Heart Motu Cordis" (1628) by the English physician William Harvey. Harvey's book completely describes the systemic circulation and the mechanical force of the heart, leading to an overhaul of the Galenic doctrines. Otto Frank (1865–1944) was a German physiologist; among his many published works are detailed studies of this important heart relationship. Ernest Starling (1866–1927) was an important English physiologist who also studied the heart. Although they worked largely independently, their combined efforts and similar conclusions have been recognized in the name "Frank–Starling mechanism". Although Purkinje fibers and the bundle of His were discovered as early as the 19th century, their
I Need to Know (Tom Petty and the Heartbreakers song) Following Tom Petty's death on October 2, 2017, Local H have been playing the song in concert. I Need to Know (Tom Petty and the Heartbreakers song) "I Need to Know" is a song written by Tom Petty and recorded by American rock band Tom Petty and the Heartbreakers. It was released in 1978 as the first single from their second album "You're Gonna Get It!". It peaked at #41 on the "Billboard" Hot 100 singles chart in 1978. This song as well as "Listen to Her Heart" was already being played live in concert as early as June 14,