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NU345.01 Pharmacology > Beta Blocker (Class II) > Flashcards

Beta Blocker (Class II) Flashcards

1
Q

What is the action of beta blockers?

A

blocks beta receptors found in the heart (and lungs)

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2
Q

Briefly describe the difference between selective and non-selective beta blockers.

A

selective = heart only
non-selective = heart & lungs

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3
Q

What is the location of the beta1 receptor?

A

heart

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4
Q

What is the location of the beta2 receptor?

A

lungs

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5
Q

What is the trick for remembering B1 vs B2 locations?

A

B1, one heart
B2, two lungs!

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6
Q

What is the intended action of beta blockers?

A

to slow conduction in the AV node

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7
Q

What is the intended effect of beta blockers?

A

To reduce contraction speed of the heart and to reduce its oxygen demand

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8
Q

What are the uses for beta blockers?

A

Primarily hypertension, tachycardic dysrhythmias
Also: heart failure, post-MI

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9
Q

Identify contraindications for beta blockers.

A

Asthma, COPD, DM, bradycardia, dysrhythmias

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10
Q

Identify adverse effects of beta blockers.

A

“The B’s!”
Bradycardia, low BP,
Breathing problems (non-selective)
Bad for worsening heart failure
Blood sugar masking (counteracts symptoms of low glucose)
Blahs (fatigue, sexual disfunction)

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11
Q

Identify precautions for beta blockers.

A

bronchoconstriction
* monitor asthma patients on non-selective beta blockers
caution w/ diabetes
* blocks release of insulin, can cause hyperglycemia
* masks tachycardia, shaking of hypoglycemia

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12
Q

Identify drug interactions with beta blockers.

A

other medications that slow heart rate (such as calcium channel blockers)

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13
Q

Name the exemplar beta blockers.

A

Metoprolol, Propanolol

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14
Q

Identify exemplar selective beta blocker.

A

metoprolol

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15
Q

Identify exemplar non-selective beta blocker.

A

propranolol

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16
Q

Where does metoprolol act in the body?

A

Selective - B1 - one heart

17
Q

Where does propranolol act in the body?

A

Non-selective - B2 - two lungs and heart

18
Q

Which exemplar beta blocker is precautioned with asthma?

A

non-selective propranolol acts in the heart AND lungs

19
Q

What should be assessed with beta blockers?

A

obtain baseline EKG, monitor apical pulse 1 full minute

20
Q

When should scheduled beta blockers be held?

A

when HR < 60 bpm (alert provider)

21
Q

Identify teaching points for beta blockers.

A
  • Report signs of CHF (weigh gain, SOB, edema)
  • Slow position changes to prevent orthostasis
  • Monitor glucose, strict diabetic regimen (no skipping meals, meds)
22
Q

Describe requirements when discontinuing beta blockers.

A

Beta blockers must not be stopped abruptly, must step down slowly.

NU345.01 Pharmacology (11 decks)

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