Inherited heart condition testing

This is genetic testing that looks for gene variants linked to inherited heart conditions such as hypertrophic cardiomyopathy, long QT syndrome, or familial hypercholesterolaemia, usually alongside cardiac assessments like an ECG or echocardiogram. It aims to identify a genetic cause behind a personal or family history of heart problems.

It's typically considered when there's a personal history of unexplained fainting, abnormal heart rhythms, or a family history of sudden cardiac death or diagnosed inherited heart disease. Identifying a genetic cause can help guide your own monitoring and inform whether relatives should also be tested.

There's no fasting or medication adjustment needed for the genetic test itself, though you'll usually have a detailed discussion with a cardiologist or genetic counsellor beforehand about your family history, and you may be asked about relevant relatives' health.

A blood or saliva sample is taken and sent for genetic analysis, often alongside cardiac investigations such as an ECG, echocardiogram or cardiac MRI. Genetic counselling is usually offered before and after testing to help you understand what the results could mean.

The physical sample collection carries minimal risk, similar to a routine blood test. The more significant considerations are emotional and practical, since results can have implications for you and your relatives, which is why genetic counselling is an important part of the process.

Genetic testing typically takes several weeks, as the laboratory analysis is more detailed than a standard blood test, and your cardiologist or genetic counsellor will arrange a follow-up appointment once results are ready.

A positive result identifying a disease-linked gene variant can help explain symptoms and guide monitoring or treatment, and may prompt cascade testing of close relatives who could also carry the variant. A negative result doesn't always rule out an inherited condition, since not every genetic cause is currently known, so clinical monitoring often continues regardless.

NHS genetic cardiology services do offer this testing, usually through specialist inherited cardiac conditions clinics, but referral and waiting times can be lengthy. Private cardiology and genetics services can often arrange assessment and testing more quickly, with cost varying by provider.

Genetic testing is highly accurate at detecting known variants, but not every inherited heart condition has a fully identified genetic cause, so a negative result should be interpreted carefully alongside your clinical picture rather than as a complete reassurance on its own.

You can book a consultation with a private cardiologist who specialises in inherited heart conditions, who will review your history and arrange appropriate testing, often with initial appointments available within days.