High Blood Pressure in Malaysia: Causes, Symptoms & Treatment

Malaysia's National Health and Morbidity Survey paints a sobering picture: approximately 30% of Malaysian adults — roughly 6.4 million people — have hypertension. What makes this even more alarming is that about 50% of them are unaware of their diagnosis. They feel perfectly well while their arteries, heart, kidneys, and brain are slowly being damaged. Hypertension is defined as persistently elevated blood pressure at or above 140/90 mmHg on multiple readings. The top number (systolic) reflects the pressure when your heart contracts; the bottom number (diastolic) reflects pressure when the heart relaxes. Blood pressure classification: - Normal: below 120/80 mmHg - Elevated: 120 to 129 systolic with below 80 diastolic - Stage 1 Hypertension: 130 to 139 over 80 to 89 mmHg - Stage 2 Hypertension: 140/90 mmHg or higher - Hypertensive Crisis: above 180/120 mmHg, requiring immediate medical attention Hypertension accelerates damage to blood vessel walls throughout the body. The consequences accumulate silently: the heart enlarges working against elevated pressure, arteries stiffen, the kidneys lose filtering ability, and the brain becomes vulnerable to stroke. By the time symptoms appear — headache, vision changes, or chest pain — significant damage may already have occurred. Regular blood pressure checks are therefore the most important single preventive measure you can take.

A single elevated reading does not confirm hypertension. Blood pressure is variable — it rises with physical activity, stress, caffeine, and even the anxiety of being in a clinic (called white coat hypertension). Accurate diagnosis requires: 1. Multiple readings on multiple occasions: at least 2 to 3 elevated readings on 2 or more separate visits, taken after 5 minutes of quiet rest. 2. Correct measurement technique: sit quietly for 5 minutes; arm at heart level; avoid coffee and exercise for 30 minutes prior. Both arms should be measured on the first visit. 3. Home blood pressure monitoring: recording twice-daily readings over 1 to 2 weeks provides reliable data. Target for home monitoring is below 135/85 mmHg. 4. Ambulatory monitoring (ABPM): wearing a blood pressure monitor for 24 hours eliminates white coat hypertension and reveals nocturnal patterns. Once hypertension is confirmed, investigations are done to assess organ damage and identify secondary causes. These include ECG, renal function, urine protein, fasting glucose, lipid profile, and thyroid function. Secondary hypertension caused by a treatable underlying disease accounts for about 5% of cases.

When lifestyle changes are insufficient, or for Stage 2 hypertension, medication is essential. Malaysian guidelines recommend the following drug classes as first-line: ACE Inhibitors such as Perindopril and Enalapril: reduce blood pressure by relaxing blood vessels. Particularly beneficial for patients with diabetes or kidney disease. Side effect: persistent dry cough in 10 to 20% of patients, more common in Asian populations. Angiotensin Receptor Blockers (ARBs) such as Losartan, Telmisartan, and Valsartan: similar mechanism to ACE inhibitors but without the cough. Often preferred in Asian patients. Calcium Channel Blockers such as Amlodipine and Nifedipine: relax the walls of blood vessels. Well-tolerated. Common side effect: ankle swelling. Thiazide Diuretics such as Hydrochlorothiazide and Indapamide: remove excess fluid and salt through the kidneys. Often combined with other agents. Beta-Blockers such as Atenolol, Bisoprolol, and Carvedilol: reduce heart rate and output. Particularly useful in patients with heart failure or after heart attack. Many patients require two or more medications to achieve target blood pressure. This is normal and not a sign of treatment failure. Long-term monitoring at Klinik Muhibbah includes blood pressure at every visit, renal profile annually, ECG annually, HbA1c and lipid profile annually, and regular medication reviews. Never stop hypertension medication without consulting your doctor — blood pressure can rebound dangerously.