21293422
Descripción
Test por Aaron Fried, actualizado hace más de 1 año
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Creado por Aaron Fried
hace alrededor de 4 años
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Pregunta 1
Pregunta
Which answer best defines a biopotential?
Respuesta
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An electrical gradient in living cells.
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Kinetic energy in an organism.
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All of the things a human can do on their lifetime.
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The ions in a cell.
Pregunta 2
Pregunta
Excitable tissue is defined by its ability to
Respuesta
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Respond to changes in the environment.
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Generate electricity.
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Create an action potential
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All of these are true.
Pregunta 3
Pregunta
Which series of events in the cardiac cycle occurs first?
Respuesta
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Electrical
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Mechanical
Pregunta 4
Pregunta
What is the benefit of a 12-lead ECG? In other words, why isn’t one lead sufficient?
Respuesta
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Multiple leads provide a 3 dimensional image of the electrical activity of the heart.
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Each additional lead duplicates and verifies the others.
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There is no benefit.
Pregunta 5
Pregunta
When reading an ECG the vertical axis is calibrated in [blank_start]millivolts[blank_end] while the horizontal axis is calibrated in [blank_start]seconds[blank_end].
Respuesta
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millivolts
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seconds
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millivolts
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seconds
Pregunta 6
Pregunta
What wave on an ECG indicates depolarization of the atria?
Respuesta
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P wave
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QRS Complex
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T wave
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PQ interval
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QT interval
Pregunta 7
Pregunta
What portion of an ECG indicates the time it takes for an electrical impulse to reach the ventricles?
Respuesta
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P wave
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QRS Complex
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T wave
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PR interval
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QT interval
Pregunta 8
Pregunta
Which of the following is not represented by a specific wave on a typical electrocardiogram?
Respuesta
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depolarization of the atria
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repolarization of the atria
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depolarization of the ventricles
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repolarization of the ventricles
Pregunta 9
Pregunta
Which happens first?
Respuesta
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depolarization of the atria
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depolarization of the ventricles
Pregunta 10
Pregunta
A positive T-wave is generally an indication of a cardiac abnormality.
Respuesta
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True
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False
Pregunta 11
Pregunta
When referring to cardiac rhythm, what does the term irregular refer to?
Respuesta
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No R-R interval differs from any other R-R interval by more than 0.12 second.
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No R-R interval differs from any other R-R interval by more than 0.06 second.
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Less than 75 beats in one minute.
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More than 75 beats in one minute.
Pregunta 12
Pregunta
Given the following information, determine the heart rate as precisely as the rules allow.
Heart rhythm is irregular
There are 6 R-waves in 6-inch tracing
There are 6.7 R-R intervals in 6-inch tracing
Heart rate is: [blank_start]55[blank_end] bpm
Respuesta
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55
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56
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57
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58
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59
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60
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61
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62
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63
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64
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65
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66
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67
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68
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69
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70
Pregunta 13
Pregunta
If the R-R interval on an ECG tracing increases, heart rate must be:
Respuesta
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increasing.
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decreasing.
Pregunta 14
Pregunta
During a cardiac cycle, which valves close first?
Respuesta
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Atrioventricular (AV) valves
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Semilunar (SL) valves
Pregunta 15
Pregunta
The semilunar valves close when ventricular pressure:
Respuesta
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rises
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falls
Pregunta 16
Pregunta
If the amplitude of a pulse wave increases this would be a rough in indication that stroke volume is:
Respuesta
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increasing
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decreasing
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