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Ventricular hypertrophy (VH) is thickening of the walls of a ventricle (lower chamber) of the heart. [1] [better source needed] Although left ventricular hypertrophy (LVH) is more common, right ventricular hypertrophy (RVH), as well as concurrent hypertrophy of both ventricles can also occur.
Nonetheless, the ECG is used to assist with the diagnosis of RVH. A post mortem study on 51 adult male patients concluded that anatomical RVH may be diagnosed using one or more of the following ECG criteria: [8] Right axis deviation of more than (or equal to) 110° (see hexaxial reference figure) R-wave dominant over S-wave in V1 or V2
Left ventricular hypertrophy with secondary repolarization abnormalities as seen on ECG Histopathology of (a) normal myocardium and (b) myocardial hypertrophy. Scale bar indicates 50 μm. Gross pathology of left ventricular hypertrophy. Left ventricle is at right in image, serially sectioned from apex to near base.
The pathophysiology of pulmonary heart disease (cor pulmonale) has always indicated that an increase in right ventricular afterload causes RV failure (pulmonary vasoconstriction, anatomic disruption/pulmonary vascular bed and increased blood viscosity are usually involved [1]), however most of the time, the right ventricle adjusts to an overload in chronic pressure.
Left ventricular hypertrophy (LVH) – Hypertrophy of the left ventricle is more common than in the right and typically due to increased afterload on the heart such as from hypertension and aortic stenosis, but also from long standing mitral valve regurgitation. It can be diagnosed by echocardiography or ECG.
Regarding differential diagnosis, left ventricular hypertrophy is usually indistinguishable from athlete's heart and at ECG, but can usually be discounted in the young and fit. [ 15 ] [ 16 ] It is important to distinguish between athlete's heart and hypertrophic cardiomyopathy (HCM), a serious cardiovascular disease characterized by thickening ...
In electrocardiography, a strain pattern is a well-recognized marker for the presence of anatomic left ventricular hypertrophy (LVH) in the form of ST depression and T wave inversion on a resting ECG. [1] It is an abnormality of repolarization and it has been associated with an adverse prognosis in a variety heart disease patients.
Nonetheless, the ECG is used to assist with the diagnosis of RVH. A post mortem study on 51 adult male patients concluded that anatomical RVH may be diagnosed using one or more of the following ECG criteria: [10] Right axis deviation of more than (or equal to) 110° (see hexaxial reference figure) R-wave dominant over S-wave in V1 or V2