Alien Heartbeat, Machine, Alien Heartbeat, Pulsing, Repeating Beat

Heart Beat, Fast; 106 Beats Per Minute.

Heart Beat, Fluctuating.

Heart Beat, Medium; 80 Beats Per Minute.

Heart Beat, Slow; 63 Beats Per Minute.

Heart Beat, Very Fast; 158 Beats Per Minute.

Heart Pump, Machine, Heart Beat, Low Pulse, Electric Motor

Heartbeat, Speeds Up

Heartbeat; Steady, With Eerie Air Suction And Reverb.

Heartbeat; Very Low Eerie Sub Frequency, Speeding Up.

Sub Woofer; Single Dark Heartbeat, With Reverb.

Sub Woofer; Multiple Dark Heartbeats, With Reverb.