My father is 68 and a month back he had 30 days of fasting for Ramadan and after 30 days suddenly he got weakened and got admitted for 3 days and came back normal but within 10 days of his return on 12th April night sudden severe sweat and unable to breath was admitted to ICU.it was told as pulmonary flash edema and heart failure .what can it be and what should be done next as still there is swelling of legs .in insulin and dytor 5mg and some medicines .we are unable to understand the rootcause of the problem .