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Biomedical subjects

A Bisteni

Publications and source records attributed to A Bisteni.

45 records · Page 3Linked to original sources
PubMedDate not supplied

[Electrocardiography of high frequency and pneumopathies].

High frequency electrocardiograms were studied in 19 patients with chronic neumopathies, pulmonary arterial hypertension and respiratory failure in the great majority. Studies were made of: a) the significance of conduction disorders in the right ventricle either at the fasciculary branch or within the mass of the ventricle with regard to the time of appearance and the length of the intrinsicoid deflection and its components. b) The duration of the electrical sistole of each ventricle in relation with hyperatrophy that results in sistolic over loading. c) An attempt was made to correlate the number of high frequency deflections (discontinuity of activity) with the prognosis.

Adult↗
PubMedDate not supplied

[Electrocardiographic diagnosis in atrioventricular discordance].

The ECG of 37 patients with atrioventricular discordance were studied and divided in two main groups: I) Situs solitus and II) situs inversus, either a) without associated defects or b) with associated defects. It was concluded: 1) The first vector of ventricular activation, oriented in the same sense of that of atrial activation is a fundamental diagnostic sign; 2) The preponderance of anatomical right ventricle, leads to the diagnosis of unassociated defects; 3) The recognition of biventricular hypertrophy obliges to the diagnosis of associated defects; 4) The AQRS deviation and the shortening in duration of the local electrical systole help to recognized the hypertrofied ventricle and its overload; 5) The presence of right bundle branch block is not in relation to the degree of overloading; 6) The primary alterations of ventricular repolarization are univocal signs of myocardial damage.

Adolescent↗
PubMedDate not supplied

[Exercise tests in pneumopathy patients].

In this prospective work eleven pneumopathes patients were studied, ten of them with HAP, which were subjected to effort prove in endless band, in order to know the electrocardiographic alterations presented during the exercise. The VO2 máx was determined simultaneously in four patients. In the four, the value of this parameter was found under the normal value, which showed us a poor increase of the cardiac expense for the demands in the exercise. If the effort proves had not been practiced, this fact could not have been known. Related to the electrocardiographic alterations, cellular diastolic depolarization signs (cellular damage), product of the cellular damage, were found. The mechanics of this cellular damage, as well as the one of the poor increase of cardiac expense, are mentionned in the discussion.

Adolescent↗
PubMedDate not supplied

[The process of ventricular repolarization. I. Experimental study].

The sequence of ventricular repolarization process is studied in 25 dogs, using unipolar epicardial leads and some distant bipolar leads. It is concluded: 1. The sequence of ventricular repolarization process is from the base to the apex of the heart. 2. Its sense is independent from the activation process. 3. It is demonstrated the nature of the intrinsec deflection of the repolarization process. 4. The duration of the electrical systole is greater in the myocardial fibers of the right ventricle than in the fibers of the left ventricle. 5. The duration of the electrical systole is constant in the myocardial fibers of a blocked ventricle, but is delayed in the same proportion of the activation process. 6. The significance of the biphasic T wave is discussed, in the presence of bundle branch block. 7. Some bases are withdrown for the deductive interpretation of the T wave based upon the ventricular repolarization process.

Animals↗