CFRN SECTION 8: CARDIAC ANATOMY
AND
PHYSIOLOGY UPDATED QUESTIONS &
ANSWERS 2026/2027 LATEST UPDATE
what artery does the RCA turn into? - CORRECT ANSWER>>>>the
PDA posterior descending
artery
what two arteries does the LCA bifurcate into? - CORRECT
ANSWER>>>>LAD left andterior descending LCX circumflex
what part of the heart does the LAD supply? - CORRECT
ANSWER>>>>anterior wall and left anterior 2/3 of septum what part
of the heart does the LCX supply? - CORRECT ANSWER>>>>the left
lateral wall
which ventricle is more susceptible to injury? - CORRECT
ANSWER>>>>the right ventricle because faces front
what is sick sinus syndrome caused by? - CORRECT
ANSWER>>>>plaque in the artery for the SA node off of the RCA
the RCA feeds in order what parts of the heart? - CORRECT
ANSWER>>>>SA node right ventricle AV node
left posterior
wall left
inferior wall
the LAD feeds what parts of the heart? - CORRECT
ANSWER>>>>Anterior wall left anterior 2/3 of septum
,RBB
anterior fasicle
the conduction system of the heart travels in what order? - CORRECT
ANSWER>>>>SA node AV node
Bundle of His the left
and right bundles the
RBB feeds purkinjie
fibers the left BB
bifurcates into
1. anterior fasicle
2. posterior fasicle
how is the posterior fasicle of the LBB fed with oxygen? - CORRECT
ANSWER>>>>the LAD and RCA
the anterior fasicle of the LBB and the RBB are oxygenated by what
arteries? - CORRECT
ANSWER>>>>LAD
what are the three layers of the heart? - CORRECT
ANSWER>>>>epicardium myocardium:thick muscular
endocardium: thin inside
what type of muscle is the heart made of? - CORRECT
ANSWER>>>>striated and intercalated cells
2 spiral and 1 circular
the four chambers of the heart are diviided by what? - CORRECT
ANSWER>>>>intraventricular
septum atrial ventricular septum
what order are the valves of the heart? - CORRECT
ANSWER>>>>Tricuspid Pulmonary
, Mitral Aortic which valves are atrioventricular? - CORRECT
ANSWER>>>>tricuspid and Mitral which heart valves are
semilunar? - CORRECT ANSWER>>>>Pulmonary and Aortic
what creates the heart sounds we auscultate? - CORRECT
ANSWER>>>>the closing of the heart valves
where do the right and left coronary arteries aries from? - CORRECT
ANSWER>>>>the coronary ostia at the aortic root
the right coronary artery RCA oxygenates what portion of the heart? -
CORRECT
ANSWER>>>>AV
node, right
ventricle SA node
left posterior
inferior wall
internodal pathways - CORRECT ANSWER>>>>are between
the SA and AV nodes middle anterior (weinkebach's) posterior
(Thorel's)
where in the conduction system of the heart does a LBBB occur? -
CORRECT
ANSWER>>>>before the bifurcation of the ant and posterior fasicle so
both are out of service How many of the cardiac bundle branches need
to conduct to the perkenjie fibers? - CORRECT
ANSWER>>>>only one
they will all be depolarized but may be delayed
what are the two types of cardiac infarcts? - CORRECT
ANSWER>>>>1. transmural
2 . nontransmural/subendocardial
AND
PHYSIOLOGY UPDATED QUESTIONS &
ANSWERS 2026/2027 LATEST UPDATE
what artery does the RCA turn into? - CORRECT ANSWER>>>>the
PDA posterior descending
artery
what two arteries does the LCA bifurcate into? - CORRECT
ANSWER>>>>LAD left andterior descending LCX circumflex
what part of the heart does the LAD supply? - CORRECT
ANSWER>>>>anterior wall and left anterior 2/3 of septum what part
of the heart does the LCX supply? - CORRECT ANSWER>>>>the left
lateral wall
which ventricle is more susceptible to injury? - CORRECT
ANSWER>>>>the right ventricle because faces front
what is sick sinus syndrome caused by? - CORRECT
ANSWER>>>>plaque in the artery for the SA node off of the RCA
the RCA feeds in order what parts of the heart? - CORRECT
ANSWER>>>>SA node right ventricle AV node
left posterior
wall left
inferior wall
the LAD feeds what parts of the heart? - CORRECT
ANSWER>>>>Anterior wall left anterior 2/3 of septum
,RBB
anterior fasicle
the conduction system of the heart travels in what order? - CORRECT
ANSWER>>>>SA node AV node
Bundle of His the left
and right bundles the
RBB feeds purkinjie
fibers the left BB
bifurcates into
1. anterior fasicle
2. posterior fasicle
how is the posterior fasicle of the LBB fed with oxygen? - CORRECT
ANSWER>>>>the LAD and RCA
the anterior fasicle of the LBB and the RBB are oxygenated by what
arteries? - CORRECT
ANSWER>>>>LAD
what are the three layers of the heart? - CORRECT
ANSWER>>>>epicardium myocardium:thick muscular
endocardium: thin inside
what type of muscle is the heart made of? - CORRECT
ANSWER>>>>striated and intercalated cells
2 spiral and 1 circular
the four chambers of the heart are diviided by what? - CORRECT
ANSWER>>>>intraventricular
septum atrial ventricular septum
what order are the valves of the heart? - CORRECT
ANSWER>>>>Tricuspid Pulmonary
, Mitral Aortic which valves are atrioventricular? - CORRECT
ANSWER>>>>tricuspid and Mitral which heart valves are
semilunar? - CORRECT ANSWER>>>>Pulmonary and Aortic
what creates the heart sounds we auscultate? - CORRECT
ANSWER>>>>the closing of the heart valves
where do the right and left coronary arteries aries from? - CORRECT
ANSWER>>>>the coronary ostia at the aortic root
the right coronary artery RCA oxygenates what portion of the heart? -
CORRECT
ANSWER>>>>AV
node, right
ventricle SA node
left posterior
inferior wall
internodal pathways - CORRECT ANSWER>>>>are between
the SA and AV nodes middle anterior (weinkebach's) posterior
(Thorel's)
where in the conduction system of the heart does a LBBB occur? -
CORRECT
ANSWER>>>>before the bifurcation of the ant and posterior fasicle so
both are out of service How many of the cardiac bundle branches need
to conduct to the perkenjie fibers? - CORRECT
ANSWER>>>>only one
they will all be depolarized but may be delayed
what are the two types of cardiac infarcts? - CORRECT
ANSWER>>>>1. transmural
2 . nontransmural/subendocardial
