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NURS 3730 Exam 3 Questions and Correct
Answers/ Latest Update / Already Graded
Normal K+ level
Ans: 3.5-5.0
Effects of hyperkalemia on an EKG
Ans: - P-waves are widened & of low amplitude due to slowing
of conduction
- QRS complex (widens, fusion of QRS-T, loss of ST segment)
- Tall tented T waves
Hyperkalemia EKG
Ans:
Effects of hypokalemia on an EKG
Ans: - ST depression & flattening of the T wave
- Negative T waves
- A U-wave may be visible
Hypokalemia EKG
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Ans:
Normal calcium level
Ans: 8.4-10.5
Effects of hypercalcemia on an EKG
Ans: - Shortened QRS
- Low R wave
- Disappearance of P waves
- Tall, peaking T waves
Effects of hypocalcemia on an EKG
Ans: - Prolongation of the QT-interval
- T wave flattening & inversion
- Prolonged ST & ST-depression
Premature Atrial Complex
Ans: - NOT sinus rhythm because this rhythm is not initiated by
the SA node
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- Another cell generates an electrical impulse & it traveled a
similar pathway because the QRS complexes look the same, so
the rhythm happened normally when it got to the AV node
- Patient will complain of irregular heart beat
Causes of premature atrial complex
Ans: - Caffeine
- Stress
- Fatigue
Treatment for premature atrial complex
Ans: - Reduce modifiable risk factors & follow-up
Atrial flutter
Ans: - Sawtooth appearance
- 3 P-waves to 1 QRS
- The atria depolarizes (contracts) 3 times for every 1 time the
ventricles depolarize (contract)
Causes of atrial flutter
Ans: - Coronary artery disease
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- HF
- Problem with conduction from the SA node to the AV node
(AV node says they are going to respond regularly bc if the AV
node response to every SA impulse, the HR would be insane; so
the AV node says "I'm only responding to every 3 impulses")
- Valvular disorder
- Some type of damage or irritation to the atria
Risks assoc. with atrial flutter
Ans: - A-fibb because the atria are working too hard
Do we need to report atrial flutter?
Ans: DUH
Treatment for atrial flutter
Ans: - Beta-blockers/calcium-channel blockers
- Meds may not fix this, so if they don't, the reason is ec topic
focus
- With ectopic focus, they ablate the cells to prevent them from
continuing to mess up the rhythm
- Cardioversion (electricity vs. chemical-meds)
- Defribillation
All rights reserved © 2025/ 2026 |
NURS 3730 Exam 3 Questions and Correct
Answers/ Latest Update / Already Graded
Normal K+ level
Ans: 3.5-5.0
Effects of hyperkalemia on an EKG
Ans: - P-waves are widened & of low amplitude due to slowing
of conduction
- QRS complex (widens, fusion of QRS-T, loss of ST segment)
- Tall tented T waves
Hyperkalemia EKG
Ans:
Effects of hypokalemia on an EKG
Ans: - ST depression & flattening of the T wave
- Negative T waves
- A U-wave may be visible
Hypokalemia EKG
All rights reserved © 2025/ 2026 |
, Page |2
Ans:
Normal calcium level
Ans: 8.4-10.5
Effects of hypercalcemia on an EKG
Ans: - Shortened QRS
- Low R wave
- Disappearance of P waves
- Tall, peaking T waves
Effects of hypocalcemia on an EKG
Ans: - Prolongation of the QT-interval
- T wave flattening & inversion
- Prolonged ST & ST-depression
Premature Atrial Complex
Ans: - NOT sinus rhythm because this rhythm is not initiated by
the SA node
All rights reserved © 2025/ 2026 |
, Page |3
- Another cell generates an electrical impulse & it traveled a
similar pathway because the QRS complexes look the same, so
the rhythm happened normally when it got to the AV node
- Patient will complain of irregular heart beat
Causes of premature atrial complex
Ans: - Caffeine
- Stress
- Fatigue
Treatment for premature atrial complex
Ans: - Reduce modifiable risk factors & follow-up
Atrial flutter
Ans: - Sawtooth appearance
- 3 P-waves to 1 QRS
- The atria depolarizes (contracts) 3 times for every 1 time the
ventricles depolarize (contract)
Causes of atrial flutter
Ans: - Coronary artery disease
All rights reserved © 2025/ 2026 |
, Page |4
- HF
- Problem with conduction from the SA node to the AV node
(AV node says they are going to respond regularly bc if the AV
node response to every SA impulse, the HR would be insane; so
the AV node says "I'm only responding to every 3 impulses")
- Valvular disorder
- Some type of damage or irritation to the atria
Risks assoc. with atrial flutter
Ans: - A-fibb because the atria are working too hard
Do we need to report atrial flutter?
Ans: DUH
Treatment for atrial flutter
Ans: - Beta-blockers/calcium-channel blockers
- Meds may not fix this, so if they don't, the reason is ec topic
focus
- With ectopic focus, they ablate the cells to prevent them from
continuing to mess up the rhythm
- Cardioversion (electricity vs. chemical-meds)
- Defribillation
All rights reserved © 2025/ 2026 |
