Hi, my father has been diagnosed with lung cancer a month ago. Most of the doctors believe it's in its 4th stage. And the only treatment is by doing Chemotherapy. But as long as my dad has a heart disease, and his heart doesn't function properly,his doctor believes chemotherapy is going to be risky! Is this true? I want to ask you if we can start the chemotherapy in case of having a heart disease, and also i need to know whether we can start the process with lower doses of Chemotherapy. Cause it's already in its 4th stage and there's no need to hurry? Please help me out!