10/5 Thorax III Flashcards
two spaces of the right atrium
sinus venarum (smooth walled, fossa ovalis in IA septum) atrium proper (pectinate m)
seperated by the terminal crest (smooth)
internal coating of the right ventricle
trabeculae carne, modified cardiac m
papillary mm
in the ventricles, attached to the AV valves by chordae tendinae (3 in RV, 2 in LV)
moderator band
in right ventricle
helps impulse reach ventricular apecies at the same time, between lower apsect of IV septum and base of anterior papilary m
conus arteriosus
in right ventricle, smooth and leads to opening of pulmonary trunk
features of left atrium
pectinate m near L auricle
valve of foramen ovale in IA septum
features of left ventricle
walls covered in trabeculae carnae
smooth region near SL valve is the aortic vestibule
where to ascultate the aortic valve
2nd R intercostal space
where to ascultate the tricuspid valve
5th L intercostal space right next to sternum
where to ascultate the mitral valve
5th L intercostal space along midclavicular line
where to ascultate the pulmonary valve
2nd L intercostal space
cardiac skeleton
fibrous rings surrounding the aperatures where you find the four valves
when are the AV valves closed
during ventricular systole
when are the SL valves closed
during atrial systole
unique AV valve feature
attachment to papillary mm via chordae tendinae
unique SL valve feature
form pocket-like sinues
where will you ALWAYS find the descending aorta
just anterior to the vertebral body
what does the P wave represent
atrial depolarization and then contraction
what does the QRS wave represent
ventricular depolarization then contraction
what does the T wave represent
repolarization of the heart
what does S1 represent
“LUD”
av valves closing
aligns with R
what does S2 represent
“DUB”
sl valves closing
towards the end of the T wave
what is a patent foramen ovale
incomplete closing of the foramen ovale/fossa ovalis after birth, allows leakage between the R + L atrium
