Key result
Decreased transient outward potassium current (Ito) density in aging or failing myocardium prolongs the action potential and alters Ca2+ homeostasis, potentially increasing the risk of arrhythmias.
This review highlights how modulation of the transient outward potassium current (Ito) indirectly regulates excitation-contraction coupling and Ca2+ homeostasis in the heart, particularly in disease states like heart failure.
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May increase arrhythmia risk in aging or HF; leaves open whether Ito modulation improves outcomes.
Rosana A. Bassani (2006) conducted a review in Cardiomyopathy and heart failure. Transient outward potassium current (Ito) was evaluated. Decreased transient outward potassium current (Ito) density in aging or failing myocardium prolongs the action potential and alters Ca2+ homeostasis, potentially increasing the risk of arrhythmias.
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