If you have a choice to choose between any of the two then I would recommend you to go for BSc Cardiac Pulmonary Perfusion Technology over BSc Cardiac Technology because you will learn more stuffs which will be helpful for you in your later career than that of BSc Cardiac Technology.

Although BSc Cardiac Pulmonary Perfusion Technology & BSc Cardiac Technology both the holders plays the same role in the hospital setup. But in terms of knowledge BSc Cardiac Pulmonary Perfusion Technology will impart you more information to the heart-lung system.

I hope my answer helps. All the very best for your future endeavors!