Association Between ECG Abnormalities and Mortality in a Low-Risk Population.

Area of Science:

• Cardiology
• Preventive Medicine
• Medical Diagnostics

Background:

• Electrocardiogram (ECG) is a key noninvasive tool for screening cardiovascular disease and arrhythmias.
• The prognostic value of ECG abnormalities in low-risk populations remains uncertain.
• This study investigates the association between ECG findings and mortality in a large cohort.

Purpose of the Study:

• To evaluate the impact of baseline ECG abnormalities on all-cause and cardiovascular mortality.
• To identify specific ECG abnormalities associated with increased mortality risk.
• To clarify the prognostic significance of ECG findings in a general medical check-up population.

Main Methods:

• Retrospective analysis of baseline ECG data from 660,383 patients.
• Classification of ECG abnormalities using the Minnesota Code.
• Assessment of all-cause and cardiovascular mortality over a median follow-up of 8.8 years.

Main Results:

• 3.6% of participants had major and 16.7% had minor ECG abnormalities.
• Major ECG abnormalities correlated with higher all-cause (HR 1.11) and cardiovascular mortality (HR 1.92).
• Specific abnormalities like left atrial enlargement, left ventricular hypertrophy, and atrial fibrillation were significant predictors of cardiovascular mortality.

Conclusions:

• ECG abnormalities are associated with increased cardiovascular mortality in a low-risk population.
• Left atrial enlargement, left ventricular hypertrophy, atrial fibrillation, and major Q-wave/ST-T abnormalities are key indicators.
• ECG screening can identify individuals at higher risk for adverse cardiovascular outcomes.