Answer to Question 1
Correct Answer: 3
Rationale 1: Bradyarrhythmias are common in older adults, and a heart rate of 58 is not the most significant indicator of risk of stroke.
Rationale 2: Prolongation of the PR interval is not normal but is not a precursor of stroke.
Rationale 3: Atrial fibrillation slows the movement of blood through the chambers of the heart and may result in clot formation. If a clot is ejected from the heart into the systemic circulation, a stroke may occur.
Rationale 4: Occasional PVCs are common and are not a precursor of stroke.
Global Rationale: Atrial fibrillation slows the movement of blood through the chambers of the heart and may result in clot formation. If a clot is ejected from the heart into the systemic circulation, a stroke may occur. Bradyarrhythmias are common in older adults, and a heart rate of 58 is not the most significant indicator of risk of stroke. Prolongation of the PR interval is not normal but is not a precursor of stroke. Occasional PVCs are common and are not a precursor of stroke.
Answer to Question 2
Correct Answer: 1
Rationale 1: Calcium channel blockers are class IV antiarrhythmic drugs and are administered to treat SVT.
Rationale 2: Class IC drugs are used for severe ventricular dysrhythmias.
Rationale 3: Class IB drugs are used for severe ventricular dysrhythmias.
Rationale 4: Class IA drugs are given for atrial fibrillation, premature atrial contractions, premature ventricular contractions, and tachycardia.
Global Rationale: Calcium channel blockers are class IV antiarrhythmic drugs and are administered to treat SVT. Class IC and Class IB drugs are used for severe ventricular dysrhythmias. Class IA drugs are given for atrial fibrillation, premature atrial contractions, premature ventricular contractions, and tachycardia.