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.
Changes from baseline for the different sequences for (a) cardiac output, (b) stroke volume, (c) mean arterial pressure, and (d) heart rate. The bar indicates the point where we have done our analyses, which represent the last 30 s of interventions.
