NUR 254 Cardiac Dysrhythmias

NUR 254 Cardiac Dysrhythmias

• What does the p wave measure?

Answer Depolarization and contraction of the atria (problem with p wave is problem with the atria)

• What is the PR interval measuring? Where is it measured from?

Answer Time it is taking from SA impulse to purkinje fibers (time it takes for atrium to squeeze blood into ventricles) - From P to Q

• What does the QRS complex measure?

Answer Depolarization and contraction of the ventricles

• What is the normal for the ST segment? What does it mean if it's elevated or depressed?

Answer

• Has to be the same level as the isoelectric line

• If elevated = infarct
• If depressed = injury

• What does theT wave measure?

Answer Repolarization of the ventricles (inverted with injury; peaked with hyperkalemia)

• (T/F) A heart block is a physical blockage.

Answer False (It's a block in conduction)

• Where do you count from to tell if it's a regular rhythm? 1 / 2

Answer R to R

• What is the normal duration for PR interval?

Answer 0.12 - 0.2 seconds

• What is the normal duration for the QRS complex?

Answer 0.06 - 0.1 seconds

• What is the normal duration for QT interval?

Answer 0.32 - 0.44 seconds

• What is the biggest concern with dysrhythmias?

Answer Cardiac output (some do not effect this profoundly and just need to be monitored instead of intervened)

• Sinus arrhythmia.

Answer

• (T/F) There needs to be intervention for sinus arrhythmia.

Answer False (nothing needs to be done)

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