Echocardiographic Studies in Patients, with Preexcitation Syndrome
The pioneering work of Edler in Sweden  and Eifert in Germany  has made echocardiography a widely used tool to detect structural and functional abnormalities of the human heart. The reflection of pulsed ultrasound waves is unique in its ability to record the motion of intracardiac structures noninvasively. High quality recordings of the contractile pattern of the left ventricular posterior wall, the motion of the interventricular septum and the mitral valve leaflets are examples for the great diagnostic value of echocardiography . Because in patients with Preexcitation Syndrome (PES) disturbed patterns of contraction of the heart have been reported in the literature [4, 5], we examined an unselected group of those patients with conventional echocardiographic methods.
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