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Although the overall suicide rate worldwide has changed minimally over the past 100 years, different trends have been observed over time in the USA, Australia, and New Zealand (NZ). However, few studies have focused on suicides in children (< 18 years), making evaluation of possible trends difficult. The last 20 years has also seen an increase in childhood obesity, eating disorders, and body image issues for children in many developed nations; however, few studies have shown whether a significant proportion of child suicides have an abnormal BMI. The current study evaluates child suicides (from 2008 to 2017) in South Australia (Australia), compared with the jurisdictions of Auckland (NZ) and Hennepin County (USA). Demographic data (age, sex, ethnicity), body mass index (BMI), the number of cases of youth suicide, and the method of suicide from these three regions were collected and analyzed. Across the 10-year period, the jurisdiction of Auckland had a downward trend, while Hennepin County and South Australia had increasing numbers of cases. The most common method of child suicide in all centers was hanging, occurring in > 80% of cases in South Australia and Auckland and 56% in Hennepin County. Hennepin County had a greater proportion of suicides using firearms (28%), compared to 1.9% in Auckland and 5.1% in South Australia. Unusual means of suicide were used less frequently by youth than previously., (© 2022. The Author(s).)

One of the hypothesized mechanisms of sudden cardiac death in humans is an arrhythmia precipitated by increased sympathetic outflow to a compromised heart. The stellate ganglia provide the main sympathetic innervation to the heart, where the left stellate ganglion appears to play a role in arrhythmogenesis. Case reports of sudden cardiac death have described left stellate ganglion inflammation but no larger studies have been performed. Thus, we have specifically assessed whether the left stellate ganglion was inflamed in those dying from sudden cardiac death versus other causes of death. Thirty-one left stellate ganglia were resected from cadavers diagnosed with sudden cardiac deaths and compared with 18 ganglia from cadavers diagnosed with non-sudden cardiac deaths. Ganglia were stained with hematoxylin and eosin and lymphocytic aggregates compared. The proportion of left stellate ganglion inflammation (77%) was significantly higher in deaths from sudden cardiac deaths than non-sudden cardiac deaths (33%). This study provides information on a previously recognized, but understudied, structure that may help understand sudden cardiac death. We found high prevalence of stellate ganglion inflammation and propose that this may trigger sympathetic storms., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

To evaluate police and autopsy reports in sudden unexplained deaths in 0-40 year olds. A structured, blind review of police and autopsy reports send to a cardiac genetic service from before (February 2006-December 2007) and after (January-December 2009) new best practice guidelines were introduced in Australia and New Zealand was performed. The reviews focused on reporting on: (1) presentation and clinical history, (2) cardiac autopsy, (3) histological tests and toxicology, and (4) detailed examination of coronary arteries. 110 reports were evaluated against the guidelines. 100 % reported location, 95 % activity at time of death, and 84 % some clinical history. Less than 25 % reported on family history, presence/absence of illicit drugs or alcohol, recorded a possible arrhythmic trigger, or history of fits/faints or collapses. Over 95 % listed heart weight, valvular examinations, pulmonary and some myocardial histology. Less than 50 % commented on septal, LV (left ventricle) and RV (right ventricle) wall thickness. Less than 50 % mentioned site of histology samples, or gave specific description of LV or RV histology or conduction system. Toxicology was not mentioned in a third. Histology of coronary arteries was described in only 18 %. Post guidelines reporting increased in some areas, e.g. in 1-40 year olds: antecedent symptoms (22-61 %), number and location of histology samples (0-47 %), and histology of coronary arteries (6-50 %). Most police and autopsy reports fall short of best practice guidelines. They have improved somewhat after the new guidelines were introduced, but need to be more consistent and particularly need to include significant negative findings.