Final answer:
Beta blockers such as metoprolol and propranolol are indicated for stable wide complex tachycardias to control ventricular rate by blocking sympathetic activity, although their use must be carefully considered to prevent adverse effects.
Step-by-step explanation:
What stable wide complex tachycardias are beta blockers indicated for? Beta blockers are a class of drugs often used in the treatment of cardiovascular diseases, particularly in conditions where sympatholytic action is beneficial, such as high blood pressure, congestive heart failure, and post-myocardial infarction. These medications include metoprolol, which is selective for the beta-1 receptor, and propranolol, which is a nonselective beta blocker. In the context of stable wide complex tachycardias, beta blockers could be indicated to control ventricular rate, especially if the tachycardia is thought to be caused by enhanced sympathetic activities, like ventricular tachycardia (VT) in the absence of acute decompensation. Notably, due care must be taken, as inappropriate use of beta blockers, especially in undiagnosed arrhythmias, may lead to detrimental effects like bradycardia or heart stoppage.