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.
Ejection time was measured directly from pulsed-wave Doppler of the LV outflow tract. End-diastolic volume was estimated using Simpson's single-plane method, while mass was estimated using the bullet equation detailed in Methods. ▵, mice; ○, rats; ▴, rabbits; ▵, dogs; •, humans.
