what is the role of calcium in cardiac muscle contraction
The role of calcium entry in cardiac excitation-contraction coupling was subsequently explained by the finding that calcium release from the cardiac SR, unlike that of skeletal muscle, depends on a small calcium influx across the plasma membrane in a process called âcalcium-triggered calcium releaseâ. 36 Calcium release from the cardiac SR, which causes localized âcalcium sparksâ that can be visualized when cells are injected with calcium-sensitive dyes, 37 38 is a critical ...