SADS and the NHS: What Families Need to Know About Screening

Sudden adult death syndrome (SADS) represents a devastating outcome for families and a complex medico-legal challenge for solicitors. In cardiology medico-legal practice, cases involving SADS often hinge on the adequacy of screening, the timing of referrals, and the interpretation of inherited cardiac conditions. This article provides an expert overview of the clinical frameworks, legal principles, and practical considerations for solicitors acting in claims where SADS is a central issue.

Clinical Context: Sudden Adult Death Syndrome and Inherited Cardiac Conditions

SADS is defined as a sudden, unexpected death in an individual over the age of one year, where no cause is identified following a post-mortem examination. In most cases, SADS is attributed to inherited arrhythmia syndromes or cardiomyopathies, which may not be apparent during routine clinical assessment. Key conditions include:

• Hypertrophic cardiomyopathy (HCM)
• Arrhythmogenic right ventricular cardiomyopathy (ARVC)
• Long QT syndrome (LQTS)
• Brugada syndrome
• Catecholaminergic polymorphic ventricular tachycardia (CPVT)
• Dilated cardiomyopathy (DCM) with arrhythmic potential

These conditions often exhibit autosomal dominant inheritance patterns, meaning first-degree relatives have a 50% chance of carrying the same genetic mutation. The clinical challenge lies in identifying at-risk individuals before a fatal event occurs. Under current NICE guidance, family members of a deceased individual with a confirmed or suspected inherited cardiac condition should be offered specialist assessment, including clinical evaluation, electrocardiogram (ECG), and echocardiography. Genetic testing may also be indicated where a pathogenic mutation has been identified in the deceased.

NHS Screening Pathways: Standards and Variations

The NHS provides structured pathways for the assessment of families affected by SADS, though regional variations in implementation may occur. The principal framework is outlined in the NHS England Service Specification for Inherited Cardiac Conditions, which sets out the following key components:

• Referral to a specialist inherited cardiac conditions service within four weeks of the index event
• Comprehensive clinical evaluation of first-degree relatives, including ECG, echocardiography, and exercise testing where appropriate
• Access to genetic counselling and testing where a pathogenic mutation is identified
• Long-term surveillance for at-risk individuals

In medico-legal practice, disputes often arise regarding the timing and adequacy of referrals. For example, a delay in referring family members for specialist assessment may be alleged as a breach of duty, particularly where a subsequent fatal event occurs in another relative. Expert opinion may address whether the delay fell below the standard expected of a reasonably competent clinician, applying the Bolam v Friern Hospital Management Committee [1957] and Bolitho v City and Hackney Health Authority [1998] tests. The Montgomery v Lanarkshire Health Board [2015] decision is also relevant, as it emphasises the duty to discuss material risks with patients, including the implications of inherited cardiac conditions for family members.

Legal Relevance: Proceedings and Key Considerations

Cases involving SADS may arise in several legal contexts, each with distinct procedural and substantive considerations:

Clinical Negligence Claims

In clinical negligence claims, the focus is typically on whether the NHS failed in its duty to screen or refer family members appropriately. Key stages of the legal process include:

• Pre-action protocol: Early instruction of a cardiology expert witness is critical to assess the merits of the claim. A CPR Part 35-compliant report will address breach of duty, causation, and quantum, where applicable.
• Breach of duty: The expert must determine whether the standard of care fell below that expected of a reasonably competent clinician. This may involve reviewing the timing of referrals, the adequacy of investigations, and the communication of risks to family members.
• Causation: Establishing causation in SADS cases can be challenging, particularly where the deceased had not undergone prior assessment. The expert may need to address whether earlier screening would have identified an at-risk individual and whether intervention (e.g., implantable cardioverter-defibrillator insertion) would have prevented the fatal event. The principles in Bailey v Ministry of Defence [2008] and Williams v Bermuda Hospitals Board [2016] are often relevant in assessing cumulative causation.
• Quantum: Where liability is established, damages may include compensation for bereavement, dependency, and funeral expenses, as well as costs associated with ongoing surveillance for surviving family members.

Coronial Inquests

SADS cases frequently result in a coronial inquest, particularly where the death is sudden and unexplained. The coroner may issue a Prevention of Future Deaths report under regulation 28 of the Coroners (Investigations) Regulations 2013 if systemic failings are identified. Solicitors should be aware of the following:

• The coroner’s role is to determine the medical cause of death, not to attribute blame. However, the inquest process can provide valuable evidence for subsequent civil claims.
• Article 2 of the European Convention on Human Rights may be engaged where there is an arguable breach of the state’s duty to protect life. This can lead to a more expansive inquiry into systemic issues.
• Expert evidence from a consultant cardiologist can assist the coroner in understanding the clinical context, particularly where inherited cardiac conditions are suspected.

Criminal Injuries Compensation Authority (CICA) Claims

In some cases, families may pursue compensation through the CICA, particularly where the death is linked to an inherited condition that was not identified despite prior medical contact. The CICA scheme requires that the death resulted from a crime of violence, which may include gross negligence manslaughter in rare cases. Expert evidence can support the application by establishing the link between the alleged failure and the fatal outcome.

