A heart transplant can drastically improve the person's quality of life and life expectancy. However, waiting lists are long and there is a scarcity of donor organs, which is why they must be judiciously used, to provide maximum benefit. A person is a good candidate for heart transplant if he/she has end-stage and is not responding or benefiting from conventional therapy. Most people who have to consider this option are concerned about heart transplant life expectancy and success rate. Read on.