ARRT Patient Care Practice Exam

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Which drug is commonly used to treat dysrhythmias?

Epinephrine
Lidocaine
Nitroglycerin
Verapamil

The correct answer is: Verapamil

Verapamil is commonly used to treat dysrhythmias because it is a calcium channel blocker that specifically affects the conduction system of the heart. By blocking calcium influx, it slows down the conduction through the atrioventricular (AV) node, which can help to manage certain types of rapid heart rhythms, particularly atrial fibrillation and paroxysmal supraventricular tachycardia. Its effectiveness in reducing heart rate and stabilizing abnormal rhythms makes it a valuable medication in cardiology. The other drugs listed have different primary uses: Epinephrine is typically utilized in emergency situations, particularly for anaphylaxis or cardiac arrest due to its role in increasing heart rate and blood pressure; Lidocaine is an antiarrhythmic mainly used in emergency settings for treating ventricular arrhythmias but is not broadly utilized for general dysrhythmias; Nitroglycerin is primarily used for angina and heart failure management by dilating blood vessels to improve blood flow and reduce myocardial oxygen demand, but it does not directly treat dysrhythmias.