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Patho Exam 3 - Cardio Verified and Updated
Questions and Answers (100% Correct
Answers)
The coronary arteries arise from the
Answer: left and right ostia downstream the aortic valve leaflets in the aortic root
Left main coronary artery arises from
Answer: left ostium and has 2 main branches
Anterior interventricular artery [Left anterior descending artery (LAD)]
Answer: Supplies interventricular septum and portions of the right and left ventricle
Circumflex artery
Answer: -Supplies left atrium and left lateral wall of left ventricle
-runs around the side of the heart along the left coronary sulcus and that's the area
of the heart that separates the left atrium and left ventricle.
-The circumflex supplies the left atrium and the left lateral wall of the ventricle.
Right coronary artery arises from
Answer: right ostia
Right coronary artery
Answer: -Right coronary artery follows the right coronary sulcus
-Supplies the right atrium, right ventricle, bottom portion of both ventricles and back
of the septum (posterior spetum)
-The sinoatrial and atrioventricular nodes are supplied by branches of the right
coronary artery
-Any RCA occlusion or obstruction greatly increases the potential for dysrhythmias.
Heart Valves
Answer: Ensure one-way blood flow (aka blood going in the right direction)
Atrioventricular (AV) valves
Answer: -Right AV valve has 3 cusps (tricuspid valve)
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-Left AV valve has 2 cusps (Mitral, Bicuspid valve) LAMB
Chordae tendineae
Answer: cords connect AV valves to papillary muscles (on floor of ventricles)
Semilunar valves - control flow into great arteries
Answer: -Pulmonic semilunar valve: from right ventricle into pulmonary artery
-Aortic semilunar valve: from left ventricle into aorta
atrial contraction =
Answer: ventricular relaxation
The AV valves have a greater tendency to prolapse because of their
Answer: larger surface area. This increased surface area means the AV valves are
exposed to much more of the force of the ventricular contraction and this increased
force could push the valves back into their respective atrium
We see more mitral valve prolapse just because
Answer: the left ventricular contraction is so much stronger than the right
ventricular contraction.
Diastole (atrial contraction)
Answer: · Ventricles relax, ventricular pressure drops, semilunar valves (aortic and
pulmonic) close, AV valves (tricuspid and mitral/bicuspid) open, blood flows from
atria to ventricles
· As the ventricles are relaxing, the volume is getting larger, and it's going to cause
the pressure in that ventricle to go down.
· The pressure in the aorta and the pressure in the pulmonary vasculature are going
to remain relatively the same
Systole (ventricular contraction)
Answer: · Ventricles contract, ventricular pressure rises, AV valves (tricuspid and
mitral/bicuspid) close and semilunar valves (aortic and pulmonic) open, blood flows
into arteries
· the volume in the ventricles get much smaller, and as that volume gets smaller, the
pressure is going to increase and it's going to overcome this downstream pressure to
allow for the opening of the aortic valve in this case, and the pulmonic valve in this
case.
Patho Exam 3 - Cardio Verified and Updated
Questions and Answers (100% Correct
Answers)
The coronary arteries arise from the
Answer: left and right ostia downstream the aortic valve leaflets in the aortic root
Left main coronary artery arises from
Answer: left ostium and has 2 main branches
Anterior interventricular artery [Left anterior descending artery (LAD)]
Answer: Supplies interventricular septum and portions of the right and left ventricle
Circumflex artery
Answer: -Supplies left atrium and left lateral wall of left ventricle
-runs around the side of the heart along the left coronary sulcus and that's the area
of the heart that separates the left atrium and left ventricle.
-The circumflex supplies the left atrium and the left lateral wall of the ventricle.
Right coronary artery arises from
Answer: right ostia
Right coronary artery
Answer: -Right coronary artery follows the right coronary sulcus
-Supplies the right atrium, right ventricle, bottom portion of both ventricles and back
of the septum (posterior spetum)
-The sinoatrial and atrioventricular nodes are supplied by branches of the right
coronary artery
-Any RCA occlusion or obstruction greatly increases the potential for dysrhythmias.
Heart Valves
Answer: Ensure one-way blood flow (aka blood going in the right direction)
Atrioventricular (AV) valves
Answer: -Right AV valve has 3 cusps (tricuspid valve)
, Inquire through: | Professional | Confidential Support
-Left AV valve has 2 cusps (Mitral, Bicuspid valve) LAMB
Chordae tendineae
Answer: cords connect AV valves to papillary muscles (on floor of ventricles)
Semilunar valves - control flow into great arteries
Answer: -Pulmonic semilunar valve: from right ventricle into pulmonary artery
-Aortic semilunar valve: from left ventricle into aorta
atrial contraction =
Answer: ventricular relaxation
The AV valves have a greater tendency to prolapse because of their
Answer: larger surface area. This increased surface area means the AV valves are
exposed to much more of the force of the ventricular contraction and this increased
force could push the valves back into their respective atrium
We see more mitral valve prolapse just because
Answer: the left ventricular contraction is so much stronger than the right
ventricular contraction.
Diastole (atrial contraction)
Answer: · Ventricles relax, ventricular pressure drops, semilunar valves (aortic and
pulmonic) close, AV valves (tricuspid and mitral/bicuspid) open, blood flows from
atria to ventricles
· As the ventricles are relaxing, the volume is getting larger, and it's going to cause
the pressure in that ventricle to go down.
· The pressure in the aorta and the pressure in the pulmonary vasculature are going
to remain relatively the same
Systole (ventricular contraction)
Answer: · Ventricles contract, ventricular pressure rises, AV valves (tricuspid and
mitral/bicuspid) close and semilunar valves (aortic and pulmonic) open, blood flows
into arteries
· the volume in the ventricles get much smaller, and as that volume gets smaller, the
pressure is going to increase and it's going to overcome this downstream pressure to
allow for the opening of the aortic valve in this case, and the pulmonic valve in this
case.
