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Population implications of electrocardiographic left ventricular hypertrophy
W B Kannel1, A L Dannenberg, D Levy
1Evans Department of Clinical Research, University Hospital, Boston, Massachusetts 02118.
Insights
Electrocardiographic left ventricular (LV) hypertrophy signals increased risk for heart disease, stroke, and early death. This finding warrants proactive preventive strategies for better cardiovascular health outcomes.
Area of Science:
- Cardiology
- Clinical Electrocardiography
Background:
- Electrocardiographic left ventricular (LV) hypertrophy is a significant risk factor for cardiovascular disease.
- Its predictive power for adverse outcomes like coronary heart disease, cardiac failure, stroke, and peripheral arterial disease is substantial, even exceeding that of hypertension.
- The presence of repolarization abnormality further amplifies the risks associated with LV hypertrophy.
Purpose of the Study:
- To highlight the prognostic significance of electrocardiographic LV hypertrophy.
- To emphasize the need for vigorous preventive management in individuals with this finding.
- To compare the prognostic value of electrocardiographic LV hypertrophy with echocardiographic anatomical hypertrophy.
Main Methods:
- Analysis of electrocardiographic data to identify LV hypertrophy.
- Correlation of electrocardiographic findings with cardiovascular disease incidence and mortality.
- Comparison of prognosis between electrocardiographic LV hypertrophy and other cardiac conditions like silent myocardial infarction and x-ray determined cardiac enlargement.
Main Results:
- Electrocardiographic LV hypertrophy is a strong predictor of cardiovascular morbidity and mortality, including cardiac failure, coronary heart disease, stroke, and peripheral arterial disease.
- The risk conferred by LV hypertrophy is particularly elevated when repolarization abnormalities are present.
- Electrocardiographic LV hypertrophy shows a similar evolution and prognosis to silent myocardial infarction and is a stronger predictor of cardiac failure than x-ray cardiac enlargement.
Conclusions:
- Electrocardiographic LV hypertrophy is a critical, early indicator of serious cardiovascular disease and premature mortality, often preceding symptoms.
- Vigorous preventive measures are essential for individuals diagnosed with electrocardiographic LV hypertrophy.
- Further prospective research is required to compare the prognostic accuracy of electrocardiographic versus echocardiographic assessments of LV hypertrophy.
Abstract:
Left ventricular (LV) hypertrophy on the electrocardiogram is an ominous harbinger of cardiovascular disease in the general population markedly increasing the risk of coronary heart disease, cardiac failure, stroke and peripheral arterial disease. This contribution to risk exceeds that of the often accompanying hypertension. Once overt coronary disease occurs, electrocardiographic LV hypertrophy also further escalates risk of cardiovascular morbidity and mortality. The risk associated with electrocardiographic LV hypertrophy is particularly great when repolarization abnormality is present. Electrocardiographic LV hypertrophy and silent electrocardiographic myocardial infarction are similar in evolution and prognosis. LV hypertrophy is an important predictor of risk of cardiac failure; the electrocardiographic manifestation of LV hypertrophy predisposes to cardiac failure more than x-ray cardiac enlargement. Electrocardiographic LV hypertrophy heralds the onset of serious cardiovascular disease and premature mortality despite lack of associated symptoms. The serious prognosis of this abnormality warrants vigorous preventive management. More prospective data are needed comparing the prognosis of echocardiographic anatomical hypertrophy with that diagnosed by electrocardiography.