Sudden adult death: An autopsy series of 534 cases with gender and control comparison

Characterization of a novel SCN5A mutation associated with long QT syndrome and arrhythmogenic right ventricular cardiomyopathy in a family

Sudden cardiac death represents a significant diagnostic challenge for forensic pathologists, particularly in inherited arrhythmia syndromes or cardiomyopathies resulting from genetic defects. Molecular autopsies can reveal the underlying molecular etiology in such cases. In this study, we investigated a family with a history of sudden cardiac death to elucidate the molecular basis responsible for sudden cardiac death. The proband underwent a comprehensive forensic examination. Family members received thorough clinical evaluations, including electrocardiogram, Holter monitoring, echocardiography, and cardiac magnetic imaging. Whole exome sequencing and genetic analysis were performed on the deceased and her parents. In addition, Western blotting and patch-clamp recordings were employed to evaluate the expression and function of the mutant protein in vitro. Forensic examination diagnosed arrhythmogenic right ventricular cardiomyopathy (ARVC) as the cause of sudden death. Genetic analysis identified a novel missense mutation in SCN5A (p.V1323L), which was assessed as likely pathogenic by the ACMG guideline. Another family member carrying the mutation manifested long QT syndrome and mild cardiac fibrosis. The cellular electrophysiological study demonstrated that the mutation resulted in an enhanced late sodium current, suggesting it was a gain-of-function mutation. This study characterizes a novel SCN5A mutation that putatively causes long QT syndrome and may contribute to the development of ARVC. Our work expands the pathogenic spectrum of SCN5A variants and underscores the importance of molecular autopsy in sudden death cases, especially in those with suspected genetic disorders.

Viral infection and sudden non-cardiac death: A systematic review

INTRODUCTION

Sudden non-cardiac death (SNCD) is a clinical entity comprising deaths lacking previous clinically significant symptoms, and in which the mechanisms of death do not involve the heart. Infection is a major cause of SNCD, particularly in children, and viruses are frequently involved in the disease process. Nevertheless, SNCD of viral infectious causes remains poorly characterized. Thus, a systematic review of the literature describing the association between viral infection and the development of SNCD was performed.

METHODS

PRISMA statement guidelines were followed in this systematic review. A literature search was conducted across MEDLINE, Scopus and Web of Science databases. Studies considered eligible were autopsy series or cohort studies of sudden death cases, in which evidence of viral disease as a cause of death was demonstrated, along with identification of causative agents.

RESULTS

Twelve studies published between 1996 and 2020 were included in this review. Selected studies were categorized into three groups according to the study population: infants and young children (up to four years of age); presumed sudden infant death syndrome patients; and older individuals (five years of age and older). SNCD with viral implication represents a minority of sudden death cases in all age groups, with infants and young children having a higher prevalence across studies. Respiratory infection was the main cause of viral SNCD, with influenza virus and respiratory syncytial virus being the most commonly identified agents in older individuals, and infants and young children respectively. Disseminated infection, gastrointestinal infection, and meningitis were other identified causes of SNCD in children.

CONCLUSIONS

No studies have directly assessed the frequency and causes of viral SNCD. Infants and young children show a considerable, but variable, prevalence of this clinical entity. Wider implementation of post-mortem virological molecular testing may help uncover previously unknown cases. More research into viral SNCD is needed, especially in the adult population.

Sudden Cardiac Death-Etiology, Risk Factors and Demographic Characteristics: An Extensive Study of 1618 Forensic Autopsies

BACKGROUND

Sudden cardiac death (SCD) is a major public health concern worldwide, affecting all age and social groups.

METHODS

In this retrospective study, of the 8265 autopsies performed in the Institute of Legal Medicine, 1618 cases of SCD were included. The aim of this study is to identify demographic characteristics, etiological factors, epidemiological characteristics and risk factors that lead to SCD.

