Cardio Flashcards
Most anterior chamber of the heart
Right ventricle
Heart chamber that is subcarinal and midline in the thorax; supplied by the right and left superior and inferior pulmonary veins
Left atrium
Forms the right border of the cardiac silhouette in the frontal projection
Right atrium, superior and inferior vena cava
Forms the left border of the heart on frontal projection
Pulmonary artery, Aortopulmonary window, aortic knob, left atrial appendage, left ventricle
On the lateral projection:
A. Border forming anterior adjacent to the sternum
B. Border forming in the high posterior subcarinal region
C. Border forming inferiorly and posteriorly
A. Right ventricle
B. Left atrium
C. Left ventricle
2 portions of the right atrium
- smooth POSTERIOR wall (from sinus venosus)
2. Trabeculated ANTERIOR wall (from embryonic right atrium)
A muscular ridge that runs from the mouth of the SVC and fades inferiorly to the mouth of the IVC
-divides the 2 portions of the right atrium
Crista terminalis
Divides the medial or posterior wall of the right atrium
Interatrial septum
*contains the FOSSA OVALIS(smooth central dimpled area)
2 portions of the right ventricle
- Inflow or sinus portion
2. Outflow tract or pulmonary conus
Divides the 2 portions of the right ventricle
Crista supraventricularis
*a muscular ridge with a septal band called MODERATOR BAND
The smooth cephalic portion of the right ventricle that leads to the pulmonary trunk
Infundibulum (conus arteriosus)
Right pulmonary artery exits the right hilum as the ____ and ____
Truncus anterior, interlobar arteries
Left mainstem bronchus lies BELOW the pulmonary artery
HYPARTERIAL
Right bronchus lie next to the right pulmonary artery
EPARTERIAL
Remnant of the ductus arteriosus, which closes functionally in the first 24 hours and closes anatomically by 10 days
-arises from the superior proximal left PA and crosses thru the aorticopulmonary window to the floor of the aorta
Ligamentum arteriosum
Highest and most posterior cardiac chamber
Left atrium
Strong fibrous chords that extend from the mitral leaflets to the papillary muscles of the left ventricle
Chordae tendinae
Reservoirs created by the closure of the aortic valve and from which the right and left coronary arteries arise
Sinuses of valsalva
The aorta gives off the _____
Right innominate artery, left common carotid artery, left subclavian artery
- specialized neuromuscular tissue
- approx.5 to 20 mm
- located on the anterior endocardial surface of the right atrium just above the SVC and right atrial appendage junction, near the crista terminalis
Sinoatrial node
2x5mm region of neuromuscular tissue at the endocardial surface, along the right side of the interstitial septum, just inferior to the ostium of the coronary sinus
Atrioventicular node
20mm long tract which extends down the right side of the membranous interventricular septum
Bundle of HIS
…first to activate (conduction system)
Anterior or septal right ventricle
…last to activate (conduction system)
Posterior or basal left ventricle
