Clinical Scorecard: Impact of Age and Gender on Diagnostic Outcomes of Inherited Cardiac Disorders in Cases of Sudden Arrhythmic Death Syndrome
At a Glance
Category
Detail
Condition
Sudden Arrhythmic Death Syndrome (SADS)
Key Mechanisms
Inherited cardiac conditions including long QT syndrome (LQTS), catecholaminergic polymorphic ventricular tachycardia (CPVT), and Brugada syndrome (BrS) identified via familial evaluation and molecular autopsy
Target Population
Decedents aged 1–64 years with unexplained sudden death and their first-degree relatives
Care Setting
Specialist cardiogenetics clinics and cardiac pathology centers
Key Highlights
Overall diagnostic yield for inherited cardiac conditions was up to 45% when combining familial evaluation and molecular autopsy.
Females had a higher diagnostic yield than males, particularly for LQTS in molecular autopsy.
Diagnostic yield for LQTS and CPVT decreased with increasing age, with highest yield in children and adolescents.
Guideline-Based Recommendations
Diagnosis
Perform comprehensive familial clinical evaluation (FE) of first-degree relatives after a SADS death.
Conduct molecular autopsy (MA) using a 36-gene cardiac panel on post-mortem DNA when available.
Use combined FE and MA approaches to maximize diagnostic yield.
Management
Identify inherited cardiac conditions in asymptomatic family members to prevent further sudden deaths.
Tailor evaluation strategies based on decedent age and sex to improve diagnostic accuracy.
Monitoring & Follow-up
Monitor first-degree relatives with identified inherited cardiac conditions for arrhythmia risk.
Use exercise testing and cardiac imaging as part of familial evaluation.
Risks
Younger decedents have higher risk of LQTS and CPVT diagnoses.
Females have higher likelihood of LQTS diagnosis post-SADS death.
Patient & Prescribing Data
First-degree relatives of SADS decedents undergoing familial evaluation
Identification of inherited cardiac conditions enables targeted preventive interventions to reduce risk of sudden cardiac death.
Clinical Best Practices
Adopt a personalized approach considering age and sex of decedent when evaluating SADS cases.
Use a uniform clinical protocol including ECG, echocardiogram, Holter monitoring, and exercise testing in family members.
Exclude cases with structural heart disease or non-specific cardiac changes from inherited arrhythmia-focused evaluation.
Obtain informed consent and ethical approvals for familial and molecular investigations.
by Belinda Gray, Elijah R Behr, Efstathios Papatheodorou, Athanasios Bakalakos, Hariharan Raju, Yanushi D Wijeyeratne, Gherardo Finocchiaro, Aneil Malhotra, Nicola Whiffin, James S Ware, Maria Tome Esteban, Mary N Sheppard, Sanjay Sharma, Michael Papadakis
