Electrical energy stimulates a mechanical contraction of the cells of the heart, creating a mechanical squeeze used to push blood.
What is mechanical contraction?
The sliding filament model of contraction is what causes the real mechanical contraction response in heart muscle. To shorten or lengthen the muscle fiber for contraction and relaxation, myosin filaments glide along actin filaments in the sliding filament model.
Mechanical stimulation of cells is most commonly performed by pneumatic, piezoelectric, or electromagnetic stretching of deformable polydimethylsiloxane substrates or thin membranes.
Cardiac muscle fibers undergo coordinated contraction via calcium-induced calcium release conducted through the intercalated discs.
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