J. Kluger et al., USEFULNESS OF INTRAVENOUS METOPROLOL TO PREVENT SYNCOPE INDUCED BY HEAD-UP TILL, The American journal of cardiology, 82(6), 1998, pp. 820
Intravenous metoprolol was found to be significantly more effective th
an placebo in preventing head-up tilttable induced neurally mediated s
yncope. The reproducibility of acute tilt-table testing is only 63% an
d suggests caution in the interpretation of acute drug testing during
tilt-table studies.