Thanks for writing in.
Because of your age, cardiac disease and emphasis on quality of life, I would not recommend chemo for you. However I would strongly recommend endocrine therapy with aromatase inhibitor
(anastrozole, letrozole or exemestane) for 5 years as these are the mainstay of therapy in lobular carcinoma
at your age. Herceptin may be considered but only if the cardiac ejection fraction
is fine and that too with very careful cardiac monitoring during therapy.