Deck 4: Heart Rate

Question 1

The first step in analyzing an ECG rhythm is to:

A) determine the heart rate.
B) examine the P waves.
C) evaluate the QRS complexes.
D) determine the regularity.

Answer 1

determine the heart rate.

Question 2

Which of the following is the best method for calculating the heart rate in an irregular rhythm?

A) 6-second interval x 10 method
B) 300, 150, 100, 75, 60, 50 method
C) 1,500 method
D) rate calculator

Answer 2

6-second interval x 10 method

Question 3

To calculate the heart rate using the 6-second interval x 10 method:

A) count the number of large squares in a six second portion of the ECG tracing and multiply that number by the number of QRS complexes found in that same section of the ECG tracing
B) count the number of small squares between two consecutive R waves and divide 1,500 by that number
C) find the peak of an R wave that falls on a bold line, then locate the next consecutive R wave and determine the value of line to which it is closest.
D) multiply by 10 the number of QRS complexes found in a six second portion of the ECG tracing

Answer 3

multiply by 10 the number of QRS complexes found in a six second portion of the ECG tracing

Question 4

You are using the 6-second interval x 10 method to assess an ECG tracing. You note there are 3 QRS complexes in a six second portion of the ECG tracing. This patient's heart rate is ___ beats per minute.

A) 30
B) 60
C) 90
D) 120

Question 5

The patient whose heart rate is identified in question 6 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 6

You are using the 6-second interval x 10 method to assess an ECG tracing. You note there are 9 QRS complexes in a six second portion of the ECG tracing. This patient's heart rate is ___ beats per minute.

A) 60
B) 90
C) 110
D) 120

Question 7

The patient whose heart rate is identified in question 8 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 8

You are using the 6-second interval x 10 method to assess an ECG tracing. You note there are 18 QRS complexes in a six second portion of the ECG tracing. This patient's heart rate is ___ beats per minute.

A) 90
B) 120
C) 150
D) 180

Question 9

The patient whose heart rate is identified in question 10 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 10

You are using the 6-second interval x 10 method to assess an ECG tracing. You note there are 22 QRS complexes in a six second portion of the ECG tracing. This patient's heart rate is ___ beats per minute.

A) 112
B) 122
C) 180
D) 222

Question 11

The patient whose heart rate is identified in question 12 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 12

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly on the 4th bold line. This patient's heart rate is ______ beats per minute.

A) 150
B) 100
C) 75
D) 60

Question 13

The patient whose heart rate is identified in question 14 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 14

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly on the 3rd bold line. This patient's heart rate is ______ beats per minute.

A) 150
B) 100
C) 75
D) 60

Question 15

The patient whose heart rate is identified in question 16 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 16

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly on the 6th bold line. This patient's heart rate is ______ beats per minute.

A) 100
B) 75
C) 60
D) 50

Question 17

The patient whose heart rate is identified in question 18 has a ________ rate.

A) bradycardic
B) normal
C) tachycardic

Question 18

You are using the 300, 150, 100, 75, 60, 50 method to determine the heart rate. You locate an R wave that falls on a bold line on the ECG paper. The next consecutive R wave after your starting points falls directly between the second and third bold line on the ECG paper. This patient's heart rate is approximately______ beats per minute.

A) 180
B) 125
C) 80
D) 50

Question 19

In which method do you count the number of small squares between two consecutive R waves?

A) 1500 method
B) 300, 150, 100, 75, 60, 50 method
C) calculator method
D) 6-second interval x 10 method

Question 20

Which method of determining the heart rate is the least accurate?

A) 1500 method
B) 6-second interval x 10 method
C) 300, 150, 100, 75, 60, 50 method
D) calculator method

Question 21

Heart rates above _____ beats per minute in the adult are considered abnormal.

A) 70
B) 86
C) 92
D) 100

Question 22

Heart rates below _____ beats per minute in the adult are considered abnormal.

A) 60
B) 74
C) 88
D) 96

Question 23

You are using the 1500 method to determine the heart rate. You count the number of small squares between two consecutive R waves and determine there are 15. This patient's heart rate is ______ beats per minute.

A) 50
B) 100
C) 150
D) 300

Question 24

You are using the 1500 method to determine the heart rate. You count the number of small squares between two consecutive R waves and determine there are 30. This patient's heart rate is ______ beats per minute.

A) 50
B) 100
C) 150
D) 300

Question 25

A slow heart rate results in there being less distance between consecutive R waves.

Question 26

The 300, 150, 100, 75, 60, 50 method can be used to determine the ventricular heart rate but not the atrial rate.

Question 27

When counting the heart rate it is important to count both the atrial and ventricular rates.

Question 28

Both extremely slow and fast heart rates can result in decreased cardiac output.