Module 3: EKG Analysis and
Interpretation Question and answers
100% correct 2026/2027
heart rate - correct answer Measurrd or estimated by reviewing the EKG tracing and using various
techniques and formulas
Most commonly used approaches in determining heart rate - correct answer The 1500 method,
sequence, and 6 second method
1500 method - correct answer Most precise and best to use with fast rhythms
How to calculate using 1500 method - correct answer Count number of small boxes between two R
waves and divide by 1500
Sequence method (300 method) - correct answer Calculates heart rate using large boxes instead of
small ones. Do not use this method with irregular rhythms
6 second method - correct answer Used routinely in estimating the rate and is useful when rhythm is
irregular
How to calculate using 6 second method - correct answer Count number of QRS complexes within 6
seconds and multiply by 10
Calculating max heart rate - correct answer Max heart rate is calculated by 220- patients age
Calculating Target Heart Rate - correct answer The percent of maximum patient should achieve. It's
common practice to use 70% to calculate patient's target heart rate
, What is a part of the five step method - correct answer The underlying rhythm
What's the first step of the five step method - correct answer Calculate both atrial and ventricular rates
Caliper - correct answer Valuable in measuring the regularity of wave forms
Second step of five step method - correct answer Measure from beginning of one wave to beginning of
the next
What is necessary to assess the regularity of the PQRS wave forms - correct answer A tracing of about 6
to 10 seconds
What does the P wave represent? - correct answer Atrial depolarization, therefore irregular intervals
can indicate atrial dysfunction
What should the P wave have throughout the tracing - correct answer A consistent shape, be positively
deflected, and occur before each QRS waveform
Last step of five step method - correct answer Document the rhythm using descriptive terminology
When does a regular rhythm occur? - correct answer When the QRS complexes are separated by the
exact same distance across the EKG tracing
How is time and voltage measured? - correct answer Time is measured horizontally and voltage is
measured vertically
QRS complex - correct answer Represents ventricular depolarization (activation).
Interpretation Question and answers
100% correct 2026/2027
heart rate - correct answer Measurrd or estimated by reviewing the EKG tracing and using various
techniques and formulas
Most commonly used approaches in determining heart rate - correct answer The 1500 method,
sequence, and 6 second method
1500 method - correct answer Most precise and best to use with fast rhythms
How to calculate using 1500 method - correct answer Count number of small boxes between two R
waves and divide by 1500
Sequence method (300 method) - correct answer Calculates heart rate using large boxes instead of
small ones. Do not use this method with irregular rhythms
6 second method - correct answer Used routinely in estimating the rate and is useful when rhythm is
irregular
How to calculate using 6 second method - correct answer Count number of QRS complexes within 6
seconds and multiply by 10
Calculating max heart rate - correct answer Max heart rate is calculated by 220- patients age
Calculating Target Heart Rate - correct answer The percent of maximum patient should achieve. It's
common practice to use 70% to calculate patient's target heart rate
, What is a part of the five step method - correct answer The underlying rhythm
What's the first step of the five step method - correct answer Calculate both atrial and ventricular rates
Caliper - correct answer Valuable in measuring the regularity of wave forms
Second step of five step method - correct answer Measure from beginning of one wave to beginning of
the next
What is necessary to assess the regularity of the PQRS wave forms - correct answer A tracing of about 6
to 10 seconds
What does the P wave represent? - correct answer Atrial depolarization, therefore irregular intervals
can indicate atrial dysfunction
What should the P wave have throughout the tracing - correct answer A consistent shape, be positively
deflected, and occur before each QRS waveform
Last step of five step method - correct answer Document the rhythm using descriptive terminology
When does a regular rhythm occur? - correct answer When the QRS complexes are separated by the
exact same distance across the EKG tracing
How is time and voltage measured? - correct answer Time is measured horizontally and voltage is
measured vertically
QRS complex - correct answer Represents ventricular depolarization (activation).