Common Pitfalls and Disputes in SADS Cases

Several recurring issues arise in medico-legal cases involving SADS, each of which may require expert input to resolve:

Delay in Referral

A common allegation is that the NHS failed to refer family members for specialist assessment in a timely manner. Expert opinion will consider whether the delay breached the standard of care, taking into account the following factors:

• The availability of local inherited cardiac conditions services
• The clinical urgency of the case, particularly where multiple family members have been affected
• Whether the deceased had undergone genetic testing, and whether the results were communicated to relatives

For example, if a pathogenic mutation is identified in the deceased, the duty to inform and screen family members is heightened. A failure to do so may constitute a breach of duty, particularly where another relative subsequently dies from the same condition.

Inadequate Investigations

Disputes may arise regarding the adequacy of investigations performed on the deceased or their relatives. Key considerations include:

• Whether a post-mortem examination was conducted, including toxicology and histological analysis
• Whether genetic testing was offered and performed where indicated
• Whether family members underwent appropriate clinical evaluation, including ECG, echocardiography, and exercise testing

Expert evidence may address whether the investigations fell below the standard expected of a reasonably competent service, applying the Bolam and Bolitho tests.

Communication Failures

The Montgomery decision underscores the importance of effective communication in medical practice. In SADS cases, disputes may arise regarding:

• Whether family members were adequately informed of the risks associated with inherited cardiac conditions
• Whether they were advised of the importance of screening and the potential consequences of non-attendance
• Whether the implications of genetic testing were explained, including the psychological and social impact on relatives

Expert opinion may assess whether the communication met the standard expected of a reasonably competent clinician, taking into account the need to tailor information to the individual’s circumstances.

Causation Challenges

Establishing causation in SADS cases can be particularly challenging, as the deceased may not have undergone prior assessment. Key issues include:

• Whether earlier screening would have identified an at-risk individual
• Whether intervention (e.g., medication, lifestyle modification, or device implantation) would have prevented the fatal event
• The role of other contributing factors, such as exercise or emotional stress, in triggering the arrhythmia

The expert may need to address the principles of material contribution and cumulative causation, as set out in Bailey v Ministry of Defence [2008] and Williams v Bermuda Hospitals Board [2016]. In some cases, the “loss of a chance” argument may be relevant, particularly where the deceased had not undergone prior assessment and the likelihood of intervention is uncertain.

The Role of the Expert Witness in SADS Cases

Instructing an experienced cardiology expert witness is pivotal in SADS cases, as the clinical and legal complexities require specialist input. The expert’s role may include:

Screening and Merits Assessment

At the pre-action stage, the expert will assess the merits of the claim by reviewing the clinical records, post-mortem report, and any available genetic testing results. The expert will address:

• Whether the NHS met the standard of care in screening and referring family members
• Whether the investigations performed on the deceased and their relatives were adequate
• Whether the communication of risks to family members was appropriate

The expert’s report will provide a clear opinion on breach of duty and causation, enabling solicitors to advise their clients on the strength of the claim.

Breach of Duty and Causation Reports

Where proceedings are issued, the expert may prepare separate reports on breach of duty and causation. The breach of duty report will focus on whether the standard of care fell below that expected of a reasonably competent clinician, while the causation report will address whether the alleged breach caused or materially contributed to the fatal outcome. The expert must ensure that their report complies with CPR Part 35, including the duty to the court and the requirement to provide an objective, unbiased opinion.

Joint Statements and Single Joint Experts

In some cases, the parties may agree to instruct a single joint expert (SJE) under CPR Part 35.12. The SJE’s role is to provide an independent opinion on the issues in dispute, which may include breach of duty, causation, and quantum. Where separate experts are instructed, the court may direct the preparation of a joint statement under CPR Part 35.14, in which the experts identify the areas of agreement and disagreement. The joint statement process is critical in narrowing the issues for trial and facilitating settlement.

Inquest and Coronial Process

The expert may also assist in the coronial process by providing written or oral evidence to the coroner. The expert’s role is to explain the clinical context, including the potential causes of SADS and the implications for surviving family members. The expert may also address systemic issues, such as the adequacy of NHS screening pathways, which may inform a Prevention of Future Deaths report.

Practical Guidance for Solicitors

For solicitors acting in SADS cases, the following practical considerations may be helpful:

• Early instruction of an expert: Given the complexity of SADS cases, early instruction of a cardiology expert witness is essential. The expert can assist in identifying the key issues, obtaining the necessary records, and preparing a merits assessment.
• Obtaining comprehensive records: Ensure that all relevant clinical records, including post-mortem reports, genetic testing results, and family screening records, are obtained. The expert may need to review records from multiple NHS trusts, particularly where the deceased or their relatives were treated in different regions.
• Considering the coronial process: Engage with the coronial process early, as the inquest can provide valuable evidence for subsequent civil claims. The expert can assist in identifying the key issues for the coroner and preparing questions for witnesses.
• Addressing limitation issues: Be mindful of the Limitation Act 1980, particularly where the claim involves a fatality. The three-year limitation period may run from the date of death or the date of knowledge, depending on the circumstances. Expert evidence can assist in determining the date of knowledge, particularly where the cause of death was not immediately apparent.
• Exploring alternative funding: In some cases, legal aid or alternative funding arrangements may be available, particularly where the claim involves a fatality or significant public interest. The expert’s report can support applications for funding by demonstrating the merits of the claim.

Specialist cardiology medico-legal assessment from an experienced consultant cardiologist expert witness can be pivotal in cases of this nature. The expert’s input can clarify the clinical and legal issues, support the preparation of the claim, and facilitate settlement or trial.