<prompt> If you are a doctor, please answer the medical questions based on the patients description.I am 68 years old retired person and had by-pass heart surgery two years back. I am on dose of daily pills after my surgery and had been advised to minimize the water intake by 1.5 litres a day and drink only when thirsty. Since last 2 weeks I have following problems: 1 My mouth is getting dry. It is summer here so I am drinking small sips of water to quench my thirst but felling dry mouth very often. It leads me to drink more water and urinate without any relief from dry mouth. 2 I am feeling tired most of the time mostly after using stairs or short walk unlike earlier, so lie on bed to rest most part of the day. 3 Due to tiredness or I am sure the reason but I am feeling sleepy most of the time when lie on bed. 4 I am also feeling weakness now a days for no specific reason. Please note, I do not have problem of blood pressure and it is normal. I do not have diabetes with normal diet. Please advise if you diagnose anything unusual. I am remote part of small city and may need to travel distant place to see specialist in this summer, so your assistance would be very helpful for me. Y.P. Singh  <response>: Hi welcome to Chat Doctor, I understand your query and concern. Your symptoms are suggestive of heart failure secondary to ischemic changes in the heart leading to heart failure. I advise you to get an ECG,2 D Echo, lipid profile, hsCRP immediately to confirm the diagnosis. Chat Doctor. Coronary angiogram with or without stenting will be the procedure of choice. Consult your cardiologist for expert management. Hope I have answered your query at the moment, Post your further queries if any, Thank you. 