Just a thought:
If mass advertising claims to have its finger on the pulse of society, I think Digital Marketing has its finger directly on the throbbing arteries.
Now, back to non-medical references on the power of New Media.
The Pulse Of Marketing
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Never another podcast episode or article 
That’s a bloody good analogy. Pun intended.
It’s not just a finger, because that’s analog, it’s more like an electrocardiogram. Avinash would have a field day with this analogy! Digital marketing gives us more accuracy in predicting the next big media heart attack. Sorry, enough with the medical analogies, must get back to my patients..err, my clients.
You should start tweeting stuff like that on a regular basis.