The levels of plasma endothelin (ET) and atrial natriuretic peptide (ANP) in young people in Bruce exercise test were determined with radioimmunoassay to study the physical mechanism of cardiovascular response during the test.

• 以放射免疫学方法检测了28名青年在Bruce运动试验中血浆ET及ANP的变化，以了解试验中心血管反应的生理机制。