA)
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Conduction System includes:
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Myocites
SA Node Av Node Bundle of His (LBB, RBB) Purkinje Fibers |
