Questionable validity of left ventricular hypertrophy cutoff values in morbidly and super-morbidly obese patients

Area of Science:

• Cardiology
• Medical Diagnostics
• Obesity Research

Background:

• Diagnostic criteria for left ventricular hypertrophy (LVH) using electrocardiograms (ECG) are insufficient for obese patient populations.
• Existing ECG methods may not accurately reflect cardiac changes in individuals with significant obesity.

Purpose of the Study:

• To evaluate the effectiveness of current ECG diagnostic criteria for LVH.
• To validate previously proposed criteria in patients with morbid obesity.
• To identify reliable ECG markers for LVH in obese individuals.

Main Methods:

• A cohort of 429 morbidly obese patients (BMI ≥ 35 kg/m²) was studied.
• Patients' demographics included mean age of 38.6 years, mean BMI of 48.7 kg/m², with 323 females and 106 males.
• Diagnostic criteria assessed included RaVL, Cornell index, Cornell index × QRS duration, and Romhilt-Estes score.

Main Results:

• None of the evaluated standard voltage-based ECG criteria (RaVL ≥ 7.5 mm, Cornell index ≥ 12.5 mm, Cornell index × QRS duration ≥ 1125 mm·ms, Romhilt-Estes score ≥ 1) were appropriate for diagnosing LVH in this cohort.
• The study highlights a significant gap in current diagnostic capabilities for LVH in super-morbidly obese patients.

Conclusions:

• Existing ECG criteria for LVH are not suitable for diagnosing morbidly obese patients.
• Further research is necessary to develop and validate accurate ECG diagnostic tools for LVH in this specific population.