The Danish Nationwide Electrocardiogram (ECG) Cohort

Area of Science:

• Cardiology
• Biomedical Informatics
• Epidemiology

Background:

• Electrocardiograms (ECGs) are crucial for diagnosing and assessing cardiac disease risk.
• Limited access to large-scale, population-based digital ECG data hinders research.
• Existing datasets often lack comprehensive linkage to health and social registries.

Purpose of the Study:

• To establish the Danish Nationwide ECG Cohort, a comprehensive, population-based dataset of digital ECGs.
• To facilitate large-scale cardiovascular research by linking ECG data with national health registries.
• To provide a resource for studying cardiac disease epidemiology and risk stratification.

Main Methods:

• Inclusion of all patients with at least one digital pre- or in-hospital ECG in Denmark (2000-2021).
• Collection of standardized ECG diagnostic statements and detailed ECG measurements.
• Linkage of ECG data to Danish nationwide administrative health and social registers.
• Longitudinal follow-up without data loss.

Main Results:

• The cohort includes 2,485,987 unique patients and 11,952,430 ECGs.
• Median patient age at first ECG is 57 years, with 48% males.
• Data covers both pre-hospital and in-hospital settings, offering diverse clinical contexts.

Conclusions:

• The Danish Nationwide ECG Cohort is a novel and extensive resource for cardiovascular research.
• The dataset's linkage capabilities and scale support robust epidemiological studies.
• This cohort provides unprecedented opportunities for advancing cardiac disease understanding and management.