Can early diagnostics prevent heart disease?

Partly yes, and cardiovascular disease is the area where this is best evidenced. The mechanism matters: the measurement does not prevent anything, it leads to a treatment that does. An analysis of 26 randomised trials with around 170,000 participants shows that lowering LDL cholesterol by 1 mmol/l reduces the rate of major vascular events by roughly a fifth. The same pattern holds for blood pressure. That completes the chain: finding, treatment, better outcome. It applies to the established risk markers, not automatically to every additional cardiac test.

Blood pressure, a lipid profile including ApoB, Lp(a) once, HbA1c and cardiorespiratory fitness. Those five cover the part with the best-evidenced benefit, and together they are neither expensive nor elaborate. ApoB is worth having alongside LDL because it counts the atherogenic particles and therefore reflects risk more precisely. Lp(a) is genetically determined and therefore only needs measuring once in a lifetime. Anyone who knows and tracks those five has covered the robust part of cardiac prevention.

No. The evidenced part of cardiac prevention runs through laboratory work, blood pressure, vascular ultrasound, ECG and exercise testing. A whole-body MRI sits at evidence tier 3 here: for people without symptoms its benefit is not established, and a finding from it triggers no treatment. It can add structural information, but it replaces none of the values above and does not demonstrably improve risk assessment. If you are coming purely because of your heart, you get the effective part without imaging.

For the basic values there is no reason to wait: blood pressure, lipid profile and HbA1c make sense from adulthood and are included in the statutory health examination from 35. Lp(a) once, the earlier the better, because the value does not change and the consequence has longer to work. Extended diagnostics becomes more relevant with age and with family history. Anyone with a parent or sibling who had an early heart attack should bring the timing forward rather than wait for an age threshold.