High blood pressure often does not present immediate warning signs, with many people perceiving it merely as a number on a screen. However, if left untreated, it can silently place continuous strain on the heart and blood vessels, significantly increasing the risk of long-term and severe cardiovascular complications.
In Malaysia, nearly one in three adults is affected by hypertension, yet many remain unaware of their condition. Often referred to as a “silent killer,” high blood pressure may begin with vague or unnoticed symptoms, while internal damage gradually develops over time. In conjunction with World Hypertension Day, Consultant Cardiologist and Electrophysiologist at Sunway Medical Centre, Sunway City (SMC), Dr Gary Lee Chin Keong, highlights the importance of understanding blood pressure, recognising its risks, and knowing key health indicators to protect heart health.
The heart and blood vessels function as a continuous circulation system, with the heart acting as a pump and the vessels serving as a network of pathways. When blood pressure remains consistently high, the heart is forced to work harder to circulate blood throughout the body. According to Dr Gary, the heart initially adapts by becoming thicker and stronger, but this adaptation is not beneficial in the long term. Over time, the constant strain causes the heart muscle to stiffen, reducing its ability to fill and pump blood efficiently.
One of the earliest manifestations of this process is left ventricular hypertrophy (LVH), a thickening of the heart’s main pumping chamber. As the muscle wall becomes thicker, the chamber has less capacity to fill with blood and may also receive less oxygen. Eventually, the heart becomes stiffer, less flexible, and more susceptible to failure. LVH is particularly concerning because it often develops without noticeable symptoms and is typically only detected through diagnostic tests such as an echocardiogram, which reveals structural changes in the heart.
Many individuals with hypertension remain unaware of underlying heart damage because they feel well even as internal changes occur. Symptoms such as chest pain, shortness of breath, palpitations, dizziness, or fainting are often mistaken for stress, fatigue, or digestive issues. By the time these symptoms become more apparent, the condition may already have progressed significantly. This underscores the importance of regular health screening, even in the absence of symptoms, as prolonged high blood pressure increases the risk of heart failure, stroke, heart attack, kidney disease, and abnormal heart rhythms.
Dr Gary also highlights the connection between hypertension and atrial fibrillation, an irregular heart rhythm that can disrupt normal blood flow and increase the risk of blood clot formation, potentially leading to stroke. He explains that hypertension does not only affect the heart, but also has wider implications on the brain, kidneys, and blood vessels throughout the body. Stroke remains one of the leading causes of death in Malaysia, making early detection and prevention even more critical.
He further notes a growing concern among younger Malaysians, with increasing cases of hypertension and heart disease being diagnosed in individuals in their 20s and 30s. Previously considered a condition affecting older adults, hypertension is now increasingly linked to modern lifestyle factors such as long working hours, chronic stress, insufficient sleep, physical inactivity, smoking, high salt intake, and frequent consumption of processed foods. Obesity and diabetes further elevate the risk, creating what Dr Gary describes as a dangerous cluster of cardiovascular risk factors. As a result, complications are now appearing at younger ages and persisting for longer durations.
The good news, however, is that early detection can significantly improve outcomes. Dr Gary encourages individuals to begin monitoring their health numbers from their 20s, including blood pressure, cholesterol levels, blood sugar, and body weight. Depending on individual risk factors, further assessments such as ECG, echocardiography, stress tests, or CT cardiac scans may be recommended. When hypertension is detected early and managed appropriately, progression of heart changes can be slowed and, in some cases, partially reversed.
Management typically involves a combination of medication, lifestyle modifications such as dietary changes, regular exercise, weight control, smoking cessation, stress management, and consistent follow-up care. Dr Gary also stresses that patients should not discontinue medication without consulting their doctor.
He concludes with a simple but important reminder: knowing your health numbers is key to protecting your heart. Early detection and timely action remain the most effective ways to reduce the risks associated with high blood pressure and safeguard long-term cardiovascular health.
