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nurs 221 final > Antidysrhythmic Meds > Flashcards

Antidysrhythmic Meds Flashcards

1
Q

Why cardiac dysrhythmias occur

A

Automaticity:
Decreased = S Brady
Increased = S Tachy

Conductivity:
A block or delay

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2
Q

Antidysrhythmics uses depend on what?

A

Is this a new pattern for pt

Dysrhythmias harmful

Prelife threatening rhythm

rhythm may lead to future problems

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3
Q

Antidysrhythmics expected outcome

A

Resolve dysrhythmia

Restore:
CO
HR
BP
Cap refill
Return to normal state of being

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4
Q

Antidysrhythmics types

A

Group 1: sodium channel blockers
*1A,1B,1C

Group II: beta blockers

Group III: potassium channel blockers

Group IV: caclium chennel blockers

Unclassified group

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5
Q

Antidysrhythmics
Na channel blockers
Group 1A

A

Reduce exitability of heart

Encourage reperfusion

Delay repolarization in atria, ventricles and purkinje fibers

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6
Q

Antidysrhythmics
Na channel blcokers
1A
Med

A

Widening QRS (good but not too much)

Show that excitability is slowing down

For ventricular issue

Med: procainamide

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7
Q

Antidysrhythmics
Na channel blockers
1A
Nursing management

A

Dont utilize with existing conduction delay issue (blocks)

Dont give to myasthenia gravis pt
*(may increase muscle weakness)

Watch for toxic effects:
Widening of the QRS >25%
Abolition of the Pwave

Hold or stop administation notify provider

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8
Q

Antidysrhythmics
Na channel blockers
Group 1B

A

Decrease depolarization, automaticity, excitability

Main effect in ventricles

Tx: PVCs premature ventricular contractions

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9
Q

Antidysrhythmics
Na channel blockers
1B

A

Lidocaine

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10
Q

Antidysrhythmics
Na channel blockers
1B
Dont use with
Monitor
Stop if

A

Do not use with cardiac blocks

Check blood level for toxicity

Constant ECG monitoring for IV admin

Stop infusion if toxic signs:
Prolonged PR interval or QRS complex
Aggravation of existing dysrhythmia

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11
Q

Antidysrhythmics
Na channel blockers
Group 1C

A

Prevent supraventricular tachydyrhythmias

Med: aminodarone

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12
Q

Group II meds

A

Beta blockers

Lower HR and BP

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13
Q

Group III

A

Potassium channel blockers

Prolong the effective refractory period

Chance for heart to rest

Prevent reentry phenomenon:
***HR shoots up after getting a good rhythm

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14
Q

Group III
Potassium channel blockers meds

A

Aminodarone

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15
Q

Group IV

A

Calcium channel blockers

Vasodilation

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16
Q

Unclassified antidysrhythmic meds

A

Adenosine

3 doses
1: 6mg
2: 12mg
3: 12mg

Short half life
Gotta do adenosine then flush

If it doesnt work go to cardioversion (like a AED)

nurs 221 final (8 decks)

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