What is crista terminalis heart?
The crista terminalis (or terminal ridge) is a ridge of myocardium within the right atrium that extends along the posterolateral wall of the right atrium between the orifice of the superior vena cava to the orifice of the inferior vena cava (IVC).
What is the purpose of crista terminalis?
The crista terminalis acts as another anatomic conduction barrier, similar to the line of conduction block between the two venae cavae required in the animal model.
What is a prominent crista terminalis?
A prominent crista terminalis is a well-defined fibromuscular ridge formed by the junction of the sinus venosus and primitive right atrium (RA) extending along the posterolateral aspect of the right atrial wall, which is a normal anatomic variant and recognized by echocardiography occasionally [1, 2].
What is a Chiari network in right atrium?
The Chiari network, encountered infrequently in the right atrium, is a fenestrated, net-like embryonic remnants of valves of sinus venosus, lying closely in relation to the inferior vena cava and coronary sinus, sometimes connecting these with other right atrial structures [1].
How is crista terminalis formed?
The crista terminalis is a smooth muscular ridge in the superior aspect of the right atrium, formed following resorption of the right valve of the sinus venosus.
Which is situated in upper part of crista terminalis?
The crista terminalis is a vertical ridge of smooth myocardium within the right atrium of the heart. It forms from the superior part of the right venous valve where the sinus venosus enters the right atrium. The sinuatrial node is within the upper part of the crista terminalis.
What is Coumadin Ridge?
The coumadin ridge is a prominent, muscular ridge of tissue that lies in the left atrium in between the left superior pulmonary vein and the left atrial appendage[2]. It may often appear to be attached to the roof of the left atrial appendage, with a rounded end extending into the left atrium[2].
Where does coronary sinus open?
right atrium
The function of the coronary sinus is to drain the venous blood from the majority of the heart. It opens into the right atrium between the opening of inferior vena cava, the fossa ovalis and the right atrioventricular orifice.
What is the difference between Chiari network and Eustachian valve?
the Chiari network will originate from either the Eustachian or Thebesian valve and attach to the upper wall of the RA or the IAS, the Eustachian valve does not, and should not be termed a Chiari network, even if it is mobile and fenestrated. The Chiari network is often considered clin- ically insignificant.
Is sulcus Terminalis the same as crista terminalis?
The terminal sulcus marks the separation of the right atrial pectinate muscles from the sinus venarum. On the internal aspect of the right atrium, corresponding to the terminal sulcus is the crista terminalis. The superior border of the terminal sulcus designates the transverse plane in which the SA node resides.
What is Crista anatomy?
cris·tae (-tē) 1. Anatomy A crest or ridge, as on the top of a bone. 2. Biology One of the inward projections or folds of the inner membrane of a mitochondrion.
Where is the crista terminalis located in the heart?
The crista terminalis is a smooth muscular ridge in the superior aspect of right atrium. It represents the junction between the sinus venosus and the heart. It divides the pectinate muscle origin and the right atrial appendages in the right atrium.
What is the differential diagnosis of the crista terminalis?
The differential diagnosis of the crista terminalis is particularly important, especially the mass in the RA, which is mostly detected by echocardiography except for the clinical manifestations of primary diseases. The tumor, thrombus and vegetation are the common cardial mass.
Can a crista terminalis cause atrial flutter?
The crista terminalis can initiate ectopic atrial beats, especially right atrial tachyarrhythmia, which lead to paroxysmal atrial fibrillation or atrial flutter [ 16 ]. Sanchez-Quintana et al. [ 17] found that two-thirds of focal right atrial tachycardia, in the absence of structure heart disease, arise from the crista terminalis.