The client asks the nurse how most medications for dysrhythmias work. What is the best response by the nurse?
1. "Blocking potassium, sodium, or calcium ion channels is the primary way to prevent or terminate dysrhythmias."
2. "Most medications for dysrhythmias shorten the refractory period."
3. "These medications will lower your blood pressure, which will change the rhythm of your heart."
4. "The mechanism of these drugs is unknown."
1
Rationale 1: Blocking potassium, sodium, or calcium ion channels is the primary pharmacologic strategy used to prevent or terminate dysrhythmias.
Rationale 2: Some drugs for dysrhythmias will increase the refractory period.
Rationale 3:Many of antidysrhythmic medications block sodium, potassium,and calcium ion channelsthat will also affect the blood pressure.
Rationale 4:The main way they work is to block potassium, sodium, or calcium ion channels.
Global Rationale: Most antidysrhythmic drugs act by interfering with the cardiac action potential of the potassium, sodium, or calcium ion channels to prevent or terminate dysrhythmias.
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