Heart Health Screening: Who Needs It and When

Cardiovascular disease is the leading cause of death in India. It is well known that heart disease occurs in our people at least 10 – 15 years earlier than in the Western population. While heart attacks are sudden events, the disease that leads to them would have been present for several years or decades without detection. It follows, therefore, that detecting disease at an early stage would help in preventing heart attacks and other heart problems.

Heart disease is caused by risk factors, either single one or in combination. By and large, the risk factors for heart disease are silent and do not cause symptoms. The development of heart disease does not announce itself with early warning signs in most people. 

Plaque builds up in the arteries quietly over the years, blood pressure climbs without producing symptoms, and cholesterol levels rise without any outward indication that something is wrong. By the time the disease becomes obvious, there is often already significant damage, and one has already missed the opportunity to prevent it. This is exactly why heart health screening matters as much as it does. It is the only reliable way to find problems before they become emergencies.

Understanding which cardiac screening tests are needed, and at what age, is something every adult should be aware of, regardless of whether they consider themselves at risk.

Why Screening Matters More Than Symptoms

An important aspect of reducing the risk of cardiovascular disease is managing health behaviours and risk factors, including diet quality, physical activity, smoking, body mass index, blood pressure, total cholesterol, blood glucose, and sleep quality. But knowing which risk factors are present requires actual measurement through screening tests.

Cardiovascular risk assessment through regular screening gives both the patient and the treating doctor a clear picture of where things stand, and more importantly, the opportunity to intervene before the risk becomes a reality.

Blood Pressure: The Starting Point For Everyone

Blood pressure (BP) measurement is perhaps the most fundamental heart health screening, as high blood pressure is a major risk factor for heart disease, stroke, and other cardiovascular complications.

Blood pressure measurement should start in early adulthood. For those whose readings are below 120 / 80 mm Hg, BP should be rechecked at least once every two years. Anyone with readings above this threshold, or with additional risk factors such as diabetes, obesity, or a family history of cardiac disease, should have it checked more frequently. High blood pressure causes no symptoms in most people and is rightly called “The Silent Killer”. This is precisely what makes it so dangerous and why screening is the only way to detect it before it causes significant, irreversible damage.

Cholesterol: Start Earlier Than Most People Think

In adults aged 20 or older who are not on lipid-lowering therapy, measuring a lipid profile is an important part of health screening.

The Lipid Association of India recommends lipid screening for all adults aged 20 and higher. For people at low risk, the tests should be repeated every 3 to 5 years, with more frequent testing for those at increased risk of heart disease or stroke. The new guideline also recommends a one-time screening for lipoprotein(a), or Lp(a), which is often genetically determined and can increase a person's risk of heart disease by approximately 40% at elevated levels. 

The current recommendations also advocate treating patients much earlier, before the risks of a heart attack and stroke are higher. Updated guidance recommends using a newer risk calculator, PREVENT, to estimate the risk of developing atherosclerotic cardiovascular disease in people aged 30 to 79.

Blood Sugar: Diabetes and Cardiac Risk are Closely Linked

Diabetes accelerates the development of cardiovascular disease, so screening for blood glucose levels is essential for preventing heart disease. ICMR recommends screening for diabetes from the age of 25 years and a retest every three years. Earlier screening may be necessary for those who are overweight or have a family history of diabetes.

Identifying pre - diabetes allows for intervention before the progression of damage to blood vessels and the heart.

Who Needs Earlier or More Frequent Screening

Certain groups carry a higher baseline cardiovascular risk and require more proactive cardiac screening:

• People with a family history of early heart disease, particularly in a first-degree relative before the age of 55 in men or 65 in women
• Those with existing conditions such as diabetes, hypertension, chronic kidney disease, or obesity
• Current or long-term smokers
• People with a previous history of cardiovascular events, including heart attack or stroke
• Those with a personal or family history of familial hypercholesterolemia are now advised to be screened earlier in life, starting in childhood at around age 2 or earlier.

Risk factors such as high blood pressure, diabetes, and a family history of heart disease are reasons to have cardiac screening earlier than the standard recommended ages.

Advanced Cardiac Screening Tests

A cardiologist may recommend additional cardiac screening tests based on individual risk, as mentioned below:

• Electrocardiogram (ECG): Assesses the heart's electrical activity and can detect arrhythmias, previous heart attacks, and structural changes
• Echocardiogram: An ultrasound-based imaging test that evaluates heart structure and function
• Treadmill stress test: Identifies ischemia by monitoring heart rate, rhythm, and blood flow under physical stress
• Coronary artery calcium scan: Detects the presence and severity of calcium deposits in the coronary arteries. Coronary artery calcium is a surrogate marker for the presence of coronary plaque and necessitates intensification of risk factor modification. The absence of coronary artery calcium, however, is not to be taken as the absence of disease. 
• Coronary CT angiogram: Provides detailed imaging of the coronary arteries that can help identify blockages. 

Takeaways

Preventing heart disease is possible through heart health screening. Age 20 is good for most adults to begin taking blood pressure measurement and cholesterol screening, while blood glucose testing should begin at age 25, with earlier testing for those with risk factors. Recent guidelines now recommend starting cardiac screening and cardiovascular risk assessment from the 30s for higher-risk individuals. Anyone with a family history of heart disease, diabetes, hypertension, or a history of smoking should discuss a structured, personalised screening plan with a cardiologist rather than waiting for symptoms to appear.