Occasionally I get very sudden attacks of very high blood pressure and rapid heart beat. It only occurs late at night (10:00 - 2:00) and does not seem to be related to anxiety, stress or activity as I am awake and, so far have been watching TV and relaxing each time it has happened.
High blood pressure and rapid heart rate can be due to stress, lifestyle or being hypertensive. If it is specific at night can be due to stress and lack of sleep. At your stage beta blockers like metoprolol can be the best choice to control the heart rate and blood pressure. Kindly check your pressure with your treating doctor to start on medications. All the best.