Hypertension – high blood pressure – is one of the key ingredients in the recipe for cardiovascular disease (CVD). Since April 2009 all patients diagnosed with hypertension should have a cardiovascular risk assessment carried out in order to meet the requirements of the Quality and Outcomes Framework (QOF). This reflects the importance of hypertension as a risk factor for CVD. In this article, we will review the correct method for measuring blood pressure and the key guidelines setting out how and when a diagnosis of hypertension should be made.