question: Is Calcium/Calmodulin dependent protein kinase II (CaMKII) involved in cardiac arrhythmias and heart failure?
answer: Calcium/calmodulin-dependent kinase II (CaMKII) is a multifunctional serine/threonine kinase expressed abundantly in the heart. CaMKII targets numerous proteins involved in excitation-contraction coupling and excitability, and its activation may simultaneously contribute to heart failure and cardiac arrhythmias.  