15 days before my father underwent angioplasty and got placed one stent in his artery. From last 7-8 days he has been very weak and lost his appetite. He also had fever at irregular interval ranging 100-101° F. We gave him paracetamol and azithral. Now from last 1.5 days he doesn't have fever but still have very weakness and his mouth become very dry with white coloured tongue,discomfort in swallowing, some obstruction in throat with little cough. Because of his weakness I couldn't take him to the cardiologist who had operated him. Is this common problems after angioplasty, is this matter of worry ? Please advise what should I do?