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Group 3: Potassium Channel Blockers – Antiarrhythmic Drugs

by Pravin Shukle, MD
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    The lecture Group 3: Potassium Channel Blockers – Antiarrhythmic Drugs by Pravin Shukle, MD is from the course Cardiovascular Pharmacology.


    Included Quiz Questions

    1. Act on the potassium channels, which affect depolarization of the membrane.
    2. Will shorten the action potential.
    3. Will shorten the PR interval on the ECG.
    4. Will shorten the effective refractory period (ERP)
    5. Increases the ventricular response to atrial dysrhythmia and tachycardia.
    1. Amiodarone and sotalol.
    2. Amiodarone and esmolol.
    3. Esmolol and Sotalol.
    1. Blocks the slow sodium, potassium, and calcium currents, and has beta blocking ability.
    2. Blocks the slow sodium current.
    3. Blocks the slow sodium, potassium, and calcium currents.
    4. Has beta blocking ability.
    1. The crackles are due to fibrosis. Consider pulmonary fibrosis secondary from Amiodarone toxicity.
    2. The crackles are due to pulmonary oedema. Consider heart failure due to excessive beta blockade
    3. The crackles are due to blood in the lung. Consider pulmonary hemorrhage due to the dabigitran.
    4. The crackles are due to air trapping. Consider emphysema due to smoking.
    1. hepatic steatosis.
    2. corneal verticillata.
    3. microcrystalline deposits causing pulmonary fibrosis.
    4. parasthesia and tremor due to peripheral neuropathy.
    5. tremor due to thyroid dysfunction (hyperthyroidism), or alternatively hypothyroidism.

    Author of lecture Group 3: Potassium Channel Blockers – Antiarrhythmic Drugs

     Pravin Shukle, MD

    Pravin Shukle, MD


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