RA Flashcards
SVC
Superior Vena Cava
IVC
Inferior Vena Cava
RAA
Right atrial appendage
Overlays aortic root
Pectinate muscle
Pectinate muscle
Parallel ridges in the walls
Resemble teeth of a comb called pectin
Crista Terminalis
Ridge of smooth muscle running down the antero-lateral wall of RA
Where smooth muscle meets with pectinate
Important in genesis of several atrial arrhythmias
Atrial reentry and focal atrial tachycardia (ectopic foci)
Fossa ovalis
An oval shaped depression in the interatrial septum
Eustachian valve
Also known as the IVC valve
Lies at junction of IVC and RA
Eustachian ridge
Continuation of CT
Separates openings of IVC and the CS
Tendon of Todaro
Fibrous structure formed by junction of EV and TV
Thebesian valve
Aka valve of CS
Semicircular fold of the right atrial tissue at CS ostium (CS os)
CS os
Opening between IVC and Tri-cuspid
Inferior aspect of interatrial septum
Pacing lead placement
CS
Opening of coronary sinus vein
Between IVC and Tri
Inferior part of the interatrial septum
RAA
Anterior and medial to RA
Overlays aortic root
Pouch like structure made of pectinate muscle
Pumps blood to RV
CTI
Cavo-tricuspid isthmus
