BP: Sympatholytics: Beta Adrenergic Blockers

Question 1

Common meds

Answer 1

• beta 1 (cardio selective): metoprolol
• beta1 and beta2 (non-selective): propranolol
• alpha and beta blockers: carvedilol

Question 2

Action

Answer 2

• Beta1 (cardioselective) and beta2 (non-selective): decrease HR, decreased myocardial contraction (decrease CO), decrease rate of AV conduction
• alpha and beta blockers: alpha adds vasodilation

Question 3

Use

Answer 3

Primary HTN, angina, HF, MI, tachydysrhythmias

Question 4

Complications

Answer 4

• Beta 1 blockade: bradycardia, decreased CO, AV block, orthostatic hypotension, rebound myocardium excitation
• beta 2 blockade: bronchoconstriction, glycogenolysis (breakdown of glycogen) is inhibited

Question 5

Nursing considerations

Answer 5

• Beta1 blockade: monitor VS, hold HR <50, use with caution for HF, monitor for signs of worsening HF, baseline ECG, myocardium becomes sensitized to catecholamines with long term use, do not stop abruptly, d/c over 1-2 weeks
• beta2: avoid in asthmatics, diabetic mellitus patients rely on the breakdown of glycogen into glucose to manage low blood sugars, monitor blood glucose levels