Exam 4 - Dysrhythmias - Chapter 30

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What is the pathophysiology of dysrhythmias?
- abnormalities of electrical conduction
- may be harmless or life threatening
Name s/s of dysrhythmia
- abnormal rhythm on EKG
- tachycardia or bradycardia
- abnormal VS
- dizziness, fainting
- weakness
- SOB
- palpitations
- ↓exercise tolerance
what electrolytes are associated with normal electrical heart conduction?
- Na+
- Ca+
- K+
In anti-dysrhythmic drugs what does the acronym SBPC stand for?
- Sinus-rhythm (sodium-ion chan blockers) class I
- Best (Beta-adrenergic blockers) class II
- Possible (Potassium-ion chan blockers) class III
- Condition (Calcium-ion chan blockers) class IV
what is the mechanism of action of propranolol (Inderal)
- block beta receptors
- reduces automaticity
- slows conduction velocity across myocardium
what are the adverse effects of propranolol (Inderal)?
- bradycardia
- hypotension, dizziness, fainting
- bronchospasm
- hypoglycemia
- ↓ libido
what is the mechanism of action of amiodarone (Cordarone)?
- block K+ channels in myocardial cells
- lengthens refractory period
- stabilizes dysrhythmias
what is the primary use of amiodarone (Cordarone)?

serious dysrhythmias
what are the adverse effects of amiodarone (Cordarone)?
- bradycardia
- hypotension
- blurred vision
- pneumonia-like syndrome
- photosensitivity
- hepatotoxicity, thyroid dysfunction
- can create new dysrhythmia or worsen one
- can ↑ digoxin levels by 70%
what is the mechanism of action of verapamil (Calan)?
- block Ca+-ion channels
- reduces automaticity
- slows myocardial (AV) conduction velocity
what are the adverse effects of verapamil (Calan)?
- bradycardia
- hypotension
- constipation
- headache
- *well tolerated and safe for most patients
Inderal (propranolol) is what type of beta-blocker?

What type of pt should it NEVER be used on?

non-selective beta blocker (beta2 affects lungs!)

COPD patients

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cbennett

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Exam 4 - Dysrhythmias - Chapter 30

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Exam 4 - Dysrhythmias - Chapter 30

Updated

2017-04-07T02:41:09Z

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