AP2 Lab 3 Coronary Vessels, Valves, Sounds, – and Dissection 1 - 18.5 & 18.10) The myocardium is not nourished by the blood while it is being pumped through the heart chambers. coronary arteries and veins Instead, visible on the surface of the heart supply nutrient rich and oxygen rich blood to (and from) the working myocardial muscle tissue. R and L coronary arteries. Two main arteries feed the heart: They both originate from the aorta very low at the level of the aortic SL valve. Find these on the heart models. They might actually be covered by fat or the pulmonary trunk where they emerge from the aorta. The R and L coronary arteries both have branches that feed parts of both ventricles. Which ventricle is the pump for the systemic circuit? ____________ Our primary concern is blood supply to this ventricle. R coronary artery (RCA) Identify the by following the border along the upper edge of the RV and lower edge of the RA. Trace its branches far enough to see how it supplies blood to the inferior and posterior walls of the LV. SA node AV It supplies blood to the in 55% of people and to the node in 90% of people. If you were to lose BF to the SA node what arrhythmia you have and approximately what HR? ____________________________. Explain. L. coronary artery (lca) Identify the [Most of this vessel is hidden under the pulmonary trunk] Note that as soon as it emerges from under the pulmonary trunk it splits into two main branches: 1st Branch: L Anterior Descending artery (lad) (a.k.a. Anterior Identify the Interventricular artery) that descends on the anterior side of IV sulcus. in the Trace its branches to see how this artery feeds the anterior wall interventricular septum of LV as well as the
AP2 Lab 3 – Coronary Vessels, Valves, Sounds, and Dissection 1 - 18.5 & 18.10) The myocardium is not nourished by the blood while it is being pumped through the heart chambers. Instead, coronary arteries and veins visible on the surface of the heart supply nutrient rich and oxygen rich blood to (and from) the working myocardial muscle tissue. Two main arteries feed the heart: R and L coronary arteries. They both originate from the aorta very low at the level of the aortic SL valve. Find these on the heart models. They might actually be covered by fat or the pulmonary trunk where they emerge from the aorta. The R and L coronary arteries both have branches that feed parts of both ventricles. Which ventricle is the pump for the systemic circuit? ____________ Our primary concern is blood supply to this ventricle. Identify the R coronary artery (RCA) by following the border along the upper edge of the RV and lower edge of the RA. Trace its branches far enough to see how it supplies blood to the inferior and posterior walls of the LV. It supplies blood to the SA node in 55% of people and to the AV node in 90% of people. If you were to lose BF to the SA node what arrhythmia you have and approximately what HR? ____________________________. Explain. Identify the L. coronary artery (lca) [Most of this vessel is hidden under the pulmonary trunk] Note that as soon as it emerges from under the pulmonary trunk it splits into two main branches: 1st Branch: Identify the L Anterior Descending artery (lad) (a.k.a. Anterior Interventricular artery) that descends on the anterior side of in the IV sulcus. Trace its branches to see how this artery feeds the anterior wall of LV as well as the interventricular septum
AP2%20Lab%2003%20-%20Coronary%20Vessels,%20Valves,%20Sounds,%20Dissection.docx