The WHD was first inaugurated in May 2005 and has become an annual event ever since. The purpose of the WHD is to promote public awareness of hypertension and to encourage citizens of all countries to prevent and control this silent killer, the modern epidemic. The theme for World Hypertension Day is Know Your Numbers with a goal of increasing high blood pressure (BP) awareness in all populations around the world.

Hypertension is very common indeed and hence a major public health issue. The prevalence is expected to increase considerably in the coming years. In 2000, the estimated number of adults living with high blood pressure globally was 972 million. This is expected to increase to 1.56 billion by 2025! Lifestyle factors, such as physical inactivity, a salt-rich diet with high processed and fatty foods, and alcohol and tobacco use, are reasons for this increased disease burden, which is spreading at an alarming rate from developed countries to emerging economies, such as India, China and African countries.

Adequate treatment of high blood pressure lowers this cardiovascular risk towards normal levels. However, the biggest problem for controlling hypertension is compliance with treatment. Despite very effective and cost-effective treatments, target blood pressure levels are very rarely reached, even in countries where cost of medication is not an issue. Sadly, many patients still believe that hypertension is a disease that can be ‘cured’, and they stop or reduce medication when their blood pressure levels fall to normal levels. Despite the availability of effective and safe antihypertensive drugs, hypertension and its related risk factors (obesity, high blood lipids, and diabetes mellitus) remain uncontrolled in many patients. One often talks about ‘the rule of the halves’: Only one half of the patients with high blood pressure in a population have been diagnosed, only half of those detected have been treated, and only half of those treated have been adequately treated to a normal blood pressure.

Source: Text & image: International Society of Hypertension