RESULTS

The highest incidence of SCD was in age group 40-69 years (65.0%), 71.6% of this age group being men. Of the total number, 32.1% (520) occurred in the emergency room. The most common cause of sudden death is represented by coronary atherosclerotic disease, reported in 89.8% (1453) of cases, tricoronary lesions being found in 60% (870) of cases. Etiological factors of SCD encountered during autopsies were acute myocardial infarction in 13.9% (225), dilated cardiomyopathy 43.9% (710), cardiac hypertrophy 579 (36.07%), pericarditis 1.9% (30), myocarditis 1.73% (28) and adipositas cordis 5% (81). Along with epicardial fat and BMI, alcohol consumption was recorded in 17.9% (290), this being a potential trigger.

CONCLUSIONS

Based on forensic autopsy and histological findings, a wide variety of factors are involved in the etiopathogenesis of SCD, some of which can be eliminated through preventive measures implemented early.

Postmortem genetic analysis of 17 sudden cardiac deaths identified nonsense and frameshift variants in two cases of arrhythmogenic cardiomyopathy

Sudden death, or unexpected natural death of a healthy individual, is a serious problem in all nations. Sudden cardiac death (SCD) mainly due to ischemic heart diseases is the top cause of sudden death. However, there are pathophysiological conditions, referred to as sudden arrhythmic death syndrome, in which no apparent lesion can be identified even after complete conventional or ordinary autopsy. While postmortem genetic analyses have accumulated evidence about underlying genetic abnormality in such cases, the precise relationships between genetic background and the phenotype have been largely elusive. In this study, a retrospective investigation of 17 autopsy cases in which lethal arrhythmia was suspected to be the cause of death was carried out. Genetic analysis focusing on 72 genes reported to be associated with cardiac dysfunctions was performed, in combination with detailed histopathological and postmortem imaging examination, and a family study. As a result, in two cases of suspected arrhythmogenic cardiomyopathy (ACM), we found a nonsense variant in PKP2 and frameshift variant in TRPM4 gene. In contrast, the other 15 cases showed no morphological changes in the heart despite the presence of a frameshift variant and several missense variants, leaving the clinical significance of these variants obscure. The findings of the present study suggest that nonsense and frameshift variants could be involved in the morphological abnormality in cases of SCD due to ACM, while missense variants alone rarely contribute to massive structural changes in the heart.

Thoracic Aortic Aneurysm and Dissection: Review and Recommendations for Evaluation

ABSTRACT

Aortic dissection and rupture (collectively termed "sudden aortic death") are commonly encountered by forensic pathologists, with an estimated incidence at autopsy between 0.6% and 7.7%. Despite this, there is no standard of practice for the evaluation of sudden aortic death at autopsy.Recent studies have shown 20% of patients with thoracic aortic aneurysm or dissection (TAAD) have an identifiable genetic syndrome, and 19% will have an affected first-degree relative. The past 2 decades have seen identification of new culprit genes and syndromes, which can have subtle or nonexistent external phenotypes. A high index of suspicion is warranted to identify possible hereditary TAAD (H-TAAD), allowing family members to obtain screening to avoid catastrophic vascular events. Forensic pathologists need broad knowledge of the spectrum of H-TAAD and awareness of the relative significance of hypertension, pregnancy, substance use, and microscopic changes of aortic architecture.This article reviews the common subtypes of H-TAAD, including Marfan syndrome, vascular Ehlers-Danlos, Loeys-Dietz, and familial thoracic aortic aneurysm and dissection. Recommendations for the evaluation of sudden aortic death at autopsy are presented, including (1) performance of a complete autopsy, (2) documentation of aortic circumference and valve morphology, (3) notifying family of the need for screening, and (4) preservation of a sample for potential genetic testing.

Sex Differences in Incidence and Outcome of Out-of-Hospital Cardiac Arrest Within a Local Health Network

Introduction

Sex and gender differences in presentation and characteristics of out-of-hospital cardiac arrest (OHCA) are established in cohorts with presumed cardiac aetiology but not non-cardiac etiology. This study investigated the effect of sex on incidence and outcome of OHCA according to presumed and adjudicated aetiology within a local health network.

