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Detection of hypertensive left ventricular hypertrophy
Hypertension (Dallas, Tex. : 1979)
|November 1, 1985
Summary
Electrocardiogram (ECG) tests often miss left ventricular hypertrophy (LVH) in hypertensive patients. Echocardiography is more sensitive for detecting LVH, crucial for guiding cardiovascular treatment decisions.
Area of Science:
- Cardiology
- Medical Diagnostics
Background:
- Left ventricular hypertrophy (LVH) increases cardiovascular event risk.
- Electrocardiography (ECG) is commonly used to screen for LVH.
- Treatment decisions for hypertension are influenced by LVH presence.
Purpose of the Study:
- To compare the accuracy of various ECG criteria for detecting LVH against echocardiography.
- To evaluate the effectiveness of ECG in identifying anatomical LVH in hypertensive patients.
Main Methods:
- Applied four sets of ECG criteria to 85 hypertensive patients.
- Used M-mode echocardiography with a left ventricular wall thickness ≥12 mm as the gold standard for LVH detection.
- Compared ECG results with echocardiographic findings.
Main Results:
- Echocardiography identified LVH in 40% (34/85) of hypertensive subjects.
- The most sensitive ECG criteria detected only 38% (13/34) of echocardiographically confirmed LVH cases.
- Significant underdiagnosis of LVH by ECG was observed.
Conclusions:
- Standard ECG criteria are insufficiently sensitive for detecting anatomical LVH in hypertensive individuals.
- Echocardiography offers superior sensitivity for LVH detection compared to ECG.
- Echocardiography is recommended for evaluating hypertensive patients, particularly those with normal ECGs, to accurately diagnose LVH.