Open access echocardiography. Single assessment may be dangerous.
MacFadyen
R J
RJ
MacDonald
T M
TM
Clarkson
P
P
Wheeldon
N M
NM
D002303:Cardiac Output, Low / Q000000981:diagnostic imaging / Q000188:drug therapy; D004452:Echocardiography / Q000706:statistics & numerical data*; D005194:Family Practice; D006297:Health Services Accessibility; D006801:Humans