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ECG Review
ECG/EKG Final Review
| Question | Answer |
|---|---|
| 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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