Lecture 8 - Arrhythmias Flashcards Preview

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Flashcards in Lecture 8 - Arrhythmias Deck (12):
1

Sinus bradycardia is defined as a HR

Under 60 BPM

2

Heart rate is increased by approximately 10 BPM for every _____ increase in *F of body temperature.

1

3

Explain SNS mediated tachycardia.

Due to blood loss or other shock states, the SNS attempts to maintain perfusion/B.P. by releasing catecholamines, which produce tachycardia

4

Explain the almost constant stroke volume in endogenously mediated sinus tachycardia.

Due to catecholamines, contractility is increased; skeletal muscle pump also increases venous return to the heart

5

Explain the decreased cardiac output in pathologically induced tachycardia.

Decreased blood volume; lack of skeletal muscle pump decreases preload (often, ill people aren't moving around)

6

Explain physiology of respiratory induced sinus arrhythmia.

The respiratory control centers in the medulla lie next to the cardiac vasomotor centers. With deep inspiration, there is "spillover," which changes heart rate.

7

Sinus tachycardia is defined as a heart rate greater than _____

100 BPM

8

Rhythm?

Q image thumb

Sinus bradycardia

9

Rhythm?

Q image thumb

Sinus tachycardia

10

Rhythm?

Q image thumb

2*, Type I

 

Progressive PRI until dropped beat

11

Rhythm?

Q image thumb

2* Type II

 

Multiple dropped beats

12

Rhythm?

Q image thumb

3* block

 

Complete dissociation of SA/AV

Regular P-P interval

Regular R-R interval

No 1:1 P:QRS