Int heart Flashcards
what is attached to the sup + inf border of the fibrous skeleton
sup- atrial myocardium is attached to sup
inf- ventricular myocardium is attached to inf
what is the function of the fibrous skeleton
acts as a electrical insulator so n inn can get to AV bundle
which fibrous ring is attachment for tricuspid and bicuspid valve
R fibrous ring- tricuspid valve
L fibrous ring- bicuspid valve
which coronet is attachment for aortic and pulmonary valve
R- aortic
L-pulmonary
Where is the sinus vernarum found and feature of it
region of the right atrium that recieves venous blood returning (very smooth)
where are pectinate muscles usually found
main featire of right atrium (starts at crisa terminalis- seperates smooth and rough parts, SA node here)
where is the oval fossa found and what was it
found in right atrium (during development it was an opening to oval foramen)
what valve is in the right ventricle
tricuspid (papillary muscle attaches to each, 3 total)
what is trabecula carne a feature of
Right+ left ventricle
where is the septomarginal trabecula and what is its function
only in right ventrical
-joins septal wall + ant wall to alllow nerve signals to travel faster
what is the supraventricular crest and what valve is located above it
everything above leads to pulmonary trunk (outflow part of r ventricle), semilunar valve is located here
how many openings does the left atrium have and what surface are they on
4 oppenings for pulmonary veins (ox blood) on post surface
What is the valve betweeen L atrium + vent
Bicuspid (mitril) valve
Where is the aortic vestibule found and what does it lead to
smooth part of left ventrical, leads to aortic orifice (outflow of l verntrical)
if there is a rupture of a tendinous cord/ insuficiency in papilary mm what could happen
valvular prolapse
what do the semilunar valves close off
Pulmoary valve- (ant, r, + L)
+
Aortic valve- (post, r +L)
what prevents the backflow of blood thru the valves
When the blood goes backward the cusps open and the nodules secure the central most part of the orifice
what is the origin of the coronary sinus and how does blood get into it
Right and left aortic sinus are origins of coronary artieries and during diastolie a volume of blood enters both R and L coronary arterties
where can u ausculate the pulmonary valve
level of 2nd intercostal space (left)
Where can u ausculate aortic valve
level of 2nd intercostal space (right)
where can u ausculate mitral valve
level of 5th intercostal space (left)
where can u ausculate tricuspid valve
level of 5th intercostal space (parasternally)
