Peak picking noisy data Excel 2008 mac

in reference to this thread. I should've started my own thread.

"I noticed Shg asked how noisy the data was: So, are there any excel tools that could facilitate peak picking in far noisier data? (Excel 2008 - OS X: Snow Leopard)
I ran an experiment to collect the oscilloscope data of a heart contracting as it was retrieved by an isotonic transducer. A baseline run of the data is attached. You'll see that It has peaks and troughs like any other wave, but since it's physiological data, it's not very clean.
There's also peaks roughly halfway between the larger peaks which correspond to the atrial systole (the highest peaks are the ventricle systole). In other words, there are peaks for both the Lub and the Dub in the Lub-Dub of the heartbeat (fyi, this is Rana catesbeiana ~ animal physiology lab). I need to locate both.
Cheers

edit: the two red highlighted rows represent an atrial peak and a ventricle peak, demonstrating just how undistinguished the atrial peak indeed is."