Blood Vessels of the Heart

Question 1

Ascending Aorta Brances: Coronary Arteries

Answer 1

• Right Coronary Artery
• Branch off the ascending aorta right/left cornary artery will branch off and get the first crack of oxygenated blood
  
  • Supplies the right atrium and right ventricle
  • Wrap towards to coronary sulcu
• Right Marginal Artery - edge of the right side of heart
  
  • Supplies right ventricle and apex
• Left Coronary Artery - as soon as it comes off the ascending aorta, it brances into the left anterior descending and left circumflex
• Left Circumflex Artery - run arounds the left side in the coronary sulcus all the way to base of heart
  
  • Supplies left atrium and left ventricle
• Branch off Left Marginal Artery
  
  • Supplies the left ventricle
• The other branch that comes off the left cornary artery Left Anterior Descending Artery (Left Anterior Interventricular) which is running down in that interventricular sulcus that overlies the interventriculate septum
  
  • Supplies right ventricle, left ventricle and interventricular septum
  • Widowmarker - if there’s a clot this artery it supplies a critical part of the heart especifically left ventricle that when the tissue dies the heart will not be as strong enough to pump blood and support the rest of the organs and the brain, the individual will die. (males are more likely to have it)

Question 2

Myocardial Infarction (Heart Attack)

Answer 2

• Clot in cornary arteries
• Lack of blood flor to the myocardium (muscle layer of heart)
• Inflammation, infection, chlosterol/fat deposition - lumen (opening in the vessel) closes down and hard for fluid to get through
• Various pain presentation, for males pain left side of arm and for women the pain could be back or jaw, shortness of breath depending on which side of heart, backlog of fluid or left ventricular issue and right ventricular issue and blood isn’t pump affectiely to the lungs and the body’s tissue will be straved for oxygen throughout the body and the heart will have to pump more quickly
• Maybe treated CABG - Cornart artery by pass graft - Harvous a blood vessel from elsewhere and make a detour so blood has a bypass around the clot
  
  • Angioplasty - take a balloon and feed it through the arteries and get to the clot and inflate the balloon and expand so blood can move through often paired with Stents (metal things) inserted in artery and balloon will expand them to hold the artery open
  • tPA, able to activate a molecule in the body that will break down the clots
    *

Question 3

Venous System of the Heart

Answer 3

• To take deoxygenated blood away and bring it back into the atrium and sent to the lungs for reoxygenation
• Great Cardiac Vein - running down anterior side in that interventricular sulcus. It’s going to run alongside the anterior interventricular artery
• Look through the heart posterior side running along the posterior interventricular artery will be the Middle cardiac vein
• Small cardiac vein - close to the right mariginal artery
• they’re going to empty into the coronary sinus. The cornary sinus is a collecting area that sits in the coronary sulcus on the posterior/diaphragmatic surface of the heart then from there that coronary sinus will have opening via the cornary orifice into the right atrium to bring oxygenated blood back alongside with teh deoxygenated blood coming fro the superior and inferior vena cavae