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Heart Weight Is an Independent Factor Associated With, But Is a Poor Predictor for, Sudden Cardiac Death
Jack Garland1, Kilak Kesha2, Charley Glenn2
1From the Forensic and Analytical Science Service, NSW Health Pathology, New South Wales, Australia.
Insights
Heart weight is an independent factor for sudden cardiac death, but this association weakens after normalization. This finding is crucial for understanding cardiac mortality risks.
Area of Science:
- Cardiology
- Forensic Pathology
- Sudden Cardiac Death Research
Background:
- Enlarged hearts can lead to electrical instability, impaired contractility, fatal arrhythmias, and acute heart failure.
- Sudden cardiac death (SCD) is a significant concern, but postmortem evidence linking heart weight as an independent factor is limited.
Purpose of the Study:
- To investigate whether heart weight is an independent predictor of sudden cardiac death.
- To evaluate the predictive value of normalized heart weight for sudden cardiac death.
Main Methods:
- Retrospective study of 108 adult heart weights over 18 months.
- Hearts were weighed post-dissection, with blood and clots removed, rinsed, and pat-dried.
- Multivariate logistic regression and receiver operating characteristic (ROC) curve analysis were employed.
Main Results:
- Heart weight was identified as an independent factor associated with sudden cardiac death.
- However, after normalization, heart weight showed poor predictive capability for SCD (Area Under the Curve < 0.7 on ROC curve).
Conclusions:
- While heart weight is an independent factor for sudden cardiac death, its predictive power diminishes significantly after normalization.
- Further research may be needed to refine the role of normalized heart weight in assessing SCD risk.
Abstract:
An enlarged heart can cause electrical instability and impaired contractility, leading to fatal arrhythmia and acute heart failure, and is associated with sudden cardiac death. However, there is limited postmortem evidence on whether heart weight is an independent factor associated with sudden cardiac death. This 18-month retrospective study examined 108 adult heart weights in which all the hearts were weighed after dissection, blood and blood clots removed, rinsed in water, and pat dried. The multivariate logistic regression analysis showed heart weight was an independent factor associated with sudden cardiac death. However, after normalization, the heart weight was a poor predictor of sudden cardiac death with an area under the curve less than 0.7 in the plotted receiver operating characteristic curve.
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