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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.
The right marginal arteries perfuse the right ventricle and the posterior descending artery perfuses the left ventricular posterior and inferior walls. There is also the conus artery , which is only present in about 45 percent of the human population, and which provides collateral blood flow to the heart when the left anterior descending artery ...
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.
The artery that supplies the posterior third of the interventricular septum – the posterior descending artery (PDA) [3] determines the coronary dominance. [4] If the posterior descending artery is supplied by the right coronary artery (RCA), then the coronary circulation can be classified as "right-dominant."
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]
The arteries of the upper extremity The subclavian artery; The axilla. The axillary artery; The brachial artery; The radial artery; The ulnar artery; The arteries of the trunk The descending aorta. The thoracic aorta; The abdominal aorta; The common iliac arteries The hypogastric artery; The external iliac artery; The arteries of the lower ...
In fact, despite a certain degree of variability in coronary artery anatomy among individuals, there is greater consistency in the regions of the heart that are supplied by the different coronary arteries. [citation needed] The posterior descending artery, providing blood flow to the infero-posterior wall of the heart, originates from the RCA ...
Anatomy photo:20:09-0106 at the SUNY Downstate Medical Center - "Heart: The Left Coronary Artery and its Branches" Anatomy figure: 20:04-02 at Human Anatomy Online, SUNY Downstate Medical Center - "Posterior view of the heart." "Obtuse marginal artery". Medcyclopaedia. GE. Archived from the original on 2012-02-05. Image at texheartsurgeons.com