Does every species get around 1 billion heartbeats per lifetime?

Universal scaling has always fascinated me:

Mice and Elephants: A Matter of Scale:

Mice and Elephants: A Matter of Scale

Heart rate and life expectancy in mammals and humans

Life expectancy and total heart beats per lifetime in mammals and humans

[Source]

More:

Biophysics - New Clues to Why Size Equals Destiny
Life's Universal Scaling Laws [PDF ]
Phylogeny and metabolic scaling in mammals [PDF ]
Rest heart rate and life expectancy [Abstract ]
Similarity in the number of lifespan heartbeats among non-hibernating homeothermic animals[Abstract ]
Animal Life Spans

Discussion here, via It's OK To Be Smart.