At Last I have been able to experiment with my  terasic Deo_Nano Development Board .

It uses a Altera Cyclone IV, EP4CE22F17C6N, FPGA chip.

My example above connects the Deo to the Olimex EKG/EMG Shield to measure my Heart activity using the Onboard ADC chip and Displayed on the on board LED array.

The Olimex is a 3 probe system essential for the correct measurment of heart activity using this configuration :-

Einthoven's triangle is an imaginary formation of three limb leads in a triangle used in EKG, formed by the two shoulders and the pubis. The shape forms an inverted equilateral triangle with the heart at the center that produces zero potential when the voltages are summed.

The probes can be arranged to measure the electrical activity of any muscle depending on the placement.