ABSTRACT
The study is performed to evaluate opportunities of the echotacho-cardiograph Ritm in detecting the velocify of ventricular wall motions by using the Doppler effect and the echocardioscope Ekran++ that provides display and photography of the heart in the B-mode. In combination with a focusing probe, Ritm is a portable, easy in operation model. When operating with a high frequency recorder it indicates the Doppler signals from different myocardium sites at all stages of the surgical intervention. With the model Ekran++ one can display the heart in real time during surgery as well as evaluate anatomic and dynamic interactions between various cardiac structures that is of great importance in making decisions on surgical tactics and methods.
Subject(s)
Cardiac Surgical Procedures/instrumentation , Echocardiography/instrumentation , HumansABSTRACT
A comparative study of the results of Doppler cardiovalvulography using standard (projector) and original focused ultrasound source is reported. Patients with mitral stenosis is reported. Patients with mitral stenosis and normal or elevated pulmonary pressure were investigated. The focused source was shown to yield unmodified information on the movement of the valves, whereas the projector source recorded the sum total of Doppler signals from the anterior and posterior walls as well as some intracardiac structures. The desired pure signal from the valve was not possible to isolate by either frequency selection, or any other techniques. Valvular movement patterns were shown for cases of pulmonary hypertension that were undetectable by the projector source. The focused source of ultrasound can be used to detect the moments of valvular opening and closing in the absence of sound equivalents.
