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Left ventricular hypertrophy and mortality--results from the Framingham Study
1Department of Medicine, Evans Memorial Research Foundation, Boston University School of Medicine, Mass.
Cardiology
|January 1, 1992
Summary
Left ventricular hypertrophy (LVH), detected by ECG, echocardiogram, or X-ray, strongly predicts lethal atherosclerotic disease and cardiovascular events. Reversing LVH offers benefits, especially when addressing associated risk factors like hypertension.
Area of Science:
- Cardiology
- Preventive Medicine
- Medical Imaging
Background:
- Left ventricular hypertrophy (LVH) is a significant cardiac condition.
- Its prognostic implications require thorough investigation across different detection methods.
- Long-term data is crucial for understanding LVH's impact on cardiovascular outcomes.
Purpose of the Study:
- To evaluate the prognostic significance of LVH using ECG, echocardiogram (ECHO), and X-ray.
- To assess the association between LVH and cardiovascular morbidity and mortality.
- To explore the reversibility of LVH and its impact on cardiovascular risk.
Main Methods:
- Analysis of 36-year follow-up data from the Framingham Study.
- Assessment of LVH using electrocardiogram (ECG), echocardiogram (ECHO), and X-ray.
- Statistical analysis of cardiovascular events, morbidity, and mortality in relation to LVH presence and severity.
Main Results:
- LVH, by any method (ECG, ECHO, X-ray), is a potent predictor of lethal atherosclerotic disease.
- Cardiovascular risk increases progressively with left ventricular muscle mass.
- ECG- and X-ray-determined LVH independently predict cardiovascular events, with combined presence indicating higher risk.
- Cardiac failure and stroke show the highest risk ratios with ECG-LVH, though coronary disease is the most common sequela.
- LVH is reversible, with anatomical LVH showing greater reversibility and benefit.
Conclusions:
- LVH is a critical indicator of advanced, lethal atherosclerotic disease.
- Reversal of LVH, particularly anatomical, improves cardiovascular outcomes.
- LVH risk is modulated by associated factors like hypertension, glucose intolerance, lipids, and smoking, highlighting the importance of risk factor modification.