ADN 520 - EKG and CAD Questions with 100% Correct Answers

ADN 520 - EKG and CAD Questions
with 100% Correct Answers
SA Node Correct Answer: - Pacemaker of the heart


- Controls contraction of the atria


AV Node Correct Answer: - Secondary pacemaker


- Controls contraction of the ventricles


Systole/Diastole Correct Answer: - Systole = contraction


- Diastole = relaxation


Depolarization Correct Answer: Contraction of the heart


Repolarization Correct Answer: Relaxation of the heart


P Wave Correct Answer: - Firing of the SA node


- Atrial depolarization


PR Segment Correct Answer: - Time interval from end of atrial depolarization to
beginning of ventricular depolarization


QRS Complex Correct Answer: - Ventricular depolarization and atrial
repolarization


ST Segment Correct Answer: - The time which ventricles are contracting and
emptying


T Wave Correct Answer: - Ventricular repolarization

, TP Interval Correct Answer: - Time during ventricular relaxation and filling


Sinus Tachycardia Correct Answer: - HR: > 100 bpm


- P Wave: Present


- PR Interval: Present


- QRS: present, regular


- Usually the waves are just closer together on the strip because the heart is
beating so fast


Causes of Sinus Tachycardia Correct Answer: - Stimulants, exercise


- Anxiety, fear, pain


Treatment of Sinus Tachycardia Correct Answer: - Treat underlying cause: e.g.
pain or fear


- Adenosine


Sinus Bradycardia Correct Answer: - HR: <60 bpm


- P Wave: Present


- PR Interval: Present


- QRS: Present


- Usually the waves are just more spread out from slow beating heart


Causes of Sinus Bradycardia Correct Answer: - Sinus node dysfunction