Click image to view full screen

In the left ventricle, identify the thin strands which resemble the chordae tendineae. These strands, however, do not attach to the cusps of the mitral valve; they contain Purkinje fibers and are called false chordae tendineae. They are components of the conduction system of the heart.

Links and References:
Grant's: 1.65
Netter: 209
Rohen/Yokochi: 238, 243