TEST BANK For ECGs Made Easy, 7th Edition by
Barbara J Aehlert, All Chapters 1 - 10
what is lead 1 on ECG ? - ANSWER - electrode are attached to the right and the left
arm
- lead one is positive as the current is travelling from the right to the left arm, the
same direction of the conduction of the heart
what is lead 2 on ECG ? - ANSWER - electrode are attached to the right arm and the
left leg
- is positive as current travelling in same direction as heart conduction
what is lead 3 on ECG? - ANSWER - between the left arm and left leg
- should have a positive p wave but negative QRS
What is left axis deviation? - ANSWER - lead one is positive
- lead two is middling/negative
- lead three is negative
what is right axis deviation ? - ANSWER - lead one is negative
- lead two is normal
- lead three is positive
what can cause left axis deviation ? - ANSWER - early conduction disease
- myocardial infarction
- atrial septal defect
- obesity
what can cause right axis deviation ? - ANSWER - myocardial infarction
- right ventricular strain
what 6 things do you check on ECG ? - ANSWER - is the rhythm regular ?
- is the rate fast or slow ?
- is the axis in lead 1 and 2 positive ?
- is there one p wave for every QRS complex ?
- is there any ST elevation or depression ?
- check intervals
how do you work out heart rate on ECG ? - ANSWER - count the number of r spikes
and x6 as this measures a 10 second interval so x6 to get 60 seconds
what shows a normal rhythm on ECG ? - ANSWER - normal looking P waves
- always followed by a QRS complex
- in a regular fashion
What is an atrial flutter? - ANSWER - In atrial flutter, the atrial waves are so rapid
that the AV node is unable to respond until the second, third, or fourth wave it
receives, resulting in a saw-toothed baseline appearance.
Barbara J Aehlert, All Chapters 1 - 10
what is lead 1 on ECG ? - ANSWER - electrode are attached to the right and the left
arm
- lead one is positive as the current is travelling from the right to the left arm, the
same direction of the conduction of the heart
what is lead 2 on ECG ? - ANSWER - electrode are attached to the right arm and the
left leg
- is positive as current travelling in same direction as heart conduction
what is lead 3 on ECG? - ANSWER - between the left arm and left leg
- should have a positive p wave but negative QRS
What is left axis deviation? - ANSWER - lead one is positive
- lead two is middling/negative
- lead three is negative
what is right axis deviation ? - ANSWER - lead one is negative
- lead two is normal
- lead three is positive
what can cause left axis deviation ? - ANSWER - early conduction disease
- myocardial infarction
- atrial septal defect
- obesity
what can cause right axis deviation ? - ANSWER - myocardial infarction
- right ventricular strain
what 6 things do you check on ECG ? - ANSWER - is the rhythm regular ?
- is the rate fast or slow ?
- is the axis in lead 1 and 2 positive ?
- is there one p wave for every QRS complex ?
- is there any ST elevation or depression ?
- check intervals
how do you work out heart rate on ECG ? - ANSWER - count the number of r spikes
and x6 as this measures a 10 second interval so x6 to get 60 seconds
what shows a normal rhythm on ECG ? - ANSWER - normal looking P waves
- always followed by a QRS complex
- in a regular fashion
What is an atrial flutter? - ANSWER - In atrial flutter, the atrial waves are so rapid
that the AV node is unable to respond until the second, third, or fourth wave it
receives, resulting in a saw-toothed baseline appearance.
