Normal Size Small Size show me how
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?
|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:
|The gain control is normally set at:
|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:
|The usual setting for the artifact filters is:
|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:
|The ECG graph paper represents time _________ and ________ vertically.
|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?
|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:
|When using the 6-second method calculation, you must locate 6 seconds on a rhythm strip, count the number of complexes, and multiply by:
|The heart rate method producing the most accurate with regular rhythms is the:
|The best source to obtain specific info to perform an ECG with accuracy is to refer to the machine's:
|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.
|slow heart rate
|fast heart rate
|T/F: Lead V4 placement is the 5th intercostal space at the midclavicular line:
|Each of the 12 leads of an ECG tracing represents a single view of the heart.
|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.
|Only one-time electrodes must be used with an application of gel or paste conduction material.
|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.
|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.
|Signal processing occurs inside the ECG machine, amplifying the electrical impulse and converting it into a tracing display.
|To be able to interpret the information, the ECG machine increases the size of the waveforms in leads aVR, aVL, and aVF.
|A standard 12-lead ECG uses 12 electrodes.
|False - it uses 10 electrodes/sensors.