This stimulation is similar to the way the nervous system normally increases heart function when triggered by emotional or exercise stress, or in diseases such as heart failure,

Unlike what was previously thought, drugs like Viagra can in fact alter heart function, ... It alters it particularly when the heart is stimulated by hormones.

My chest bumps like a dryer with shoes in it.

Pressure is calming to the nervous system.

Our latest research provides firm evidence this drug does indeed have an important impact on the heart

[Viagra] got started as a heart drug in the early 1990s and the erectile dysfunction [treatment] was a side effect, ... It got sidetracked for a completely different implication.