Methods

Population-based observational cohort study of emergency medical services (EMS) attended OHCAs within an Australian local health network. Cases identified from an EMS registry between 2012-2016 were linked to a hospital registry. Age-standardised incidence and baseline characteristics were stratified by sex for EMS-treated OHCA, non-EMS witnessed presumed cardiac and obvious non-cardiac sub-cohorts, and hospitalised cases. Logistic regression was used to explore the primary outcome of survival to hospital discharge.

Results

We identified 2,024 EMS-attended and 780 EMS-treated OHCAs. The non-EMS witnessed sub-cohorts comprised 504 presumed cardiac and 168 obvious non-cardiac OHCAs. Adjudicated aetiology was recorded in 123 hospitalised cases. Age-standardised incidence for women was almost half that of men across all groups. Across cohorts, women were generally older and arrested with a non-shockable initial rhythm in an area of low socioeconomic status. There was no sex difference in the primary outcome for the main EMS-treated cohort or in the non-cardiac sub-cohorts. The sex difference in outcome in the presumed cardiac sub-cohort was not present after multivariable adjustment.

Conclusions

There are sex differences in incidence and outcome of EMS-treated OHCA that appear to be driven by differences in susceptibility to cardiac arrhythmias and underlying etiology, rather than treatment delays or disparities.

Sudden unexpected non-cardiac death in the Genoa Medico-Legal District: A six year study (2014-2019) and literature review

Sudden death is described as a natural but unexpected death occurring within one hour from the onset of the patient's final symptoms. Despite cardiac disease being recognised as the cause of death in most people, sudden and unexpected death can also be non-cardiac related. Often a natural but sudden death is not subject to an autopsy, but only to an external examination, and this runs the risk of wrongly attributing the death to a cardiac cause. The present review is a retrospective-observational study which looks into the cases of sudden non-cardiac death recorded in the Genoa District (Italy) from 2014 to 2019 and investigated through complete autopsy examinations. Amongst these cases, 39 (31.5%) were attributable to gastrointestinal diseases, mostly due to the rupture of oesophageal varices; 39 (31.5%) to respiratory diseases, especially pulmonary infections; 31 (25%) to peripheral vascular disease, mostly attributable to pulmonary thromboembolisms or the acute dissection of aneurysms whilst the remaining 15 cases (12%) were attributable to intracranial haemorrhages.

Anatomical-MRI Correlations in Adults and Children with Arrhythmogenic Right Ventricular Cardiomyopathy

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a rare disease in which the right ventricular myocardium is replaced by islands of fibro-adipose tissue. Therefore, ventricular re-entry circuits can occur, predisposing the patient to ventricular tachyarrhythmias, as well as dilation of the right ventricle that eventually leads to heart failure. Although it is a rare disease with low prevalence in Europe and the United States, many patients are addressed disproportionately for cardiac magnetic resonance imaging (MRI). The most severe consequence of this condition is sudden cardiac death at a young age due to untreated cardiac arrhythmias. The purpose of this paper is to revise the magnetic resonance characteristics of ARVC, including the segmental contraction abnormalities, fatty tissue replacement, decrease of the ejection fraction, and the global RV dilation. Herein, we also present several recent improvements of the 2010 Task Force criteria that are not included within the ARVC diagnosis guidelines. In our opinion, these features will be considered in a future Task Force Consensus.

African particularities of sudden adult death in Togo on autopsy cases

Background

The purpose of the study was to determine the circumstances of occurrence of these sudden deaths, risk factors, to identify the causes of sudden death in adults at autopsy, with a view to improving prevention.

Methods

This is a retrospective study of the cases of sudden death that were the subject of an autopsy in the pathology anatomy department of the University Hospital Sylvanus Olympio in Lomé from 2009 to 2018.

