Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
TRS-BRS, BRS determined by TRS during resting conditions; TRS-Phe, TRS-Nitro, BRS determined by TRS during application of phenylephrine (Phe) or nitroprusside (Nitro); Oxford-Phe, Oxford-Nitro, BRS determined by the modified Oxford maneuver using phenylephrine (Phe) or nitroprusside (Nitro).
