Cardiologist warns 'never ignore' three subtle symptoms of 'silent heart killer'While most people won't notice symptoms of the 'silent killer' until it is too late, there are still some signs to watch out forView 3 Images The cardiologist listed the 'subtle' signs that should never be overlooked (Image: Getty)A cardiologist has issued a warning over a 'silent killer' health condition that should never be ignored, especially if you do experience three 'subtle' symptoms. High blood pressure is still the main reason for heart-related deaths in England. ‌High blood pressure, officially called hypertension, is often referred to as a 'silent killer' since it typically doesn't show any symptoms. Magnesium, for example, due to modern farming methods, processing, and all those things, probably also has an impact on blood pressure. View 3 Images Regularly monitoring your blood pressure is vitalDr Gupta also strongly criticises treating high blood pressure with pills alone without addressing root causes, calling it a "disservice to patients".