Alex Hughes, the 38-year-old son of former Manchester United striker Mark Hughes, died from sudden adult death syndrome after collapsing in his bedroom, an inquest has heard.
Mr Hughes was discovered on the floor by his two sons on June 19. At an inquest into his death this week, Coroner Victoria Davies recorded that he suffered a "sudden death with a normal heart."
The medical condition, officially termed sudden arrhythmic death syndrome or SADS, refers to an unexpected death caused by cardiac arrest in an individual with no detectable structural heart defects. Cardiac arrest occurs when the heart suddenly stops pumping blood around the body.
Mark Hughes, 62, is one of Welsh football's most celebrated figures, having earned 72 international caps for Wales and scored 163 goals during two spells at Manchester United before managing the Welsh national team and several Premier League clubs.
Understanding sudden arrhythmic death syndrome
SADS claims the lives of between 500 and 800 people in the United Kingdom every year. Although it can strike fit and healthy individuals of any age, it most commonly affects people under the age of 35.
According to the charity Cardiac Risk in the Young (CRY), which promotes cardiac screening and support for families, many victims show no prior warning signs. In approximately one in 20 spontaneous heart-related deaths in the UK, post-mortem examinations fail to reveal a definitive cause.
Standard post-mortem procedures typically identify tissue abnormalities, such as coronary artery disease or a blood clot in the lungs. When no physical defects are identified, the mortality is formally recorded as SADS. The syndrome can also affect children, and experts believe cot death, or sudden infant death syndrome, may share some of the same underlying causes.
CRY explains that SADS is triggered by disturbances in the heart's electrical rhythm, medically known as ventricular arrhythmia. These electrical disruptions can occur even in people who have never suffered from structural heart disease, which is an umbrella term for physical heart defects including structural damage and holes in the heart walls.
In around 40 per cent of SADS cases, the underlying trigger is an ion channelopathy. These are rare genetic conditions, usually inherited from parents, that impair the electrical functioning of the heart without causing physical structural alterations to the organ.
The British Heart Foundation (BHF), the UK's leading cardiovascular research charity, notes that electrical activity in the heart stops immediately after death. Because electrical function cannot be evaluated during a post-mortem examination, identifying the precise cause of cardiac arrest is difficult, leading pathologists to attribute the fatality to SADS.
The four main electrical heart conditions
Cardiac Risk in the Young highlights four primary ion channelopathies responsible for the majority of SADS fatalities.
The first and most common type is Long QT Syndrome (LQTS), which affects approximately one in every 2,000 people in the UK. This indicates that around 30,000 Britons may live with the inherited condition.
Guidance from the National Health Service (NHS), the UK's publicly funded healthcare provider, states that LQTS can cause heart palpitations, where the heart beats irregularly or faster than usual. Patients are also at risk of fainting, seizures, and cardiac arrest if the irregular rhythm persists. Victims of LQTS usually die in their sleep. The NHS notes that roughly half of all people with LQTS experience no symptoms at all.
The second condition is Brugada Syndrome. NHS figures indicate that around one in 5,000 people in England have this inherited condition, which is also frequently symptomless. When symptoms do occur, they include fainting, heart palpitations, cardiac arrest, dizziness, and shortness of breath. Sufferers are also likely to die in their sleep.
The third condition is catecholaminergic polymorphic ventricular tachycardia (CPVT), which affects around one in 10,000 Britons. Passed down genetically, CPVT presents symptoms similar to LQTS and Brugada Syndrome, often first appearing during childhood. CPVT is notoriously difficult to diagnose, and patients are sometimes misdiagnosed with epilepsy. The BHF notes that a patient's heartbeat is usually accelerated by physical or emotional stress.
The fourth ion channelopathy is progressive cardiac conduction defect (PCCD), also known as Lev-Lenegre's Syndrome. While the exact number of Britons living with PCCD is unknown, the BHF explains that the condition causes the heart to beat "very slowly" because electrical signals "cannot travel through your heart as they should." This failure can lead to cardiac arrest due to inadequate blood flow, though it can also cause dangerously rapid heart rhythms. Symptoms include shortness of breath, dizziness, fainting, and blackouts. However, the BHF notes that many individuals with PCCD "live normal lives."
Diagnosis, symptoms and lifestyle recommendations
Ion channelopathies can be identified during life using an electrocardiogram (ECG), a standard medical test that records the electrical activity and rhythm of the heart. For CPVT, doctors may also monitor patients using a 24-hour wearable heart monitor.
Medical authorities recommend specific lifestyle modifications for individuals diagnosed with these conditions. For Long QT Syndrome, patients are urged to consume potassium-rich foods such as bananas, stay well hydrated, manage anxiety, and avoid sudden loud noises like alarm clocks. They are also advised to avoid strenuous exercise and high-caffeine beverages.
Patients with Brugada Syndrome are advised to consult a doctor before taking any medications. However, they should take paracetamol or ibuprofen when feeling unwell to prevent high body temperatures, as fevers can disrupt heart rhythms. They are also instructed to maintain hydration, avoid excessive alcohol intake, and refrain from difficult physical exercise.
Structural heart disease and genetic testing
While ion channelopathies account for 40 per cent of SADS cases, structural heart disease is responsible for 10 to 20 per cent of sudden cardiac deaths. Examples include hypertrophic cardiomyopathy, where the heart muscle becomes abnormally thick; dilated cardiomyopathy, where the heart chambers stretch; and arrhythmogenic right ventricular cardiomyopathy, where heart muscle cells fail to adhere correctly.
Explaining how pathologists handle cases with subtle physical features, CRY states: "In some cases, the pathologist cannot confirm a diagnosis of structural heart disease, either because there is no evidence of it, or because there is not enough evidence and the heart is felt to be relatively normal. So the death will be recorded as SADS. This may happen even in cases where evidence of inherited structural heart disease is subsequently detected in other members of the victim's family. The presence of very subtle structural heart disease in the victim may, however, have been enough to cause sudden cardiac death."
When a family loses a relative to SADS, medical specialists advise that surviving family members undergo genetic testing to evaluate whether they carry inherited cardiac conditions. Because physical exertion can increase the risk of cardiac arrest in susceptible individuals, doctors typically advise diagnosed patients to avoid competitive sports and strenuous exercise routines.