Results

A total of 318 sudden death cases were recorded. The sex ratio (M/F) was 1.8, and the mean age was 43 ± 0.36 years. Sudden deaths were the second most common reason for autopsies after traffic accidents. The place of death was home in 76.7% of cases and in hospitals in 23.3%. Obesity was noted in 59.4%, with an umbilical adipose panicle varying between 7 and 12 cm thick. Cardiovascular causes excluding cerebral involvement (n = 173 cases, 54.40%) followed by pulmonary causes (n = 100 cases, 31.44%) were the most common cause of sudden death. The predominant cardiac pathology was infarction accounting for 32.07% of all causes of sudden death, and pulmonary embolism with 19.49% was the leading cause at the pulmonary level.

Conclusion

The victims of sudden death in Togo are relatively young, predominantly male and predominantly obese. The main causes of sudden death were myocardial infarction followed by pulmonary embolism. The prevention of sudden death remains paramount, especially in the African context, where pre-hospital care is often inadequate.

Evaluation of histopathological findings of cardiac deaths in forensic autopsies

BACKGROUND

The vast majority of sudden and unexpected natural deaths are related to cardiovascular diseases, especially coronary artery diseases.

AIMS

In this study, we aimed to reveal the epidemiological differences between men and women and to investigate the most common pathologies that cause cardiac deaths.

METHODS

Five thousand seven hundred sixty-eight autopsy cases that were done in 2016 were reviewed for the autopsy information and histopathological findings. Of the 5768 autopsies performed, 866 were due to cardiac causes. Eight hundred thirty-two cases were reviewed due to lack of autopsy information in 34 cases.

RESULTS

One hundred sixteen (13.9%) were female, and 716 (86.1%) were male. Coronary artery disease was detected in 760 of 832 cases. There were findings of acute or previous myocardial infarction in 595 (71.5%), perivascular and interstitial fibrosis in 159 (19.1%), myocardial rupture and tamponade in 31 (%3.7), valvular disease in 6 (0.7%), cardiomyopathy in 4 (0.5%), and congenital heart disease in 3 (0.4%). In the study, it was observed that the mean age of death due to cardiac pathology other than coronary artery disease was significantly lower than deaths due to coronary artery disease (p < 0.05). The presence of coronary artery disease in men was found to be significantly higher than in women (p < 0.001).

CONCLUSION

In our study, it was found that deaths due to coronary artery disease are seen at an older age than cardiac deaths other than coronary artery disease. In addition, in line with current knowledge, it has been confirmed that the mortality rate of coronary artery disease is higher in men than in women.

[Fighting against unexplained sudden death]

Sudden cardiac death, mostly related to ventricular arrhythmia, is a major public health issue, with still very poor survival at hospital discharge. Although coronary artery disease remains the leading cause, other etiologies should be systematically investigated. Exhaustive and standardized exploration is required to eventually offer specific therapeutics and management to the patient as well as his/her family members in case of inherited cardiac disease. Identification and establishing direct causality of the detected cardiac anomaly may remain challenging, underlying the need for a multidisciplinary and experimented team.

[A retrospective mortality analysis of natural deaths of the 65+ generation based on postmortem autopsies performed at the Institute of Legal Medicine in Frankfurt am Main during two periods]

BACKGROUND AND AIM OF THE STUDY

In Germany, a constant demographic change is taking place, which leads to an increasing aging of the society. The present study aimed to analyze natural deaths occurring at an age of ≥ 65 years, since health vulnerability in this age group is gaining importance.

MATERIAL AND METHODS

Autopsy reports of the Institute of Forensic Medicine, University Hospital of the Goethe University Frankfurt/Main, Germany, were retrospectively evaluated regarding natural death cases of ≥ 65-year-olds in a time comparison (period I: 2000-2002; period II: 2013-2015).

