Sudden Cardiac Death With Apparently Normal Heart
Why the study?
What are the mechanisms and clinical circumstances of sudden cardiac death in patients with structurally normal hearts?
Population
270 archived hearts of patients who had sudden cardiac death, including a subset of 14 patients with…
Design
Case_series
Authors
Discussion
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Member takes
Implication
Alerts clinicians that SCD may be first disease sign in normal hearts; case reports leave open standardized evaluation protocols.
Key Points
- To investigate the underlying mechanisms and clinical profiles of sudden cardiac death in decedents confirmed by postmortem examination to have structurally normal hearts.
- Reexamined a 13-year series of 270 archived hearts from patients who died of sudden cardiac death (190 male, 80 female; mean age 42 years).
- Conducted detailed reviews of medical histories, death circumstances, electrocardiograms, and postmortem toxicology for cases confirmed to have no structural cardiac abnormalities.
- Of 270 archived sudden cardiac death cases, 14 (5%; mean age 35 years) possessed structurally normal hearts, and sudden cardiac death was the primary manifestation of disease in 7 of these 14 cases (50%).
- Potential death mechanisms were determined in 8 of the 14 cases (57%), featuring non-overdose serum substances (n=6, with 2 having established associations with sudden death), electrocardiographic preexcitation (n=2), and comorbidities of seizure disorder (n=2) and obesity (n=2).
- No identifiable clinical conditions or predisposing factors could be found in the remaining 6 structurally normal cases (43%).
Structured PICO
What are the mechanisms and clinical circumstances of sudden cardiac death in patients with structurally normal hearts?
P
Population
270 archived hearts of patients who had sudden cardiac death (190 male, 80 female, mean age 42 years), including a subset of 14 patients with structurally normal hearts (mean age 35 years).
I
Intervention
Postmortem examination combined with detailed review of clinical history, ECGs, and circumstances of death.
O
Outcome
Identification of potential mechanisms and clinical circumstances of sudden cardiac death.
In patients with sudden cardiac death and structurally normal hearts, sudden death is often the first manifestation of disease, but a combined autopsy and clinical review can identify potential mechanisms in over half of cases.
Cite This Study
Chugh et al. (2000) studied this question.