6. Limitations

Regarding the certainty of the time of death, the study limitation is common to that of all sudden death studies, since the time of death, which is mostly reported by a witness, decreasing the accuracy of the data. In most of the times, we ignored the personal history of the patients (previous pathology, concomitant treatment, etc.) because the death occurred suddenly. Also, we do not have previous data from other complementary explorations such as echocardiogram, stress test, and so on in much of the cases.

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