RELIAS DYSRHYTHMIA BASIC A&B TESTBANK ||
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2nd Degree Heart Block (Mobitz II) - ANSWER: Rare, but more serious
Sudden appearance of a nonconducted P-wave
P-waves are nl, but some aren't followed by a QRS complex
PR & RR intervals are constant
2nd degree heart block type 1 (Wenkebach) - ANSWER: progressively longer PR
interval until the P wave is not followed by a QPR
3rd degree heart block - ANSWER: no obvious correlation between p and qrs,
need pace maker
Accelerated Idioventricular Rhythm - ANSWER: Rate: 50 - 100 usually (usually
slow)
P wave: Obscured by ventricular waves (occur during ventricular contraction) - SA
node slower than faster ventricular pacing than should be
QRS: Wide QRS
Conduction: Ventricular only
Rhythm: Regular
- Benign rhythm that is sometimes seen during acute MI or early after reperfusion.
- Rarely sustained, does not progress to vfib, rarely requires treatment
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Asystole - ANSWER: absence of contractions of the heart
Atrial Fibrillation (A-Fib) - ANSWER: an irregular and often very fast heart rate
originating from abnormal conduction in the atria
Atrial Flutter - ANSWER: irregular beating of the atria; often described as "a-
flutter with 2 to 1 block or 3 to 1 block"
Atrial paced rhythm - ANSWER: spike before P wave
Bigeminy PVC - ANSWER: every other beat is a PVC
Failure to capture (pacemaker) - ANSWER:
Failure to sense (pacemaker) - ANSWER:
First degree heart block - ANSWER: atrioventricular (AV) block in which the
atrial electrical impulses are delayed by a fraction of a second before being
conducted to the ventricles
Idioventricular Rhythm - ANSWER: <40
*looks like vtach but slow*
- No P waves (from vent foci)
- Wide QRS
(Serious, death like rhythm)
- called "dying heart" rhythm...occasional ventric beat b4 death (asystole)
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Junctional Rhythm - ANSWER: 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)
Junctional Tachycardia - ANSWER: >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
Monomorphic ventricular tachycardia - ANSWER: presents with wide QRS
complexes of a common shape.
Normal sinus rhythm - ANSWER: heart rhythm originating in the sinoatrial node
with a rate in patients at rest of 60 to 100 beats per minute
Premature Atrial Contraction (PAC) - ANSWER: 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
Premature Junctional Contraction - ANSWER: Inverted p wave or hidden p wave
PRI<0.12 or none
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Normal QRS
premature ventricular contraction (PVC) - ANSWER: a ventricular contraction
preceding the normal impulse initiated by the SA node (pacemaker)
PVC couplets - ANSWER: PVC occurring in pairs, no adequate C.O. when this
occurs
Sinus Arrest/Pause - ANSWER: - 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)
Sinus Arrhythmia - ANSWER: Appearance is ALMOST NORMAL:
Respiratory - Circulatory interaction
Rate INCREASES with INSPIRATION (IN=IN)
Sinus Bradycardia - ANSWER: <60
normal sinus rhythm
Sinus Tachycardia - ANSWER: >100 (100-150)
normal sinus rhythm
Supraventricular Tachycardia (SVT) - ANSWER: an abnormal heart rhythm
arising from aberrant electrical activity in the heart; originates at or above the AV
node
Torsades de pointes - ANSWER: Rate: 120 - 200 usually