Key result
Freeze-etch replicas of guinea-pig myocardial cell membranes revealed an ordered array of pits or stumps at Z levels, interpreted as T-tubule apertures and remnants, along with pinocytotic vesicles.
This study demonstrates the utility of the freeze-etch technique in visualizing the ultrastructure of guinea-pig cardiac muscle, including T-tubules and pinocytotic vesicles.
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No immediate clinical implications; leaves open extension of freeze-etch technique to human cardiac ultrastructure.
Rayns et al. (1968) studied Normal guinea-pig myocardium. Freeze-etch technique was evaluated on Surface features of striated muscle. Freeze-etch replicas of guinea-pig myocardial cell membranes revealed an ordered array of pits or stumps at Z levels, interpreted as T-tubule apertures and remnants, along with pinocytotic vesicles.
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