In a broad sense, physiology is the study of the chemical and physical base
s of life processes. Consequently, the evolution of our knowledge of cardio
vascular functions is closely linked to the developments in many fields of
science, including chemistry, physics, engineering, and biology. A cursory
examination reveals that different "foundation" sciences predominated in di
fferent stages of the history of cardiovascular physiology. Today, cardiova
scular physiology is poised to exploit new developments in ail areas of sci
entific inquiry. However, cardiovascular physiologists have not always embr
aced the power of the multidisciplinary approach. In this brief overview of
the history of cardiovascular physiology in the 20th century, the major fo
cus is on some of the major advances in the field and the contributions of
other disciplines to these developments. In addition, the forces that influ
enced cardiovascular science in this century and their impact on the evolut
ion of the field in the new millennium are discussed.