Assertion: heart's blood | /r/AtLocation | the heart
Facets:
value: at the beginning of a contraction
type: TEMPORAL
Source sentences:
text: In other words, while the Frank-Starling mechanism (a unique property of the heart that results in a stronger heartbeat when more blood is present in the heart at the beginning of a contraction) is utilized in older persons during exercise, its effectiveness is reduced because the LV of an older person does not empty to the extent to which it does in younger individual.