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Flashcards in What rhythm is expected? Deck (19)
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1
Q

This rhythm is common in athletes and usually requires no treatment

A

sinus bradycardia

2
Q

When is atropine useful for treating sinus bradycardia?

A

atropine is useful in the context of intense vagal activation- fainting

3
Q

What rhythm often occurs with small inferior wall infarctions which increase vagal tone?

A

sinus bradycardia

4
Q

what rhythm is associated with “sick sinus syndrome”?

A

sinus bradycardia

5
Q

What abnormal rhythm is associated with some P waves conducting normally to the ventricles and some P waves not?

A

2nd degree AV block

6
Q

In what subtype does the PR lengthen until a P does not conduct?

A

mobitz type 1

7
Q

in what subtype is no change in PR observed?

A

mobitz type 2

8
Q

What rhythm is associated with AV node or junctional failure with aging, infarct, or disruption during cardiac surgery?

A

3rd degree AV block

9
Q

what rhythms are associated with increased risk of embolic stroke due to clot in the left atrium?

A

atrial flutter and fibrillation

10
Q

What is the mechanism of self termination of arrhythmias and what happens when this goes wrong?

A

Self Termination: depolarization at a junction usually meets tissue which has already been depolarized and is therefore refractory to reentry

Dysfunction: if chamber dilation or islands of fibrosis create a long circuitous path, depolarization can continue to find non-refractory myocardium and be sustained

11
Q

what rhythm is terminated with adenosine infusion?

A

atrial tchycardia

12
Q

In what rhythm are p waves often not seen or is seen but inverted?

A

junctional rhythm

p waves not seen because they are burred within the QRS complex or occur very shorty before or after QRS

Often inverted because they are conducted upward from the av node rather than downward from the sinus node

13
Q

what rhythm exhibits an ectopic ventricular focus

A

premature ventricular contraction

conducted by sow myocardium- not purkinje

14
Q

what rhythm is associated with short path length that blocks re-entry?

A

premature ventricular contraction

15
Q

What two arrhythmias are noticed at rest and why?

A

premature atrial contraction & premature ventricular contraction

low heart rates allow skipped beats
at times of rest, awareness increases because distractions decrease

16
Q

In what two arrhythmias are occasional early QRS complexes present?

A

atrial premature beats & ventricular premature beats

17
Q

In what two arrhythmias are very fast, abnormal P waves present?

A

atrial flutter & atrial tachycardia

18
Q

In what three arrhythmias are there no p waves but QRS complexes present?

A

atrial fibrillation & junction rhythm & ventricular tachycardia

19
Q

In what two arrhythmias are there no p waves and no QRS?

A

ventricular fibrillation & asystole