positive regulation of atrial cardiac muscle cell action potential
activation of atrial cardiac muscle cell action potential
narrow
up regulation of atrial cardiac muscle cell action potential
exact
up-regulation of atrial cardiac muscle cell action potential
exact
upregulation of atrial cardiac muscle cell action potential
exact
Any process that activates or increases the frequency, rate or extent of atrial cardiac muscle cell action potential.
GO:0045760
positive regulation of action potential
is_a
GO:0098910
regulation of atrial cardiac muscle cell action potential
is_a
GO:0086014
atrial cardiac muscle cell action potential
positively_regulates