Anatomy Flashcards
name the 6 coronary arteries
rca, lca, lcx, lad,rma, lma, posterior interventricular artery
SA and AV nodes are supplied by
RCA
if you have an infarct of the RCA, what will happen to SA and AV nodes?
nodal dysfunction (bradycardia or heart block)
Right dominant circulation is seen in what % of people
85%
R dominant circulation
this is when the PDA rises from the RCA
Left dominant circulation is seen in what % of people
8%
L dominant circulation
this is when the PDA arises from the LCX
Codominant circulation occurs in what % of the population
7%
Codominant circulation
arises from both the LCX and RCA
where does coronary occlusion most commonly occur?
LAD
When does coronary blood flow peak?
in early diastole
The most posterior part of the heart is the
left atrium
if you have an enlargement of the left atrium it can cause:
dysphagia (due to compression of the esophagus) or hoarseness (due to compression of the left recurrent laryngeal nerve, a branch of the vagus)
occlusion of the RCA results in
transmural ischemia of the inferior wall of the left ventricle –> ST elevation in leads II, III aVF as well as possible sinus node dysfunction
PDA supplies
most of the inferior wall of the left ventricle, which forms the diaphragmatic surface of the heart; supplies posteriors 1/3 of inter ventricular septum, posterior walls of ventricles, and posteromedial papillary muscle
LAD supplies
anterior 2/3 of interventiruclar septum, anterolateral papillary muscle, and anterior surface of left ventricle
LCS supplies
lateral and posterior walls of left ventricle, anterolateral papillary muscle
right (Acute) marginal artery supplies
right ventricle
how is the IVC formed?
union of the right and left common iliac veins at the level of L4- L5
LAD occlusion would result in
anteroseptal transmural ischemia with ST elevations in leads V1-V4
LCX occlusion would result in
ischemia of the lateral wall of the left ventricle with ST elevations in V5 and V6
the LCA gives off which 2 branches
LCX and LAD
