(Circulation. 2000;102:649.)
© 2000 American Heart Association, Inc.
Clinical Investigation and Reports |
Sudden Cardiac Death With Apparently Normal Heart
From the Jesse E. Edwards Registry of Cardiovascular Disease, United Hospital, St Paul, Minn, and the University of Minnesota, Minneapolis.
Correspondence to Sumeet S. Chugh, MD, Cardiology UHN-62, Oregon Health Sciences University, 3181 SW Sam Jackson Park Rd, Portland, OR 97201. E-mail chughs{at}ohsu.edu
Background—Mechanisms of sudden cardiac death (SCD) in subjects with apparently normal hearts are poorly understood. In survivors, clinical investigations may not establish normal cardiac structure with certainty. Large autopsy series may provide a unique opportunity to confirm structural normalcy of the heart before reviewing a patient’s clinical history.
Methods and Results—We identified and reexamined structurally normal hearts from a 13-year series of archived hearts of patients who had sudden cardiac death. Subsequently, for each patient with a structurally normal heart, a detailed review of the circumstances of death as well as clinical history was performed. Of 270 archived SCD hearts identified, 190 were male and 80 female (mean age 42 years); 256 (95%) had evidence of structural abnormalities and 14 (5%) were structurally normal. In the group with structurally normal hearts (mean age 35 years), SCD was the first manifestation of disease in 7 (50%) of the 14 cases. In 6 cases, substances were identified in serum at postmortem examination without evidence of drug overdose; 2 of these chemicals have known associations with SCD. On analysis of ECGs, preexcitation was found in 2 cases. Comorbid conditions identified were seizure disorder and obesity (2 cases each). In 6 cases, there were no identifiable conditions associated with SCD.
Conclusions—In 50% of cases of SCD with structurally normal hearts, sudden death was the first manifestation of disease. An approach combining archived heart examinations with detailed review of the clinical history was effective in elucidating potential SCD mechanisms in 57% of cases.
Key Words: death, sudden • pathology • fibrillation
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