RESULTS

During both periods, a total of 1206 autopsies concerning this age group were performed. Among these, 404 cases (33.5%) of unnatural death and 39 cases (3.2%) of a combination of natural and unnatural death were recorded; in 94 cases (7.8%), the manner of death could not be elucidated. The majority (n = 669; 55.5%) included cases of natural death. In the largest group of these (n = 350; 52.3%), cardiac causes of death were predominant, followed by 132 (19.7%) respiratory and 47 (7.0%) abdominal causes of death. In addition, 37 (5.5%) cases of malignant neoplasms, 33 (4.9%) of ruptures of large vessels, 33 (4.9%) of cerebral, and 37 (5.5%) other cases of natural death were noted. A significant decrease of cardiac causes of death was observed in the comparison of periods I and II. In particular, there was a significant decrease in high-grade occlusive coronary sclerosis. Moreover, there were significant differences between both sexes. Men had significantly more bypasses, stents and heart scars and suffered a myocardial infarction about 10 years earlier than women.

CONCLUSION

The results of the present study are largely consistent with the literature. The decrease in numbers of cardiac deaths may be attributed to increasingly better medical care and to a significantly higher rate of stent implantation. Especially in times of pandemics, the role of forensic gerontology will become more important.

Patient Characteristics of Persons Dead on Arrival Received in a Danish Emergency Department: A Retrospective Review of Health Records

INTRODUCTION

In addition to treating living patients, emergency nurses are also responsible for receiving and caring for persons who are dead on arrival and their relatives. There is limited knowledge about the dead on arrival patient and family population as well as care practice for the dead and their relatives. The first step in improving care for dead on arrival persons is to know the size and characteristics of the population. Therefore, the aim of this study was to describe the size and characteristics of the dead on arrival population in a Danish emergency department.

METHODS

A retrospective review of health records was undertaken for all consecutive dead on arrival persons received in 1 Danish emergency department between January 2018 and December 2019.

RESULTS

A total of 719 dead on arrival persons were included, 350 in 2018 and 369 in 2019. Males accounted for 64%. The mean age was 71 years with a range from 18 to 102 years. The place of death was 80% at home, and more than half (54%) were found either dead or dying by a spouse, cohabitant, or son/daughter. In most cases, the cause of death was described as unknown (92%), whereas suicide and accidents accounted for 8%.

DISCUSSION

The population of dead on arrival persons in a Danish emergency department were mainly men, found dying or dead by relatives and brought in from home. Additional research and development are warranted regarding care practices for dead on arrival and their families in the emergency department.

[Sudden cardiac death in women, data from the northern Tunisian sudden cardiac-death registry]

BACKGROUND

Sudden cardiac death is a major public health problem. Epidemiological and clinical differences according to gender have been described in sudden cardiac death. The aim of this study was to examine the gender differences between autopsy findings and circumstance of occurrence associated with sudden cardiac death.

METHODS

We prospectively collected epidemiological and autopsy data of victims of sudden cardiac death occurring in the northern governorates of Tunisia between January 2013 and December 2019. Symptoms preceding death, circadian, weekly and seasonal variations of sudden death were also analyzed.

RESULTS

The study population included 1834 men and 468 women with a mean age of 56.5±14.2 years. All cardiovascular risk factors except smoking were significantly more frequent among women but ischemic heart disease was the most common cause of death in men (51.3 %, versus 28 %, P<0.001). Women were more likely to have a negative macroscopic autopsy than men (34 % versus 23.6 %, P<0.001). Chest pain preceding sudden death was more frequent in male (24 % versus 13.2 %, P<0.001). In contrast, women were more likely to have dyspnea (8.1 % versus 15.6 %, P<0.001). Sudden death in women occurred indoors more often than in men (63.9 % versus 54.5 %, P<0.001) and also more often during night (midnight to 6 am). We also recorded an excess cardiac mortality in winter in both sexes.

CONCLUSIONS

Women had considerably more cardiovascular risk factors and more commonly negative macroscopic autopsy. Death occurred indoors and during night more often than in men.

