EKG

Question 1

What does the 12 lead EKG provide?

Answer 1

Information on the HT electrical activity in 3 directions: 1. R-L, 2. Superior/Inferior, 3. Anterior/Posterior

Question 2

What a re 4 major classifications of HT arrhythmias?

Answer 2

1. Sinus, 2. Atrial, 3. Ventricular, 4. Junctional

Question 3

What are 3 major variances to EKG wave forms ?

Answer 3

1. Ischemia (L.O. oxigen), 2. Injury (Prolonged ischemia), 3. Infarction (death of tissue)

Question 4

What is standard calibration for EKG machine sensitivity?

Answer 4

10 mm/mv ( 10mm height/5 mm width)

Question 5

12 Lead (Non-Holter Monitor) placement for last 6 leads:

Answer 5

1. V-1 4th Intercost. @ R. Sternal border, 2. V-2 4th interc. @ L. sternal border, 3. V-3 1/2 way bet. V2 and V4, 4. V4 5th intercost. @ L. midclav. 5. V5 on horiz. line w/V4. 6. V6 horiz line w/V3.

Question 6

The amplitude of a wave is determined by using what?

Answer 6

The number of small boxes between the lowest and highest points of a wave.

Question 7

What are 3 things measured in the HT in an EKG (or ECG).

Answer 7

1.Electrical potential. 2. Electrical Depolarization, 3. Rate, rhythm and size of HT chambers.

Question 8

What are 4 possible causes of a Wandering baseline?

Answer 8

1.Movement, 2.Muscle tremor, 3. Ambulance start/stop, 4. Cellphones/electrical equipment.

Question 9

What are 3 things to inspect the waveforms of a cardiac cycle for?

Answer 9

1. symmetry (T+P waves), 2. Direction (Pos/neg), 3.Amplitude (low/high)

Question 10

To determine the direction of a wave form deflection, you look at what 2 things?

Answer 10

1. Positive Deflection ( a wave above the isoelectric line), 2. negative Deflection (below)

Question 11

5 Step Method to Measure a patients HT rhythm from EKG:

Answer 11

1. Calculate HT rate, 2.Measure the PR interval, 3. Measure the QRS duration. 4. Determine: Regular, Irregular or Irregularly irregular., 5. Use findings to interpret the underlying rhythm.

Question 12

What is the 6 Second Method for calculating patient HT rate on an EKG? (3 steps)

Answer 12

1. Count the # of R. waves in a 6 second strip. 2. Multiply by 10. 3. Answer is BPM rate.

Question 13

What is the GOLD STANDARD for calculating irregular HT rhythms ?

Answer 13

The 6 Second Rule (Method).

Question 14

Holter (Telemetry) Monitor colors are:

Answer 14

RA (White), LA (Black), RL (Red), LL (Green) Center (Brown)

Question 15

How do you calculate the HT Rate using the 1,500 Method? (3 steps)

Answer 15

1. Count sm. boxes between R-R intervals., 2. Divide 1,500 by that #. 3. Answer is the ventricular rate or BPM.

Question 16

R to R interval reflects the __________ rate

Answer 16

Ventricular

Question 17

P-P Interval calculates the ________rate

Answer 17

Atrial

Question 18

What is the exception for using the 300 Method (sequencing) for calculating HT rate?

Answer 18

Irregular Rhythms

Question 19

The 300 Method (sequencing) for calculating Ht rate is;

Answer 19

1. Count 300 (large) boxes per min. of EKG. 2. Use this pattern: 300-150-100-75-60-50 3. Divide 300 by # of boxes bet. QRS. 4. Every box counter to R. apply one of these #’s

Question 20

What is the pattern of Number to memorize for the 300 Method (sequencing)?

Answer 20

300-150-100-75-60-50

Question 21

What is the 1,500 method of calculating HT rate best used for?

Answer 21

For fast rhythms

Question 22

What are the 3 methods of calculating HT rate from the EKG?

Answer 22

1. The 1,500 Method, 2. The sequencing Method (300 Method), 3. The 6 Second rule (Method)