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The flashcards below were created by user
brendadespain
on FreezingBlue Flashcards.
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The heart is located
Between the lungs
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The serous inner membrane lining of the heart is the
endocardium
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The primary purpost of the heart valves is to
prevent the backward flow of blood
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When listening to the heart with a stethoscope, the sound heard is actually the
closing of the heart valves
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The SA node, located in the right atrium of the heart, is known as the
pacemaker of the heart & the sinoatrial node
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The SA note is located in or on the
right atrium
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The "little spark" that begins or starts the heartbeat originates in the
SA node
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The correct order of stimulation in the electrical conduction system of the heart is
SA node, AV node, bundle of HIS, bundle of branches, Purkinje network
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The portion of the EKG that relates to ventricular depolarization is the
QRS complex
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The contraction and relaxation of both atria and ventricles equal
one cardiac cycle
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The electrical state of the heart in which the cardiac cells are in a state of resting is
polarization & negatively charged
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When the cardiac cells are discharging a positively charged electrical impulse, whic creates a contraction, they are said to be in a state of
depolarization
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What wave on an EKG reflects the repolarization of the ventricles?
T wave
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An electrocardiogram is a
recording of the voltage with respect to time
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An electrocardiogram is also referred to as an
ECG & EKG
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Another name for an electrode is a
sensor
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Normally, a completer ECG/EKG constists of how many sensors and how many leads?
10, 12
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The type of EKG sensors that appear to be small suction cups are called
Welch electrodes
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The only cardiac sensor that is NOT actually used in the recording of an EKG is the
RL
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A lead is
One negative, one positive, and one ground
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Remembering all the EKG leads and sensors can be facilitated by visualizing the
Einthoven's triangle
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The landmarks for the chest leads for an EKG are the sternum, both clavicles, the left exilla, and the
4th intercostal space
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The time markers printed on all EKG paper are referred to as
3 second markers
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The small squares on EKG paper are
1mm square and represent 0.1 mv of voltage
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To use the EKG to estimate heart rate, you would
use the six second method, beginning at a 3 second marker and go to the right for 2 additional markers, then count the # of QRS complexes between the first and third markers
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A normal P wave is how many squares/blocks on the EKG paper?
3
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The paper on an EKG machine, as part of an international standard, moves at the rate of
25mm per second
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When performing an EKG, if the baseline begins to drift to such a degree that it exceeds the parameters of the the graph
reduce the sensitivity from 1 to 1/2
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A deflection on an EKG tracing caused by electrical activity other than from the heart is known as an
artifact
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The degree of variation from zero, up or down, in recording the electrical output of the heart is known as the
deflection
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during an EKG, a tense muscle or a muscular contraction may produce an artifact called a
somatic tremor
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An artifact in leads, 1,2, and AVR would cause you to recheck the sensors attached to which body part?
right arm
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A standard limb lead monitors voltage from
two of the following - RA, LA, LL
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Lead V1 of the precordial chest leads is placed at the
4th intercostal space just to the right of the sternum
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Lead 1 of the limb leads measures electrical activity from the
right arm to left arm (RA to LA)
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The marking codes used on the older models of EKG machines indicated lead III as
...
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When performing an EKG, on a patient with a right lower leg cast, the leg sensors are
on both upper legs
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A majority of patients who have had a heart attack have an EKG tracing that exhibits
PVC's
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An elecated T wave may be present on a patiens's EKG when the patient
has an elecated serum potassium
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One of the dangers of performing a stress test in the medical office id the risk of a
heart attack
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A device used to record cardiac activity while the patient is ambulatory for at least 24 hours is called a
Holter monitor
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The test performed to evaluate lung volume and capacity in a patient is called
pulmonary funtion test
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What part of the brain controls body temperature?
Hypothalamus
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The part of the brain that controls respiratory, cardiac, and vasomotor functions is the
medulla oblongata
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True or false - infants and children normally have a lower body temp than adults
false
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What are the normal temps for Oral, rectal, axillary, & aural
- Oral=98.6F/37C
- Rectal = 99.6F/37.6C
- Axillary = 97.6/36.4C
- Aural = 98.6F / 37C
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True or false - The acillary mehod has proven to be the mose accurate method for temperature measurement
false
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A temp of 101 degrees F is equal to how many degrees C
38.3C
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A temp of 37 degrees C is equal to how many degrees F
98.6
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When reading a mercury thermometer, each short line represents
2/10 of a degree
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When taking a rectal remp on a pediatric patient, insert the thermometer into the anal canal approximately
1/2 to 1"
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An accurate axillary temp reisters approx how many degrees lower than a rectal temp?
1 degree
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The average normal rectal temp is
99.6 F
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The gradual drop of a fever is termed
Lysis
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True or false - When taking a aural temp on a pediatric patient, the MA must not pull the childs ear in any direction
false
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True or false - keep a glass/merc thermometer in place orally for at least 3 min, an Axilla for at least 10 min, and rectal for 5 min
True
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True or false - as age increases, pulse rate increses
false
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A child less than 1 yr old may have a pulse rate that ranges between
120 & 160
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The force or strength of the pulse is commonly referred to as the
volume
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