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IAMP Echo 1 final
Question | Answer |
---|---|
Where do the coronary arteries originate from? | The root of the aorta, immediately above the aortic valve. |
Where is the sinus of valsalva located? | Behind the aortic cusps just above the aortic valve. |
There are 3 aortic cusps in the AoV, so there are 3 sinuses of valsalva, how many coronary arteries are there? | 2 |
The left aortic sinus gives rise to the ______. | Left Coronary Artery |
The right aortic sinus gives rise to the ____. | Right Coronary Artery |
No vessels arise from the posterior aortic sinus which is therefore known as _____. | The non-coronary sinus |
The coronary arteries run over the epicardium and penetrate into the ____. | Myocardium |
Blood flow is from the Epicardium into the Endocardium. The 1st layer to sustain ischemia is the _______. | Endocardium, because it is the lase layer ti recieve blood. |
What is cardiac ischemia? | When the heart wall is recieveing decreased blood flow bc the coronary is partially or completely blocked. |
If a stent doesn't work at atherosclerosis, an _____ will be needed. | Arterial Bypass |
Coronary artery flow occurs during ______. | Diastole |
RCA flow comes from the ___. | RCC- runs anreriorly to the right AV junction and wraps around posteriorly. Then, it branches to the RPD which lays posterior and run toward the apex. |
RCA supplies blood to _______. | RA, RV, bottom portion of LV and septum. |
LCA flow comes from ________. | LCC- runs behind the pulmonary trunk for 2-3 cm. then it branches into the LCX and LAD. |
LCX runs _____. | along the AV junction wraps around posteriorly to face the RCA |
LCX supplies blood to the ______. | LA and the back of the LV. |
LPD runs _____. | Downward anteriorly to the apex to face the RPD. |
LPD supplies blood to the ______. | Front and bottom of the LV and septum. |
Great Cardiac Veins | The main venious drainage of the LV, lies beside the LAD. It joins the Posterior Cardiac Vein to form the Coronary sinus (in RA) |
Besian Veins | Small multiple veins that drain directly into the cardiac chamber. |
The LV is supplied by which coronary arteries? | LAD, LCX, and RPD. |
Which walls does the LAD supply? | ASW, AFW, SFW |
Which walls does the LCX supply? | LFW and PFW |
What wall does the RPD supply? | IFW |
Preload | Amount of blood in the ventricles before contraction. Peak of R |
Afterload | Amount of resistance (pressure) the ventricle has to overcome to eject the blood into the arteries. |
Frank Starling Law | Force of contraction is directly proportional to the degree of myocardial stretch. |
Hyperdynamic or Hypercontractile | In the case of abnormal increase preload. Larger amount of bloos in diastole comes into the ventricle, increase stretch of muscle and increase force of contraction. |
Hypodynamic or Hypocontractile | In the case of chronic overload. LV becomes dialated and has poor contraction bc the muscle of the wall is too stretched out. |
Most common causes of LV increase preload are... | 1. Mitral regurg2. VSD or ASD3. Aortic insufficiency4. Increase in systolic volume secondary to IHD. |
Pulmonary Artery Pressure | 25/10 |
Aortic Pressure | 120/80 |
Most common caues of ventricular pressure overload is... | Obstructions in the exit zone formed by the LVOT, AoV,and aortic root |
LV pressure overload | Preaortic obstruction, aortic stenosis, systemic hypertension |
RV pressure overload | Prepulmonic obstruction, pulmonic stenosis, poat pulmonic stenosis, pulmonis HTN |
EDV | Amount of blood in the LV at the end diastole. Peak of R |
ESV | Amount of blood in the LV at the end of systole. Peak of T |
SV | amount of blood ejected to aorta per heartbeatSV=EDV-ESVnormal value= 70-110 mL |
CO | Amount of blood ejected per minunetCO=SVxHRnormal value= 4-8 L/min |
EF | Percentage of blood ejected per beatEF=(EDV-ESV)/EDVx100SV/EDVx100normal value= 60-80% |
FS | Percentage of displacement of LV wall during each contractionFS=(EDD-ESD)/EDDx100 |