EKG Review

What is the normal interval time for the QRS complex?

• 0.04 seconds only

• Greater than 0.12 seconds

• 0.04-0.10 seconds (1-2.5 small boxes)

• 5 large boxes

What is a normal QT interval

• 0.35-0.45 seconds (or less than 1/2 of the R-R interval)

• 2 small boxes (0.08 seconds)

• 3 small boxes (0.12 seconds)

• 6 seconds

How can you find the heart rate and a 6 second EKG strip?

• Count each P wave and multiply by 100

• Count the R waves (each QRS complex) and multiply by 10

• Total the number of ST segments

• Multiply the QRS interval time by 2

How to calculate 1500 (small box method)

• Count small boxes between R waves. Divide by 1500

• Count all R waves and multiply by 10

• Count all large boxes on strip

• Count all large boxes on strip and divide by 1500

How to calculate 300 (large block sequence) method

• Find R wave that lands on line; count large boxes to the right.

  Divide by 300

• Count small boxes on entire strip

• Count small boxes between R waves. Divide by 1500

• Count all R waves and multiply by 10

What makes a rhythm first degree AV block?

• Atrial Pacemaker

• Sinus Bradycardia

• Hear rate less than 60

• PR interval greater than .20 seconds (over 5 small boxes)

• Sinus Bradycardia

• Sinus Tachycardia

• Sinus Dysrhythmia

• Norma Sinus Rhythm

• Sinus Arrest

• Sinus Bradycardia

• Sinus Tachycardia

• Sinus Dysrhythmia

• Norma Sinus Rhythm

• Sinus Arrest

• Sinus Bradycardia

• Sinus Tachycardia

• Sinus Dysrhythmia

• Norma Sinus Rhythm

• Sinus Arrest

Tags

NGSS.HS-LS1-3

• Sinus Bradycardia

• Sinus Tachycardia

• Sinus Dysrhythmia

• Norma Sinus Rhythm

• Sinus Arrest