Physiology degree

How a cardiac physiologist is supposed to make money beside than teaching ?

Working as a cardiac physiologist in a clinical setting! They are healthcare professionals who play a valuable role in cardiology. Perhaps this does not exist in the healthcare system where you live.

Yes, a medicine degree includes physiology, but only a certain amount. You can learn physiology to a far greater depth than that which is taught at medical school. My experience in the UK is that physiology in pre-clinical medicine, is generally not taught by doctors - it is taught by scientists - researchers / academics.

A cardiac physiologist is a dedicated healthcare professional within the NHS - they are heavily involved in various forms of cardiac testing such as stress tests and involved in other procedures such as PCI (busting clots during acute heart attacks!) and pacemaker fittings and imaging of coronary vessels - it's a brilliant career and definatly not one to underestimate

In the university Physiology is not taught by doctors, but by people that have a degree in medicine, even if are not working as a doctor.

Perhaps this is correct in Italy, but the UK you do not have to have a medicine degree to teach physiology. Many people who teach physiology (including teaching physiology to medical students) have a science undergraduate + postgraduate degree. In the UK you can study many different types of bioscience degree - biomedical science, biochemistry, genetics, biology, physiology, zoology, just to name a few.