Hypertension, or high blood pressure, is one of the most common yet most dangerous health conditions worldwide. According to the International Society of Hypertension and the European Society of Cardiology, it is defined as a systolic blood pressure of 140 mmHg or greater and a diastolic blood pressure of 90 mmHg or above. Around 90 to 95% of adult cases are primary or essential hypertension, while 2 to 10% are secondary hypertension linked to renal, vascular or endocrine causes.
As Dr Curimbacus, Neurologist, explains, hypertension is often referred to as the “silent killer” because most patients experience no symptoms, yet the condition quietly damages blood vessels and vital organs over time. The heart, kidneys, eyes and brain can all be affected, sometimes without detection until serious complications arise.
Hypertension develops through a combination of non modifiable genetic risk and modifiable lifestyle factors. High sodium intake, obesity, sedentary behaviour, excessive alcohol consumption and smoking are all significant contributors. Poor dietary quality, particularly diets high in sodium and low in potassium, also plays a role. This interplay between genetics and lifestyle explains why hypertension is so widespread and why prevention and management require both medical and behavioural strategies.
Hypertension is a multisystem disease, affecting several organs simultaneously. The heart and lungs may suffer from heart failure, pulmonary oedema and coronary artery disease. The kidneys are at risk of chronic kidney disease, which can progress to end stage renal disease. The eyes may develop hypertensive retinopathy, leading to vision loss. Most importantly, the brain is highly vulnerable, with consequences such as stroke, cerebral oedema and vascular dementia.
The brain is particularly vulnerable to the effects of high blood pressure.
Protecting the brain and reducing neurological risks requires achieving and maintaining target blood pressure of 120/80 mmHg or below. Lifestyle modifications such as the DASH diet (Dietary Approaches to Stop Hypertension), regular physical activity, reduced salt intake and balanced nutrition are essential. Avoiding smoking and excessive alcohol consumption is equally important. Routine blood pressure monitoring remains one of the most effective preventive measures, captured in the global call to action: #CheckYourBloodPressure.
Hypertension is a global health challenge and a true silent killer. While it affects multiple organs, the brain is especially at risk, with consequences ranging from stroke to dementia. Insights from Dr Curimbacus, Neurologist, highlight the importance of prevention, early detection and adherence to treatment.
On World Hypertension Day, let us raise awareness of this silent threat. By checking our blood pressure regularly and adopting healthier lifestyles, we can protect not only our heart and kidneys, but also our brain and cognitive health.
