Trying to find a late 60's B movie in a genre similar to Danger Diabolik

Hi -I’m looking for a movie I saw at a drive-in in the late 60’s. It was a B movie, sort of in the same genre as Danger Diabolik. In fact, I may have seen them together as a double feature. I remember a female protagonist who seduces a wealthy man. He shows her how physically fit he is by performing on gymnastic still rings as a sort of foreplay. However, she knows he has a heart condition and he dies when they are about to have sex.

Fantomas (1964)?