cardiac apex-obtaining ECG
Study online at https://quizlet.com/_eykr2f
1. What is an ECG? electrocardiogram is a recording of the hearts electrical activity from various angles
or leads, and on various sized paper
2. what does nor- in waveform, development, the speed at which the electrical waveform moves
mal ECG wave- across the myocardium during atrial and ventricular contraction (depolarization)
form look like? and relaxation (repolarization) determines the type and size of the deflection
recorded on an ECG.
3. What are some P wave, QRS, and T wave
wave types?
4. What is P wave? represents atrial depolarization as electrical impulses conduct through the atria in
ring-like waves from the SA node. appears on ECG as smaller, rounded deflection.
- represents electrical depolarization of the atria normal P waves do not exceed
2.5mm in amplitude and are usually wide.
5. What is QRS represents the centricular depolarization as conduction reaches the larger ventric-
wave? ular pathway through the bundle branches and purkinje fibers. appears on ECG
as rapid, large spike deflection, the stimulation atrial repolarization waveform is
buries in the QRS and not seen.
6. What is T wave? represents the ventricular repolarization or relaxation. appears of ECG as larger,
rounded deflection.
7. Voltage is voltage is vertical, time is horizontal
_________, time is
________
8. why is the size is to understand the ECG heart rate, intervals, waveforms, and other specifics of the
ECG paper so im- cardiac cycle.
portant?
9.
1/7
, cardiac apex-obtaining ECG
Study online at https://quizlet.com/_eykr2f
How is voltage vertically in millimeters (mm). the small square is 1mm, and the large square is
measured? 5mm of voltage
10. How is time mea- time is recorded horizontally in seconds. the small square is 0.04 seconds and the
sured? large is 0.2 seconds of time.
11. How do you consider each small block as a one story house, if you stack 5 houses on top of one
remember the another, it wouls be the size of a 5 story apartment (or one large block)
height or volt-
age component
of the ECG trac-
ing in graph pa-
per?
12. how do you re- consider each small block a car, 5 cars would take up as much as a semi truck
member the time
or width compo-
nent of the ECG
tracing in graph
paper?
13. what is deflec- as depolarization moves across the myocardium, the electrical impulse is detected
tion? by electrodes placed on the skin.
14. what is a pos- when a wave of electrical activity moves toward a positive electrode and produces
itively deflected a positive deflection on the ECG tracing
waveform?
15. what is a neg- when a wave of electrical activity moves away from a positive electrode producing
atively deflected a negative deflection on the ECG tracing.
waveform?
16.
2/7
Study online at https://quizlet.com/_eykr2f
1. What is an ECG? electrocardiogram is a recording of the hearts electrical activity from various angles
or leads, and on various sized paper
2. what does nor- in waveform, development, the speed at which the electrical waveform moves
mal ECG wave- across the myocardium during atrial and ventricular contraction (depolarization)
form look like? and relaxation (repolarization) determines the type and size of the deflection
recorded on an ECG.
3. What are some P wave, QRS, and T wave
wave types?
4. What is P wave? represents atrial depolarization as electrical impulses conduct through the atria in
ring-like waves from the SA node. appears on ECG as smaller, rounded deflection.
- represents electrical depolarization of the atria normal P waves do not exceed
2.5mm in amplitude and are usually wide.
5. What is QRS represents the centricular depolarization as conduction reaches the larger ventric-
wave? ular pathway through the bundle branches and purkinje fibers. appears on ECG
as rapid, large spike deflection, the stimulation atrial repolarization waveform is
buries in the QRS and not seen.
6. What is T wave? represents the ventricular repolarization or relaxation. appears of ECG as larger,
rounded deflection.
7. Voltage is voltage is vertical, time is horizontal
_________, time is
________
8. why is the size is to understand the ECG heart rate, intervals, waveforms, and other specifics of the
ECG paper so im- cardiac cycle.
portant?
9.
1/7
, cardiac apex-obtaining ECG
Study online at https://quizlet.com/_eykr2f
How is voltage vertically in millimeters (mm). the small square is 1mm, and the large square is
measured? 5mm of voltage
10. How is time mea- time is recorded horizontally in seconds. the small square is 0.04 seconds and the
sured? large is 0.2 seconds of time.
11. How do you consider each small block as a one story house, if you stack 5 houses on top of one
remember the another, it wouls be the size of a 5 story apartment (or one large block)
height or volt-
age component
of the ECG trac-
ing in graph pa-
per?
12. how do you re- consider each small block a car, 5 cars would take up as much as a semi truck
member the time
or width compo-
nent of the ECG
tracing in graph
paper?
13. what is deflec- as depolarization moves across the myocardium, the electrical impulse is detected
tion? by electrodes placed on the skin.
14. what is a pos- when a wave of electrical activity moves toward a positive electrode and produces
itively deflected a positive deflection on the ECG tracing
waveform?
15. what is a neg- when a wave of electrical activity moves away from a positive electrode producing
atively deflected a negative deflection on the ECG tracing.
waveform?
16.
2/7
