ECG/EKG Final Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The ECG waveform is indicative of: | How the heart is functioning electrically
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| The Einthoven Triangle is formed by the following 3 limb leads: | Right arm (RA, Left arm (LA), Left leg (LL)
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| All of the following are types of leads from the 12-lead ECG: | Bipolar, Unipolar, Chest
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| The following are considered a bipolar lead: | Lead I, Lead II, Lead III
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| The proper location to place the V1 lead is the: | 4th intercostal space, right sternal border; i.e. 4th IC, R-SB
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| For the proper placement of V3, you must have placed which other two leads on the patient's chest? | V2 and V4
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| Unipolar leads include all the lead types: | Augmented, Chest, Precordial (same as chest)
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| To obtain a 12-lead ECG tracing, you must apply how many lead wires and electrodes to the patient? | 10
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| The proper location to place the V2 lead is the: | 4th intercostal space, left sternal border
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| The 3 types of leads that make up a 12-lead ECG consist of: | 3 standard (Lead I, II, III), 3 augmented (AVR, AVL, AVF), and 6 chest leads (V1 - V6)
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| The basic functions of the electrocardiograph: | Input, Signal Processing, & Output display
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| The signal processing occurs inside the ECG machine and it: | amplifies the electrical impulse, converts the impulse into mechanical actions on the display, & prepares the signal for transfer to the output display or printed report
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| The most common setting for standard speed rate for the ECG machine is: | 25 mm/sec
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| The gain control is normally set at: | 10 mm/mv
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| The LCD display shows the following info: | Patient data/information, information from the ECG computer, & status of the electrodes
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| To read the ECG tracing when the rate is fast, set the speed control rate to: | 50 mm/sec
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| The usual setting for the artifact filters is: | 40 Hz
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| To conduct a 12-lead ECG on a patient only use: | a complete set of 10 electrodes that are the same.
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| Hospitals or acute care settings prefer to use what type of electrodes: | Silver electrodes
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| The ECG graph paper represents time _________ and ________ vertically. | horizontally, voltage
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| What time and voltage are represented in one ECG graph paper box? | Time: 0.20 second / Voltage: 0.5 mV
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| What does it mean when a red line appears at the bottom of the ECG graph paper? | The ECG paper is running low and needs to be replaced soon.
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| Each small box on the ECG paper horizontally represents: | Time: 0.04 second
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| The advantages of using dot matrix paper instead of standard grid paper are: | Dot matrix paper - requires less ink, is easier to read, and produces sharper photocopies.
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| The substances that can accidentally erase the ECG tracing are: | Alcohol, Sunlight, X-ray film
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| The ECG tracing must be maintained as part of the patient's medical record for how long? | 7 years
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| When the papers speed is 25 mm/sec, how many boxes are there per minute? | 300 large boxes per minute
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| The three methods of calculating heart rates are: | R-R method, 1500 method, 6-second method
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| The only method used to calculate heart rates with an irregular rhythm is: | 6-second method
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| When using the 6-second method calculation, you must locate 6 seconds on a rhythm strip, count the number of complexes, and multiply by: | 10
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| The heart rate method producing the most accurate with regular rhythms is the: | R-R method
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| The best source to obtain specific info to perform an ECG with accuracy is to refer to the machine's: | manufacturer's instructions
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| Computerized interpretation of the ECG tracing: | must be validated by a physician.
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| A multichannel ECG monitors all 12 leads but usually records how many leads at one time: | 3 leads at one time
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| Some reasons you may change the speed of the ECG tracing are: | Rhythm rate is too fast; can't clearly identify the waves because they are too close together; per physician's orders.
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| If you attempt to record an ECG and no tracing appears, what should you do: | re-check the lead wires to make sure they are placed correctly.
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| Bradycardia means: | slow heart rate
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| Tachycardia means: | fast heart rate
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| T/F: Lead V4 placement is the 5th intercostal space at the midclavicular line: | True
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| Each of the 12 leads of an ECG tracing represents a single view of the heart. | True
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| The chest (precordial) leads are the bipolar type of leads. | False - the chest leads are unipolar type of leads.
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| The artifact filter selection is used to reduce artifacts due to muscle tremors and slight patient movement. | True
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| Only one-time electrodes must be used with an application of gel or paste conduction material. | False -
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| The ECG paper consists of horizontal lines that measure voltage and vertical lines that measure the time period. | False - horizontal lines measure time and vertical lines measure the voltage.
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| A method used to estimate the heart rate is to locate a 6-second strip, count the number of complexes, and then multiply by 10. | True
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| To reduce the size of the ECG tracing by half, set the gain to 5 mm/mV; to double the ECG tracing size, set the gian to 20 mm/mV. | True
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| Signal processing occurs inside the ECG machine, amplifying the electrical impulse and converting it into a tracing display. | True
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| To be able to interpret the information, the ECG machine increases the size of the waveforms in leads aVR, aVL, and aVF. | True
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| A standard 12-lead ECG uses 12 electrodes. | False - it uses 10 electrodes/sensors.
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