Calculations Flashcards
(18 cards)
What is the Little Block Method used for?
Counting the number of small boxes between two R waves.
How is the heart rate calculated using the Big Block Method?
Heart Rate = 300 / Number of large boxes.
What is the Triplicate Method in heart rate calculation?
Start counting from an R wave that begins on a thick line to the next R wave and memorize the sequence of numbers.
300-150-100-75-60-50-43-37-33
How do you calculate heart rate using the 6 Second Method?
Multiply the number of R waves in a 6-second strip by 10 or in a 10-second strip by 6.
What is the first step in the 8 Steps for ECG Analysis?
Assess Rhythm Regularity by measuring R-R intervals for regularity.
When calculating heart rate for irregular rhythms, which method should be used?
Use the 6-second method.
What does a 1:1 P:QRS ratio suggest?
Sinus rhythms.
What does a prolonged PRI indicate?
AV Block.
What does a shortened PRI suggest?
An accessory pathway.
What does a wide QRS suggest?
Ventricular origin or Bundle Branch Block (BBB).
What does a narrow QRS indicate?
Supraventricular rhythm.
What is the purpose of determining the axis in ECG analysis?
To follow a step-by-step approach for axis determination.
Which leads are used to examine for atrial enlargement?
Leads II and V1.
What should be checked for ventricular enlargement?
Left Ventricular Hypertrophy (LVH) and Right Ventricular Hypertrophy (RVH).
What is the significance of checking for ischemia or infarction?
To exclude lead aVR and check others for ST changes or T wave inversion.
What does the complete interpretation summarize?
Underlying rhythm, heart rate, and abnormalities.
Fill in the blank: The formula for heart rate using the Big Block Method is Heart Rate = 300 / Number of _______.
large boxes.
True or False: Variations in P waves can indicate different arrhythmias.
True.
