MSN: 7 serious heart diseases high blood pressure can cause - and why you should never ignore them 7 serious heart diseases high blood pressure can cause - and why you should never ignore them USA TODAY: Tests show a new cause of high blood pressure and how to treat it Tests show a new cause of high blood pressure and how to treat it High blood pressure, or hypertension, is a leading cause of cardiovascular diseases across the world. It develops gradually and often without noticeable symptoms, silently damaging blood vessels and ...