Catheter Ablation of Ventricular Tachycardia in Patients With Arrhythmogenic Right Ventricular Cardiomyopathy/Dysplasia: A Sequential Approach

Background

It has been suggested that endocardial and epicardial ablation of ventricular tachycardia (VT) improves outcome in arrhythmogenic right ventricular cardiomyopathy/dysplasia. We investigated our sequential approach for VT ablation in patients with arrhythmogenic right ventricular cardiomyopathy/dysplasia in a single center.

Methods and Results

We included 47 patients (44±16 years) with definite (81%) or borderline (19%) arrhythmogenic right ventricular cardiomyopathy/dysplasia between 1998 and 2016. Our ablation strategy was to target the endocardial substrate. Epicardial ablation was performed in case of acute ablation failure or lack of an endocardial substrate. Single and multiple procedural 1‐ and 5‐year outcome data for the first occurrence of the study end points (sustained VT/ventricular fibrillation, heart transplant, and death after the index procedure, and sustained VT/ventricular fibrillation for multiple procedures) are reported. Eighty‐one radiofrequency ablation procedures were performed (mean 1.7 per patient, range 1–4). Forty‐five (56%) ablation procedures were performed via an endocardial, 11 (13%) via an epicardial, and 25 (31%) via a combined endo‐ and epicardial approach. Complete acute success was achieved in 65 (80%) procedures, and partial success in 13 (16%). After a median follow‐up of 50.8 (interquartile range, [18.6; 99.2]) months after the index procedure, 17 (36%) patients were free from the primary end point. After multiple procedures, freedom from sustained VT/ventricular fibrillation was 63% (95% CI, 52–75) at 1 year, and 45% (95% CI, 34–61) at 5 years, with 36% of patients receiving only endocardial radiofrequency ablation. A trend (log rank P=0.058) towards an improved outcome using a combined endo‐/epicardial approach was observed after multiple procedures.

Conclusion

Endocardial ablation can be effective in a considerable number of arrhythmogenic right ventricular cardiomyopathy/dysplasia patients with VT, potentially obviating the need for an epicardial approach.

Genetic variants of uncertain significance: How to match scientific rigour and standard of proof in sudden cardiac death?

In many SCD cases, in particular in pediatric age, autopsy can be completely negative and then a post-mortem genetic testing (molecular autopsy) is indicated. In NGS era finding new/rare variants is extremely frequent and, when only variants of unknown significance are found, molecular autopsy fails to find a cause of death. We describe the emblematic case of the sudden death of a 7-year-old girl. We performed a full-body micro-CT analysis, an accurate autopsy, a serum tryptase test and toxicological tests. Since the only macroscopic abnormality we found was a myocardial bridging (length: 1,1 cm, thickness: 0,5 cm) of the left anterior descending coronary artery, a molecular autopsy has been performed. NGS analysis on victim DNA detected rare variants in DPP6, MYH7, SCN2B and NOTCH1 and segregation analysis was then achieved. On the basis of ACMG/AMP (clinical) guidelines, all the found variants were classified as of unknown significance. In other words, both the macroscopic and genetic anomalies we found were of uncertain significance and then the autopsy failed to find the cause of the death. Our case raises three main discussion points: (a) economical, ethical and legal limitations of genetic investigation; (b) risk that genetic testing does not succeed in finding a certain cause of the death; (c) absence of specific guidelines to face the problem of VUS in forensic cases.

How to care for the brought in dead and their relatives. A qualitative study protocol based on interpretive description

AIM

This project has two aims: (a) What do relatives to brought in dead (BID) describe as helpful and supportive care when they arrive at the emergency department to see and say goodbye to a deceased? (b) What do nurses describe as good nursing practice for BID persons and their relatives and what may hinder or facilitate this practice in an emergency setting?

DESIGN

A qualitative study in the methodology interpretive description.

METHODS

Data will be collected through three data sources: Individual interviews with relatives to BID persons, participant observations of relatives to BID persons during their presence in the emergency department and focus group interviews with emergency nurses.

