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In the coronary circulation, the posterior descending artery (PDA), also called the posterior interventricular artery (PIV, PIA, or PIVA), is an artery running in the posterior interventricular sulcus to the apex of the heart where it meets with the left anterior descending artery also known as the anterior interventricular artery.
In approximately 33% of individuals, the left coronary artery gives rise to the posterior descending artery [4] which perfuses the posterior and inferior walls of the left ventricle. Sometimes a third branch is formed at the fork between left anterior descending and left circumflex arteries, known as a ramus or intermediate artery .
The circumflex artery arises from the left coronary artery and follows the coronary sulcus to the left. Eventually, it will fuse with the small branches of the right coronary artery. The larger left anterior descending artery (LAD), is the second major branch arising from the left coronary artery. It follows the anterior interventricular sulcus ...
The posterior descending artery, providing blood flow to the infero-posterior wall of the heart, originates from the RCA in 70-90% of individuals (“right coronary dominance”), whereas in 10-15% cases it originates from the LCx (“left coronary dominance”).
In approximately 80% of patients (right dominant), the RCA gives off the posterior descending artery (PDA). In the other 20%, of cases (left dominant or codominant), the PDA arises from the left circumflex artery or is supplied by both the right coronary artery and the left circumflex. [8]
In the other 85% of all cases the posterior interventricular artery comes out of the right coronary artery. [3] When the left circumflex supplies the posterior descending artery in those 15% of cases, it is known as a left dominant circulation.
distal posterolateral branch from the right coronary artery in around 2%. [1] distal right coronary artery in around 10%. [1] right posterior interventricular artery in around 7%. [1] distal circumflex branch of left coronary artery in around 4%. [1] The right coronary artery supplies the atrioventricular node in around 90% of people. [1] [2]
1.1 Right coronary artery. 1.2 Left coronary artery. ... third/fourth perforating artery; Descending genicular artery. ... posterior tibial artery.
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