This is what it sounds like but I am not sure given little of context.

Example

Objectives

This study sought to investigate the efficacy and tolerability of candesartan, according to baseline blood pressure (BP), in the 4,576 patients with a low ejection fraction (EF) (≤0.40) in the CHARM (Candesartan in Heart failure: Assessment of Reduction in Mortality and morbidity) program.

http://www.sciencedirect.com/science/article/pii/S0735109708...

There is no single test for preeclampsia, but there are several key signs that clinicians look for. If you have the disorder, the first clue that there's something wrong will probably come during your regular checkup. Every prenatal exam includes a check of your blood pressure and urine. A subtle change in blood pressure -- even as low as 10 to 20 points over your baseline measurements -- is often the first sign of preeclampsia

http://consumer.healthday.com/encyclopedia/high-blood-pressu...