Folllowing a routine blood test yesterday, my GP rang me at 9pm last night and told me that they have found that I have too much potassium in my system which can affect my heart rhythm. So he booked me in this morning for a heart check followed almost immediately with a consultation with him, and a strong possibility of being admitted to hospital today. Didn't sleep much. Scary or what! Also told me to discontinue taking Ramipril.