Functional changes in left ventricular hypertrophy: diagnosis of impaired diastolic function in patients with hypertension.

Left ventricular hypertrophy is usually associated with impaired left ventricular diastolic function which can be characterised by an altered pressure volume relationship. Since diastolic flow velocities are closely related to the difference in pressure between the left atrium and left ventricle, parameters of diastolic function can be determined by Doppler echocardiography. However, the pressure difference is additionally influenced by factors which have no relation to left ventricular diastolic function. These include preload, afterload, inotropy, heart rate and left ventricular systolic function. Despite these limitations, Doppler echocardiography is a valuable tool to diagnose therapeutic effects on diastolic function in patients with left ventricular hypertrophy.