Do not give a β-blocker to a patient with sinus tachycardia: The patient usually has a tachycardia for a reason (low stroke volume/cardiac output, fever, etc). A β-blocker is a very effective method of “knocking off” a septic, hypovolemic patient with a severe tachycardia.
Valsalva Maneuver Sinus Tachycardia Hypertensive Emergency High Peep Hypoglycemic Drug
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