未登录Product of Heart Rate and First Heart Sound Amplitude as an Index of Myocardial Metabolic Stress During Graded Exercise
Tanaka, Hiroaki; Matsuda, Takuro; Tobina, Takuro; Yamada, Yousuke; Yamagishi, Tamiharu; Sakai, Hideaki; Obara, Shigeru; Higaki, Yasuki; Kiyonaga, Akira; Brubaker, Peter H.
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