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Reevaluation of electrocardiographic criteria for left, right and combined cardiac ventricular hypertrophy
Insights
This study evaluated electrocardiographic criteria for diagnosing left ventricular (LV) and right ventricular (RV) hypertrophy in 323 men. Method 2, using specific ECG criteria, is recommended for LV hypertrophy diagnosis.
Area of Science:
- Cardiology
- Diagnostic Electrocardiography
Background:
- Ventricular hypertrophy is a significant cardiac condition.
- Accurate electrocardiographic (ECG) diagnosis of hypertrophy is crucial for patient management.
Purpose of the Study:
- To develop and evaluate electrocardiographic criteria for diagnosing left ventricular (LV) hypertrophy, right ventricular (RV) hypertrophy, and combined hypertrophy.
- To identify the most effective ECG methods for diagnosing these conditions.
Main Methods:
- Cardiac chamber weights were determined at necropsy in 323 men.
- Thirty criteria for LV hypertrophy and 10 for RV hypertrophy were evaluated.
- Four methods for LV hypertrophy and two methods for RV hypertrophy were derived and assessed.
Main Results:
- For LV hypertrophy, four methods were derived with sensitivities from 57-66% and specificities from 85-93%. Method 2 (specific ECG criteria) was preferred.
- For RV hypertrophy, two methods showed sensitivities from 18-43% and specificities from 83-95%.
- Combined hypertrophy was best diagnosed using left atrial abnormality plus RV hypertrophy criteria.
Conclusions:
- Specific electrocardiographic criteria can effectively diagnose ventricular hypertrophy.
- Method 2 is recommended for diagnosing LV hypertrophy.
- Established criteria provide valuable tools for identifying RV and combined hypertrophy.
Abstract:
Cardiac chamber weight was determined at necropsy in 323 men to develop correlative studies of electrocardiographic criteria for ventricular hypertrophy. Thirty recommended criteria for left ventricular (LV) hypertrophy, 10 for right ventricular (RV) hypertrophy, and combinations of both criteria for combined hypertrophy were evaluated. Four methods for electrocardiographic diagnosis of LV hypertrophy were derived: (1) a modification of the Romhilt-Estes point system; (2) the presence of any 1 of 3 criteria: (a) S V1 + R V5 or V6 greater than 35 mm, (b) left atrial abnormality, or (c) intrinsicoid deflection in lead V5 or V6 greater than or equal to 0.05 second; (3) a combination of any 2 criteria or of 1 criterion (above) plus at least 1 of the following 3 additional criteria: (a) left-axis deviation greater than -30 degrees, (b) QRS duration greater than 0.09 second, or (c) T-wave inversion in lead V6 of 1 mm or more; and (4) the use of a single criterion--left atrial abnormality. Sensitivity varied from 57 to 66% and specificity from 85 to 93% among these 4 methods. Myocardial infarction increased sensitivity of the foregoing methods, but the specificity was reduced. Method 2 is preferred for the electrocardiographic diagnosis of LV hypertrophy. Two methods were useful for right ventricular (RV) hypertrophy: (1) the use of any 1 of 4 criteria: (a) R/S ratio in lead V5 or V6 less than or equal to 1; (b) S V5 or V6 greater than or equal to 7 mm; (c) right-axis deviation of more than +90 degrees, or (d) P pulmonale; and (2) use of any 2 combinations of the foregoing criteria. Sensitivity ranged from 18 to 43% and specificity from 83 to 95%. Combined hypertrophy was best diagnosed using left atrial abnormality as the sole criteria of LV hypertrophy, plus any 1 of 3 criteria of RV hypertrophy: (a) R/S ratio in lead V5 or V6 less than or equal to 1, (b) S V5 or V6 greater than or equal to 7 mm, or (c) right axis deviation greater than +90 degrees.(ABSTRACT TRUNCATED AT 250 WORDS)