Causes and characteristics of unexpected sudden cardiac death in octogenarians/nonagenarians.

The differences in proportions of hypertensive myocardial disease or myocarditis as autopsy findings did not reach statistical significance between SCD victims ≥ 80 years and those < 80 years (3.7% vs. 5.5%, P = 0.051, 0.4% vs. 1.1%, P = 0.08, respectively) ( Table 1 ).

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