question: My mother has lung cancer.  She has it nearly 1 year. They only gave her 6 to 9 months, but she is still with us, thank god, but she is having heart palpitations, not when shes stressed, at night when she goes to bed, is usually when her heart races, she says its all over the place, and feels like its coming out of her chest, which then does make her stressed. I want to know if this is part of her condition with the lung cancer, does it happen with alot of lung cancer sufferers??