TY  - JOUR 
T1  - Valsalva maneuver procedures in the diagnosis of right-to-left shunt by contrast-enhanced transcranial doppler using agitated saline solution with blood as a contrast agent
JO  - Arquivos de Neuro-Psiquiatria
A1  - Lange, Marcos Christiano
A1  - Zétola, Viviane Flumignan
A1  - Piovesan, Elcio Juliato
A1  - Werneck, Lineu César
SN  - 0004-282X
UL  - 10.1590/S0004-282X2010000300016
VL  - 68 
Y1  - 2010
PB  - Brazil 
ER  -