PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
LAD
|
|
|
right coronary artery
|
|
|
left coronary artery
|
|
|
circumflex artery
|
Detailed explanation-1: -Right coronary artery (RCA). The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes, which regulate the heart rhythm.
Detailed explanation-2: -From the left coronary system, the left anteromedial artery is the one responsible with the sinoatrial node supply; the source is the circumflex artery and its origin is the medial third of the left anterior quadrant.
Detailed explanation-3: -The sinuatrial node receives its arterial blood supply from the sinuatrial nodal branch of the right coronary artery in the majority (60%) of individuals but can also arise from the left coronary artery/circumflex artery in around 40% of individuals.