Cardiac drugs can only be prescribed by medical practitioners. In principle, if you are prescribed them, take them. They may have many side effects and may be unnecessary, but most often they are life-saving. Further discussion on the use of cardiac drugs should be undertaken with a medically qualified practitioner of complementary medicine or a complementary practitioner in conjunction with the medical doctor who prescribed them.
There are many naturopathic and holistic medicines and treatments that can be used for most heart conditions so one may not need to stay on the drugs once a safe and comprehensive holistic view has been taken.