Right auricular appendix
Encyclopedia
The right atrial appendage (RAA) (right auricular appendix, right auricula, right auricle) is a small conical muscular pouch attached to the right atrium
of the heart
.
.
The right auricle, along with the right atrial body, is lined with pectinate muscles that form a network of hills and furrows that give it a trabeculated surface.
.
to emerge from this structure.
Rupture is rare.
Right atrium
The right atrium is one of four chambers in the hearts of mammals and archosaurs...
of the heart
Heart
The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
.
Anatomy
Its margins present a dentated edge. It projects from the upper and front part of the sinus forward and toward the left side, overlapping the root of the aortaAorta
The aorta is the largest artery in the body, originating from the left ventricle of the heart and extending down to the abdomen, where it branches off into two smaller arteries...
.
The right auricle, along with the right atrial body, is lined with pectinate muscles that form a network of hills and furrows that give it a trabeculated surface.
Terminology
In older texts, the term "right auricle" was often used to describe the structure now known as the right atriumRight atrium
The right atrium is one of four chambers in the hearts of mammals and archosaurs...
.
Clinical significance
It is possible for tachycardiaTachycardia
Tachycardia comes from the Greek words tachys and kardia . Tachycardia typically refers to a heart rate that exceeds the normal range for a resting heart rate...
to emerge from this structure.
Rupture is rare.