Heart Flashcards
Valves of R atrium
Coronary sinus, SVC, IVC, fossa ovalis, R AV valve
Location of SA node
in atrial wall at junction of SVC and sulcus terminalis
Location of AV node
in interatrial septum next to opening of coronary sinus and septal leaf of tricuspid valve
3 heart sulci
terminalis, atrioventricular, interventricular
Location of AV bundle
passing inferior to membranous part of IV septum and dividing on muscular septum to R and L bundle branches
vessels entering/exitin R atrium
IVC,SVC,coronary sinus/tricuspid (foramen ovale)
Valve cusps of bicuspid
ant + post
valve cusps of tricuspid
ant + post + septal
smooth and rough walled part of R atrium
smooth - sinus venarum
rough - pectinate muscles
bloodflow divider in R ventricle
supraventricular crest
exit region of R ventricle
infundibulum
portion of heart conducting though R ventricle
moderator band
entrance from L vent to aorta
vestibule
functions of fibrous heart tissue
sep electrically active tissue, give attachments for muscles
diastole vs systole
relaxed vs pump
cusps from which the cor arteries arise
R cor - R cusp
L cor - L cusp
Branches of R coronary art
nodal, R marginal, posterior interventricular
branches of L coronary art
circumflex, LAD
blood source to SA and AV nodes
SA - R coronary> nodal
AV - R coronary > posterior interventricular (anastamoses with LAD)
contraction rate of atrial vs vent. muscle cells
artial much faster
path of AV bundle
inferior to membranous portion of intervent septum and branching as muscular septum - into moderator band on R side
Parasymp innervation of heart
vagus>cardiac branches>cardiac plexus>synapes to heart
symp innervation to heart
T1-4 postgang fibres>asc to cerv ganglia>leave though cardiac nerves passing through cardiac plexus
