Right Atrium – Anatomy, Definition, and Important Terms

The right atrium is the upper chamber of the heart that receives oxygen-free blood from the body via the vena cava pumps into the ventricle.

Researched explanation on what is the right atrium:-

The heart has particularly two atria and two ventricles for the entry and exit of blood. The oxygen-rich blood enters the right atrium through the inferior and superior vena cava.

The right part of the heart pumps this toxic oxygen around the lungs into the pulmonary arteries. There, fresh oxygen enters the bloodstream, and blood moves to the left side of the heart pumped to the rest of the body.

  • There is a big difference between a developing fetal heart and a fully mature adult. A fetus will have a hole in the right atrium that allows blood to flow directly through the left atrium.
  • It is important for the communication health of a fetus. While in the womb, the fetus draws oxygen-rich blood from its mother.

We define the right atrium-

The right chamber includes the Sinoatrial (SA) hub, the pacemaker of the heart. This vital piece of tissue regulates its rhythm and works to shrink other heart muscle cells.

Autonomic veins connect the brain to the SA node to increase or decrease the heart rate to maintain blood pressure, oxygen, and carbon dioxide homeostasis.

Are there any symptoms in the right atrium? – Barely

Idiopathic growth of the right chamber (IRA) is an extreme irregularity.

Approximately one-half (48%) of patients with congenital enlargement of the right atrium has no symptoms. But when they occur, the symptoms include

  • Shortness of breath (28%), 
  • Palpitation (17%), 
  • Arrhythmia (12%), 
  • In rare cases, right heart failure and extreme fatigue. 
  • Related case study

We report the case of a young man with an inadvertently enlarged right atrium. The patient experienced a privileged atrial split and meticulous disease of the chamber, creating an atrial office of general safety and size.

The atrial without massive fibrosis had smooth and homogeneous wall thickness that confirms the diagnosis of an idiopathic enlargement of the right atrium.

Analysis of what is the function of the right atrium:-

The right atrium is responsible for receiving oxygen-free blood from the body via the vena cava and pumping it into the right ventricle, sent to the lungs, for oxygenation.

Oxygen-rich blood (arterial blood) travels through the aorta to organs and tissues in the body, arteries and further divides into smaller branches and capillaries.

  • Carbon dioxide enriches the return of blood to the heart through the veins that converts it to oxygen. Thus, the right atrium is known as the station pre-arrival of the deoxygenated blood.
  • In addition to being the first structure to receive blood returning from the body, it also contains the sinoatrial node (SA). It triggers electrical impulses that coordinate the heartbeat and regulate its rhythm as well as induce other heart muscle cells to contract.
  • The AV node takes the signal from the sinoatrial node (SA), slows down, controls it, and finally sends an electrical impulse from the atria to the ventricle. It helps maintain heart rate to maintain blood pressure, oxygen, and carbon dioxide levels.
  • Not only is the right atrial function of the primary heart rhythm, but it is also a feature in the area of ​​​​the abnormal rhythm. One way or another majority of cardiac electrophysiology procedures are likely to involve the right atrium.

Some important functional parts-

Rt atrium:

The main vessels entering the RT atrium are the superior vena cava and the inferior vena cava that bring blood back from the systemic circulation to the heart.

Besides, entering the right atrium is also the coronary sinus, which causes a venous return from the coronary arteries. Finally, entering the right atrium is the venae cordis minimae.

Heart right atrium:

The right atrium is the first chamber of the heart that comes in contact with blood as it returns from the systemic circulation and travels through the blood supply. The blood entering this chamber is deoxygenated.

Right atrial :

There is evidence of fetal development in the right atrial, in the shape of fossa ovalis, and callus ovaries. Both these structures lie on the atrial septum, separating the left and right oria.

Aulus ovalis forms the upper margin of the fossa, while the floor of the fossa represents the persistent septum primate of the fetal heart. The anus is the lower edge of the septum.