DISCUSSION

Brought in dead persons and their relatives are received and cared for in emergency departments by emergency nurses. Knowledge of how to render care for the relatives to BID persons in an acute setting including what skills and competences this require of the nurses is warranted. We need to explore, describe, and comprehend the experiences of both the relatives and the nurses to point out potential areas of improvement.

IMPACT

This study is a protocol of an Interpretive Description study offering insight into considerations and reflections in designing the study.

Bioinformatics analysis of sex differences in arrhythmogenic right ventricular cardiomyopathy

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited disease that exhibits sex differences on clinical presentation. The present study aimed to investigate the sex differences associated with ARVC by conducting an integrated bioinformatics analysis. The GSE29819 gene expression dataset was downloaded from the Gene Expression Omnibus database. The online analytical tool GEO2R was then used to screen for differentially expressed genes (DEGs), which were subsequently processed using enrichment analysis and protein‑protein interaction (PPI) network construction. Functional annotation of the DEGs was determined using ClueGO. The PPI network was constructed with Search Tool for the Retrieval of Interacting Genes, and was visualized with Cytoscape to identify the modules and hub genes. Compared with the female group, a total of 1,188 DEGs, of which 915 were upregulated and 273 were downregulated, were identified in the male group. The enrichment analysis revealed that in KEGG pathways, the upregulated DEGs were substantially enriched in the 'nicotine addiction' pathways, whereas the downregulated DEGS were mainly enriched in the 'ECM‑receptor interaction' and 'protein digestion and absorption' pathways. The PPI network contained 899 nodes and 1,627 edges, among which four significant modules were identified. In addition, kininogen 1, lysophosphatidic acid receptor 5, formyl peptide receptor (FPR) 2, adenylate cyclase 2, γ‑aminobutyric acid type B receptor subunit 2, FPR1, hydroxycarboxylic acid receptor 1, prostaglandin E receptor 3, cannabinoid receptor 1 and proenkephalin were identified as the top 10 hub genes. The key genes and related pathways identified in this study provide genetic insight into the diversity in phenotypes between female and male patients with ARVC, and may facilitate therapeutic individualization.

A systematic review exploring the relationship between infection and sudden unexpected death between 2000 and 2016: A forensic perspective

Death due to infectious diseases is a major health concern worldwide. This is of particular concern in developing countries where poor-socio economic status and a lack of healthcare resources contribute to the high burden of disease. In some cases death due to infection can be acute and aggressive, and death may occur without a diagnosis whilst the person is still alive. These deaths may ultimately lead to a medico-legal autopsy being performed. There are various mechanisms by which sudden death due to infection may occur. In addition, there are many risk factors associated with sudden death due to infection, which differ between infants and older individuals. However, it is unclear which pathogens and risk factors are most frequently associated with sudden death due to infection. Therefore a systematic review of articles and case reports published between 1 January 2000 and 30 June 2016 was undertaken in order to (1) explore the relationship between pathogens and their causative role and (2) identify the relationship between predisposing and/or risk factors associated with sudden death due to infection. Major databases were searched and after critical appraisal 143 articles were identified. It was found that respiratory infections and deaths involving bacterial pathogens were most commonly associated with these deaths. In addition the most common risk factors in infants were exposure to tobacco smoke and co-sleeping. In adults the most common risk factors were co-morbid conditions and illnesses. This information aids in a better understanding of these deaths and highlights the need for more research in this field, particularly in developing countries.

Causes of Mortality in Older People With Intellectual Disability: Results From the HA-ID Study

We aim to provide insight into the cause-specific mortality of older adults with intellectual disability (ID), with and without Down syndrome (DS), and compare this to the general population. Immediate and primary cause of death were collected through medical files of 1,050 older adults with ID, 5 years after the start of the Healthy Ageing and Intellectual Disabilities (HA-ID) study. During the follow-up period, 207 (19.7%) participants died, of whom 54 (26.1%) had DS. Respiratory failure was the most common immediate cause of death (43.4%), followed by dehydration/malnutrition (20.8%), and cardiovascular diseases (9.4%). In adults with DS, the most common cause was respiratory disease (73.3%), infectious and bacterial diseases (4.4%), and diseases of the digestive system (4.4%). Diseases of the respiratory system also formed the largest group of primary causes of death (32.1%; 80.4% was due to pneumonia), followed by neoplasms (17.6%), and diseases of the circulatory system (8.2%). In adults with DS, the main primary cause was also respiratory diseases (51.1%), followed by dementia (22.2%).

