NUR 241 Exam #1 Questions with
complete verified
solutions(GRADED A+)
ions - answer The flow of _______ back and forth across the cardiac
cell membrane causes electrical impulses.
more - answer In a resting cardiac cell, there are _______ negative
ions inside the cell than outside the cell. (more or less)
follows - answer Muscle contraction _____________ depolarization.
(precedes or follows)
- slow conduction to allow time for the atria to contract and empty
contents into the ventricles
- function as a secondary pacemaker
- blocks some impulses from being conducted to the ventricles when
the atrial rate is rapid - answer What are the three main functions of
the AV node?
slower - answer The farther away the impulse originates from the
SA node, the _________ the rate. (slower or faster)
- orientation of the heart in the chest
- conduction disturbances
- electrical effects of medications and electrolytes
- mass of cardiac muscle
- presence of ischemic damage - answer An EKG provides
information about...
,0.04 - answer Each small square on an EKG represents _______
seconds.
0.2 - answer Each big square on an EKG represents ______ seconds.
5 - answer Each big square on an EKG is ______ small squares across.
- smooth and round
- positive in deflection
- *0.5 to 2.5 mm in height*
- *0.10 seconds or less in width* - answer Describe the
characteristics of normal P waves. (include range for height and
width)
0.12 (3 small blocks) - answer The QRS complex should be less than
______ seconds.
- round and slightly asymmetrical
- positive in deflection
- *amplitude less than 5 mm* - answer Describe the characteristics
of normal T waves.
0.12 and 0.2 (3 to 5 small blocks) - answer The PR interval should be
between ______ and ______ seconds.
0.12 - answer When measuring the R-R interval, if the measurement
is off by ______ seconds, the rhythm is considered to be irregular.
Count the number of R waves in a 6 second strip and multiply by 10.
- answer How is the R-R interval calculated?
, mitral valve stenosis - answer Which heart condition is associated
with rheumatic fever?
- *left lateral position* (if patient can tolerate)
- supine with HOB raised 30-45 degrees
- sitting - answer Which patient positions are appropriate when
performing a cardiovascular assessment?
at the apex with the diaphragm - answer Where is S1 best heard?
at the left and right second intercostal spaces with the diaphragm -
answer Where is S2 best heard?
at the mitral area with the bell, with patient laying on their left side
- answer Where are S3 and S4 best heard?
- normal: in children or during pregnancy
- abnormal: in adults over age 31 - answer When is S3 considered
normal? Abnormal?
right - answer Blood pressure readings tend to be higher in the
_______ arm. (right or left)
- patient should be sitting or lying supine with HOB elevated 30
degrees
- place the bell of the stethoscope over the artery
- have patient turn their head slightly away from the side being
examined
- ask patient to momentarily hold their breath
- *normally do not hear any sounds* - answer How is the carotid
artery properly auscultated?
complete verified
solutions(GRADED A+)
ions - answer The flow of _______ back and forth across the cardiac
cell membrane causes electrical impulses.
more - answer In a resting cardiac cell, there are _______ negative
ions inside the cell than outside the cell. (more or less)
follows - answer Muscle contraction _____________ depolarization.
(precedes or follows)
- slow conduction to allow time for the atria to contract and empty
contents into the ventricles
- function as a secondary pacemaker
- blocks some impulses from being conducted to the ventricles when
the atrial rate is rapid - answer What are the three main functions of
the AV node?
slower - answer The farther away the impulse originates from the
SA node, the _________ the rate. (slower or faster)
- orientation of the heart in the chest
- conduction disturbances
- electrical effects of medications and electrolytes
- mass of cardiac muscle
- presence of ischemic damage - answer An EKG provides
information about...
,0.04 - answer Each small square on an EKG represents _______
seconds.
0.2 - answer Each big square on an EKG represents ______ seconds.
5 - answer Each big square on an EKG is ______ small squares across.
- smooth and round
- positive in deflection
- *0.5 to 2.5 mm in height*
- *0.10 seconds or less in width* - answer Describe the
characteristics of normal P waves. (include range for height and
width)
0.12 (3 small blocks) - answer The QRS complex should be less than
______ seconds.
- round and slightly asymmetrical
- positive in deflection
- *amplitude less than 5 mm* - answer Describe the characteristics
of normal T waves.
0.12 and 0.2 (3 to 5 small blocks) - answer The PR interval should be
between ______ and ______ seconds.
0.12 - answer When measuring the R-R interval, if the measurement
is off by ______ seconds, the rhythm is considered to be irregular.
Count the number of R waves in a 6 second strip and multiply by 10.
- answer How is the R-R interval calculated?
, mitral valve stenosis - answer Which heart condition is associated
with rheumatic fever?
- *left lateral position* (if patient can tolerate)
- supine with HOB raised 30-45 degrees
- sitting - answer Which patient positions are appropriate when
performing a cardiovascular assessment?
at the apex with the diaphragm - answer Where is S1 best heard?
at the left and right second intercostal spaces with the diaphragm -
answer Where is S2 best heard?
at the mitral area with the bell, with patient laying on their left side
- answer Where are S3 and S4 best heard?
- normal: in children or during pregnancy
- abnormal: in adults over age 31 - answer When is S3 considered
normal? Abnormal?
right - answer Blood pressure readings tend to be higher in the
_______ arm. (right or left)
- patient should be sitting or lying supine with HOB elevated 30
degrees
- place the bell of the stethoscope over the artery
- have patient turn their head slightly away from the side being
examined
- ask patient to momentarily hold their breath
- *normally do not hear any sounds* - answer How is the carotid
artery properly auscultated?
