Improved detection of echocardiographic left ventricular hypertrophy using a new electrocardiographic algorithm

Area of Science:

• Cardiology
• Medical Diagnostics
• Biomedical Engineering

Background:

• Electrocardiogram (ECG) voltage criteria for left ventricular hypertrophy (LVH) detection are increasingly important.
• The Cornell ECG voltage correlates with echocardiographic left ventricular mass but varies with age and obesity.
• A need exists for adjusted ECG voltage criteria to improve LVH detection accuracy.

Purpose of the Study:

• To develop and validate a gender-specific, age- and obesity-adjusted electrocardiogram (ECG) voltage criterion for left ventricular hypertrophy (LVH) detection.
• To improve the diagnostic performance of the Cornell voltage criterion using the Framingham Heart Study database.

Main Methods:

• Linear regression was used to estimate an adjustment formula from data on 1,468 men and 1,883 women from the Framingham Heart Study.
• Participants were free of myocardial infarction and had concurrent ECG and echocardiogram recordings.
• A modified receiver operating characteristic curve method compared the sensitivity and specificity of the adjusted versus unadjusted criteria.

Main Results:

• The adjusted Cornell voltage criterion demonstrated significant improvements in sensitivity for LVH detection across all specificity levels.
• At 98% specificity, sensitivity increased from 10% to 17% in men and 12% to 22% in women.
• For severe LVH, sensitivity increased from 23% to 38% in men and 22% to 55% in women at 95% specificity.

Conclusions:

• The developed adjustment formula substantially enhances the utility of ECG for detecting left ventricular hypertrophy (LVH).
• This improved ECG criterion may be valuable for screening hypertensive populations and monitoring hypertension treatment.
• Further validation in diverse populations is recommended to confirm its clinical utility.