Biomedical subjects
E Petcu
Publications and source records attributed to E Petcu.
Echocardiography in ischemic heart disease.
The kinetics and dimensions of the septum and left posterior ventricular wall as well as left ventricular performance were investigated by echocardiography in 50 patients with painful ischemic heart disease. In 10 cases hypokinesia and low left ventricular performance were found, more marked in those with a history of angina pectoris and myocardial infarction. The utility of this technique for exploring myocardial contractility and its limits is discussed.
[Left ventricular performance in sequelae of myocardial infarct without manifest ventricular insufficiency--evaluation by multiple non-invasive methods].
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[Current possibilities of echography in pneumological diagnosis (preliminary note)].
Various types of echographies are presented, and it is concluded that the bi-dimensional echography, also called type B or echo-tomography is the most useful for the study of pulmonary affections, and of compact formations in contact with the pulmonary tissues. With the aid of Model E.D.B. Unirad sonograph (Technicare, USA), and of the Scintron 5 computer (Scintag, Berthold, Switzerland) 6 patients with pleurisy of various extension, one patient with fibrothorax, and 2 patients with pulmonary tumours have been examined. Five of the cases are presented. Echotomography has demonstrated its usefulness in measuring the thickness of the thoracic wall, in establishing by means of a non-invasive technique the solid or fluid character of pleural affections, in assessing the structure of pachypleuritis and in detecting changes induced by tumours, or atelectasia in the vicinity of the pleura. However, the method does not provide information on round peripheral tumours which do not come into contact with the pleura. Also this method cannot replace other methods already used in the pneumological practice, but can provide supplementary informations without any risks for the patient.
Functional peculiarities of the heart in the aged.
The dynamics of the heart contraction was studied on 126 subjects of different age (3rd--8th decades), using the classical noninvasive method, and the electrocardiogram, the phonocardogram and the external carotid arterial pulse were simultaneously recorded. In a smaller number of cases there was recorded the apexcardiogram or the echogram of the mitral valve. There was ascertained a prolongation of the pre-ejection period (PEP) with advance in age, while the left ventricular ejection time (LVET) was not significantly modified. The LVET/PEP ratio decreased significantly with age. The isovolumic relaxation time, estimated by means of the apexcardiogram, was prolonged in the aged subjects. The echogram of the mitral valve showed a diminution of the E--F slope, demonstrating that the filling rate in the protodiastole decreases in the advanced age. This decrease may reflect a reduction with age in the rate of the opening movement of the mitral valve imposed by the inherent modifications either of the mitral valve or of the left ventricle. The delay of the protodiastolic filling of the ventricle can be attributed to the slowing down of the ventricle relaxation or to the increase of the left ventricle wall stiffness in the aged.
New possibilities in colour echotomography (computer-aided colour echotomography).
The present work discusses the technical bases and clinical significance of colour echography. Connecting the echograph to a high capacity computer through a Videotron permits the processing of colour images with the help of clinical programmes. This increases the accuracy of the diagnosis, and broadens the sphere of application of echography.