INSTRUCTIONS: The following questions are to be answered by writing the answer in the space provided. After you have completed all the questions, scroll down to “Answers” at the end of the lesson and check your responses.
1. When you are calculating regular rhythms, the most accurate method is to count the number of small squares between _____________________ and divide that number into 1500.
2. The rate for irregular rhythm is based on the ______________ strip method.
3. In atrial polarization, the P waves seen on the oscilloscope indicate ___________________________________ deflections. (small or large) (positive or negative)
4. Q waves occurring on the oscilloscope are ____________________ deflections.
5. The rhythm for sinus bradycardia is __________________ with the PR intervals ___________________ and the PP intervals _________________________.
6. The casualty’s heartbeat rhythm is regular (RRI and PPI are constant). The atrial and ventricular waves are equal to or greater than 100 beats per minute. The P wave is uniform with one P wave appearing in front of every QRS complex. The P-R interval is constant between 0.12 and 0.20 seconds. The QRS measures less than 0.12 seconds. Which cardiac dysrhythmia is the casualty suffering from?
_______________________________________________
7. In the case of atrial rhythms, the sinus node loses its pacemaking role, and the site with the ________________________________ becomes the pacemaker.
8. A single focus in the atria fires very rapidly and overrides the SA node. The name of this atrial rhythm is _________________________________.
9. Premature junctional contraction (PJC) occurs when a small region of the heart becomes _____________________________________.
10. What is the general cause of heart blocks? ______________________________
11. A premature ventricular contraction (PVC) is a single ectopic heartbeat which comes earlier than expected and _________________________ the regularity of the underlying rhythm of the heart.
12. A characteristic of ventricular fibrillation (VF) is that the ventricles of the heart fire in a ______________ instead of beating, the ventricular muscle _____________.
13. Another name for cardiac standstill is _______________________________.
14. List five atrial rhythms dealt with in this lesson.
a. _______________________________________.
b. _______________________________________.
c. _______________________________________.
d. _______________________________________.
e. _______________________________________.
ANSWERS TO QUESTIONS, LESSON 1
1. Two R waves. (para 1-6b(l)(a))
2. Six second. (para 1-6b(2))
3. Small. Positive. (para 1-5c(l))
4. Negative. (para 1-5d(2))
5. Regular. Constant. Constant. (para 1-7b(l))
6. Sinus tachycardia. (para 1-7c)
7. Fastest rate. (para 1-8a)
8. Atrial tachycardia (AT). (para 1-8d)
9. More excitable than normal. (para 1-9b(1))
10. Conduction disturbances at the AV node. (para 1-10a)
11. Interrupts. (para 1-11b(1)
12. Totally disorganized. Quivers. (para 1-11d(2))
13. Asystole. (para 1-12b)
14. Wandering pacemaker.
Premature atrial contractions (PACs).
Atrial tachycardia.
Atrial flutter.
Atrial fibrillation.
(paras 1-8b through f)