Hello, From the history provided it appears your father has multiple conditions including diabetes, hypertension, a heart condition and kidney disease. In this setting with symptoms of chest pain and vomiting, it is important that you get your father admitted to hospital. Firstly, a myocardial infarction (heart attack) needs to be ruled out by doing an ECG along with cardiac enzymes and perhaps an echocardiography depending on your father s examination findings . There is a particular type of MI (known as inferior wall MI) that presents in this way and if untreated could be life threatening due to complications. His loss of fluids through vomiting will need to be addressed in the hospital as untreated this can lead to low blood pressure and shock. While pancreatic disease can present with chest pain and occasional vomiting, the vomiting is usually not so severe. It may also be associated with fever,headaches, nausea, weakness, infection and abdominal pain. Kidney disease presenting with chest pain and vomiting could be seen in kidney failure with an associated heart condition called uremic pericarditis but it is less likely. If a heart attack is ruled out and fluids are replaced further evaluation will can be done at the hospital.