Genetic Testing in Inherited Heart Diseases: Practical Considerations for Clinicians

PURPOSE OF REVIEW

Genetic testing has become an important element in the care of patients with inherited cardiac conditions (ICCs). The purpose of this review is to provide clinicians with insights into the utility of genetic testing as well as challenges associated with interpreting results.

RECENT FINDINGS

Genetic testing may be indicated for individuals who are affected with or who have family histories of various ICCs. Various testing options are available and determining the most appropriate test for any given clinical scenario is key when interpreting results. Newly published guidelines as well as various publicly accessible tools are available to clinicians to help with interpretation of genetic findings; however the subjectivity with respect to variant classification can make accurate assessment challenging. Genetic information can provide highly useful and relevant information for patients, their family members, and their healthcare providers. Given the potential ramifications of variant misclassification, expertise in both clinical phenotyping and molecular genetics is imperative in order to provide accurate diagnosis, management recommendations, and family risk assessment for this patient population.

[Sudden cardiac death: Are women different?]

Sudden cardiac death is a major public health problem with around 40,000 cases per year in France. Epidemiological, clinical and prognostic differences according to gender have been described in most cardiovascular diseases, including sudden cardiac death. In this article, we will review gender differences in sudden cardiac death incidence, circumstance of occurrence, management, and prognosis.

[Sudden cardiac death related to coronary artery disease. Is the risk different for women?]

Sudden cardiac death is a major public health issue, with high incidence and disappointing survival. Therefore, prevention of sudden death and identification of high-risk patients are essential tools, especially in the field of coronary artery disease, which is the main cause of sudden death. Prevalence of coronary artery disease is higher among men, leading to a higher rate of coronary artery disease-related sudden cardiac death. The current issues are identification of gender-specificities regarding coronary artery disease, rhythmic complications and management.

Prevalence of Sudden Death in Palliative Care: Data From the Australian Palliative Care Outcomes Collaboration

CONTEXT

Advanced, life-limiting illnesses are likely to have a predictable functional decline through a terminal phase to death, but some patients may also die suddenly. To date, empirical evidence characterizing "sudden death" in hospice/palliative care is lacking.

OBJECTIVES

The aim of this study was to determine prevalence and clinicodemographic predictors of sudden death in hospice/palliative care.

METHODS

This is a longitudinal consecutive cohort study of prospectively collected national data in 104 specialist palliative care services from the Australian Palliative Care Outcomes Collaboration. Patients who died between July 1, 2013, and June 30, 2014, with one or more measurement of Australian-modified Karnofsky Performance Status (AKPS) in the last 30 days of life were included. "Sudden death" was defined as a lowest AKPS score of 50 or more in the last seven days of life and excluded anyone with "terminal phase" as their last phase before death. Predictors were defined using logistic regression.

RESULTS

In total, 13,966 patients were included, mean age 73.6 (SD 13.6) years, 46% women, and 77% had cancer. During the seven days before death, there were 20,992 AKPS measurements; median 1 (interquartile range 1-2) per patient. Four percent of deaths (one of 25) were sudden, predicted independently by having lung cancer (odds ratio [OR] 2.64), cardiovascular disease (OR 1.94), other cancers (OR 1.63), being male (OR 1.23), younger, worse fatigue, and worse breathlessness. Sudden death was associated with higher rates of death at home (OR 3.2; 95% CI 2.9 to 3.6).

CONCLUSION

This study quantifies rates of sudden death in hospice/palliative care and has implications for conversations about prognosis between clinicians, patients, and their families.