<s>[INST] My dad had singal bypass surgery and mitral valve replacement. He had much trouble with fluid retention post surgical after coming home. Since then it has been up and down but now I notice his legs are going purple in color. They are warm to touch but we know this is abnormal. What do you suggest? [/INST] Thanks for your question on Healthcare Magic. I can understand your concern. Sometimes, heart failure is seen post surgically despite of bypass grafting and valvular repair. Fluid retention and edema feet are more suggestive of heart failure in your father's case. So better to get done fresh 2d echo report to know the heart functions. He will need diuretics, cardiac inotropic drugs and other cardiac supportive drugs together treat heart failure and edema feet. So consult his doctor and discuss all these. Hope I have solved your query. I will be happy to help you further. Wishing good health to your father. Thanks. </s>