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.
Efficacy of β-AR blockade protocol demonstrated in 3 subjects by lack of heart rate (A) or systolic (B) or diastolic (C) blood pressure response to β-AR stimulation with isoproterenol. Data are expressed as change from level at rest following isoproterenol infusion or propranolol followed by isoproterenol (Prop + Iso).
