Basic Dysrhythmia-Relias |29 Questions| With
Correct Answers.
1). Normal sinus rhythm
Ans: heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60
to 100 beats per minute
2). Sinus arrhythmia
Ans: Appearance is ALMOST NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN)
3). Sinus bradycardia
Ans: <60
normal sinus rhythm
4). Sinus tachycardia
Ans: >100 (100-150)
normal sinus rhythm
5). Premature atrial contraction (pac)
Ans: Heart Rate: Depends on underlying rhythm
Regularity: Interrupts the regularity of underlying rhythm
P-Wave: can be flattened, notched, or unusual. May be hidden within the T wave
PRI: measures between .12-.20 seconds and can be prolonged; can be different from
other complexes
QRS: <.12 seconds
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, 6). Sinus arrest/pause
Ans: - SA node doesn't fire
- notice absence of P-wave for a complete cycle (a missed cycle)
length of pause ≠ multiple of normal rate (block)
7). Atrial fibrillation (a-fib)
Ans: an irregular and often very fast heart rate originating from abnormal conduction in
the atria
8). Atrial flutter
Ans: irregular beating of the atria; often described as "a-flutter with 2 to 1 block or 3 to
1 block"
9). Junctional rhythm
Ans: 40-60 Regular!
-impulse from AV node w/ retro/antegrade transmission
- P wave often inverted/buried/follow QRS
- slow rate
- narrow QRS (not wide like ventricular)
10). Junctional tachycardia
Ans: >60 bpm (ms. K; 150-250)
- KEY: will be regular (consistent)
- AV junction produces a rapid sequence of QRS-T cycles
- p-wave often inverted/buried/follow QRS
11). Premature junctional contraction
Ans: Inverted p wave or hidden p wave
PRI<0.12 or none
Normal QRS
12). Supraventricular tachycardia (svt)
Ans: an abnormal heart rhythm arising from aberrant electrical activity in the heart;
originates at or above the AV node
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