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ECG Review

ECG/EKG Final Review

The ECG waveform is indicative of: How the heart is functioning electrically
The Einthoven Triangle is formed by the following 3 limb leads: Right arm (RA, Left arm (LA), Left leg (LL)
All of the following are types of leads from the 12-lead ECG: Bipolar, Unipolar, Chest
The following are considered a bipolar lead: Lead I, Lead II, Lead III
The proper location to place the V1 lead is the: 4th intercostal space, right sternal border; i.e. 4th IC, R-SB
For the proper placement of V3, you must have placed which other two leads on the patient's chest? V2 and V4
Unipolar leads include all the lead types: Augmented, Chest, Precordial (same as chest)
To obtain a 12-lead ECG tracing, you must apply how many lead wires and electrodes to the patient? 10
The proper location to place the V2 lead is the: 4th intercostal space, left sternal border
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)
The basic functions of the electrocardiograph: Input, Signal Processing, & Output display
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
The most common setting for standard speed rate for the ECG machine is: 25 mm/sec
The gain control is normally set at: 10 mm/mv
The LCD display shows the following info: Patient data/information, information from the ECG computer, & status of the electrodes
To read the ECG tracing when the rate is fast, set the speed control rate to: 50 mm/sec
The usual setting for the artifact filters is: 40 Hz
To conduct a 12-lead ECG on a patient only use: a complete set of 10 electrodes that are the same.
Hospitals or acute care settings prefer to use what type of electrodes: Silver electrodes
The ECG graph paper represents time _________ and ________ vertically. horizontally, voltage
What time and voltage are represented in one ECG graph paper box? Time: 0.20 second / Voltage: 0.5 mV
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.
Each small box on the ECG paper horizontally represents: Time: 0.04 second
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.
The substances that can accidentally erase the ECG tracing are: Alcohol, Sunlight, X-ray film
The ECG tracing must be maintained as part of the patient's medical record for how long? 7 years
When the papers speed is 25 mm/sec, how many boxes are there per minute? 300 large boxes per minute
The three methods of calculating heart rates are: R-R method, 1500 method, 6-second method
The only method used to calculate heart rates with an irregular rhythm is: 6-second method
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
The heart rate method producing the most accurate with regular rhythms is the: R-R method
The best source to obtain specific info to perform an ECG with accuracy is to refer to the machine's: manufacturer's instructions
Computerized interpretation of the ECG tracing: must be validated by a physician.
A multichannel ECG monitors all 12 leads but usually records how many leads at one time: 3 leads at one time
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.
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.
Bradycardia means: slow heart rate
Tachycardia means: fast heart rate
T/F: Lead V4 placement is the 5th intercostal space at the midclavicular line: True
Each of the 12 leads of an ECG tracing represents a single view of the heart. True
The chest (precordial) leads are the bipolar type of leads. False - the chest leads are unipolar type of leads.
The artifact filter selection is used to reduce artifacts due to muscle tremors and slight patient movement. True
Only one-time electrodes must be used with an application of gel or paste conduction material. False -
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.
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
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
Signal processing occurs inside the ECG machine, amplifying the electrical impulse and converting it into a tracing display. True
To be able to interpret the information, the ECG machine increases the size of the waveforms in leads aVR, aVL, and aVF. True
A standard 12-lead ECG uses 12 electrodes. False - it uses 10 electrodes/sensors.
Created by: lorrainel007
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