Any process that activates or increases the frequency, rate or extent of high voltage-gated calcium channel activity.
Synonyms:
exact_synonym:
activation of high voltage-dependent calcium channel activity; positive regulation of high voltage-dependent calcium channel activity; up-regulation of high voltage gated calcium channel activity; up-regulation of high voltage-dependent calcium channel activity; upregulation of high voltage-dependent calcium channel activity; upregulation of high voltage-gated calcium channel activity
narrow_synonym:
activation of high voltage-gated calcium channel activity