pack Flashcards
(11 cards)
What is the fibrous skeleton of the heart continuous with?
continuous with the membranous interventicular septum
What is the orientation of the cusps in the semilunar valves?
Pulmonary: RLA
Aortic: RLP
EXTREMLY IMPORTANT: Doc says it’s always a q The closure of what valves causes the first beating sound of the heart? (lubb)
Closure of atrioventicular valves (the semilunar valves will be open at this time)
EXTREMLY IMPORTANT: Doc says it’s always a q The closure of what valves causes the second beating sound of the heart? (dubb) (bc second contains d)
Closure of Semilunar valves (the atrioventicular valves will be open at this time) (bc second and semilunar both have S)
Where is the best place to listen (auscultation) to the aortic valve on the chest wall?
Second right intercostal space
Where is the best place to listen (auscultation) to the Pulmonary valve on the chest wall?
Left second intercostal space (bc blood passes to the opposite side bc it is a bit slanted)
Where is the best place to listen (auscultation) to the left atrioventicular/mitral/bicuspid valve on the chest wall?
at the apex, left fifth intercostal space at the point that intersects the midclavicular line.
Where is the best place to listen (auscultation) to the right atrioventicular/tricuspid valve on the chest wall?
left lower sternal border
Where is the SV node located?
located subendocardially near the apex of the crista terminalis where the SVC joins the right atrium
Which vertebrae segments do the preganglionic sympathetic fibers of the heart originate from?
T1-T5
Where do the Sympathetic and parasympathetic postganlionic nerves terminate?
On the SA and AV nodes, on cardiac muscle fibers, and on the coronary arteries (makes sense bc they control whether the heart rate increases or decreases)
