[en] The quark condsensate is obtained in terms of vacuum expectation values of gluonic gauge-invariants from the one-loop QCD effective action for chromomagnetic and self-dual constant background fields in presence of massive quarks. Heavy quark expansion results - as used in QCD sum rules - are recuperated for heavy quarks and a zero chiral limit is attained for < anti PSIPSI> unless a parity-violation condensate < Fsup(a)sub(μν)F tildesup(a)sub(μν)>=O(m) exists. (orig.)