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10 Cards in this Set
- Front
- Back
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What is the significance of a wide QRS?
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origin of rhythm is likely ventricular (spreads more slowly)
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How do you distinguish between a ventricular and supraventricular arrhythmia?
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P waves and narrow QRS: supraventricular
no P waves, wide QRS: ventricular |
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How can you distinguish an atrial premature beat?
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timing and contour
timing: occurs too early contour: different from the other P waves |
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How can you distinguish a junctional premature beat?
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usually no visible P wave
sometimes a retrograde P wave |
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What are the five types of sustained SVTs?
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PSVT (AV nodal reentrant tachycardia)
atrial flutter atrial fibrillation MAT PAT (paroxysmal atrial tachycardia) or ectopic atrial tachycardia |
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Characteristics of PSVT
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absolutely regular rhythm, 150-250
narrow QRS buried retrograde P waves ("pseudo R prime" in V1); these are usually inverted |
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pseudo R prime
which lead? what does it mean? |
sign of PSVT
seen in V1 |
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How do you stop a PVST?
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Valsalva, carotid massage, ice in face, etc.
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What should you always do before carotid massage, especially in elderly?
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auscultate for carotid bruits
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Which side is usually more successful for carotid massage?
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right side
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