Adjust RHYTHM 2 so it is exactly half time (double) RHYTHM 1.
Adjust VCOs and SUB FREQs as desired, I like to keep them at root, 3rd, and 5th for this patch.
Fiddle with VCF ATTACK and VCF EG AMT until you start hearing the whooshing pulse.
OPTIONAL: Patch VCO 1 out to VCO 2 in, and VCO 2 out to VCO 1 in as indicated by the dotted patch lines. This makes the VCOs into something akin to a noise generator, dropping any musical quality and just leaving the strong, whooshing heart beat. In this mode, play the CUTOFF and VCF EG AMT to increase/decrease the effect. You can hear this in the second half of the recorded sample.