Search PubMed⌕ Search

Biomedical subjects

R Razzolini

Publications and source records attributed to R Razzolini.

At least 91 records · Page 5Linked to original sources
PubMed1979

[Ischemic alterations of the regional mechanical performance of the left ventricle. Study of parietal deformation as a vectorial time-dependent parameter and of pressure-length loops (author's transl)].

A study was carried out on 59 patients with significant stenosis (greater than or equal to 75%) in at least one coronary vessel. For each parietal region of the left ventricle the pattern of contraction was defined through a study of the regional deformation as vectorial time-dependent parameter and of the construction of the pressure-length loops. The different models obtained in basal conditions and through intervention (nitroglycerin and post-extrasystolic potentiation) were correlated with experimental data on ischemic alterations of the regional mechanical performance.

Cineradiography↗
PubMed1979

[Aortic insufficiency associated with interventricular communication. Natural history, angiographic diagnosis and surgical approach].

Clinical, electrocardiographic, radiological, hemodynamic and angiocardiographic data of 12 patients with ventricular septal defect (VSD) associated to aortic regurgitation (AR) have been analyzed. The trend of evolution of the AR has been evaluated and angiographic criteria to make a correct diagnosis have been pointed out. Nine patients have been followed up for a mean of 3.8 years. The severity of AR seemed to increase only in three cases: this demonstrates that AR associated to VSD is not always a progressive disease. The usefulness of various radiological views in evidencing the anatomy of both VSD and aortic valve has been discussed and findings of left ventriculogram and aortogram are detailedly described. The site of VSD and the type of lesion of the aortic valve may be crucial for indicating surgical intervention and its type. Indication for surgery is briefly discussed. Surgical technics are shortly summarized.

Adolescent↗
PubMed1978

[Anomalous muscle band of the right ventricle. Part II: Report of six cases associated to other cardiac congenital malformations (author's transl)].

Six cases of anomalous muscle band of the right ventricle associated to other cardiac congenital malformations are described. In five of them ventricular septum defect was present; in one aortic valvular stenosis with supravalvular diaphragm, plus right pulmonary artery stenosis. Modification in pathophysiology of ventricular septum defect due to the obstacle represents by the anomalous muscle band in the right ventricle are discussed in detail. In every case corrected diagnosis was suggested by right ventricle angiography.

Abnormalities, Multiple↗
PubMed1978

[Clinical and angiographic observations in aneurysm of the membranous septum. Pathologenetic implications].

Aneurysm-like kialations of the membranous septum are described with increasing frequency in association to a ventricular septal defect (VSD). Their etiology may be congenital, though with different pathogenesis and acquired. An anatomical distinction between true aneurysm of the membranous septum and pseudoaneurysm is proposed. The acquired forms may be joined to a decrease of left to right shunt and are regarded as the mechanism of closure of a VSD. Nine cases of aneurysm-like dilation of the membranous septum are presented: an interpretation of their etiology and pathogenesis is discussed, on the basis of the history and clinical and instrumental data.

Adolescent↗
PubMed1978

[Correlations between studies with plain radiography and with cineventriculography in subjects with prior myocardial infarct].

In 86 subjects wiht healed myocardial infarction the reliability of cardiothoracic ratio (C/T), of the left half-diameter (EDTS/m2) and of the overall subjective evaluation of a standard chest X-Ray plate has been tested by comparison to quantitative data drawn by selective cineventriculography. C/T and EDTS/m2 are scarcely reliable, whereas subjective evaluation allowed a separation among different groups of patients, though with wide overlap. Right anterior oblique and lateral views, and the evaluation of the third aortic arch were more useful than left anterior oblique and lowered apex.

Adult↗
PubMed1977

[Isolated mitral stenosis: systolic and diastolic dynamic geometry of the left ventricle. Integration with several hemodynamic parametres (author's transl)].

75 patients with isolated mitral stenosis were studied. Particular attention was paid to the integration of the parametres VTD, FE, mitral area, pulmonary artery pressure and dynamic systolic and diastolic geometry of the left ventricle. The existence of isolated MS with alteration of the left ventricular function not depending on the alterations of the preload and the forms with raised FE, was demonstrated. A classification into 6 groups was made, each characterized by special geometric modalities of contraction and relaxation. A significant compensation of several of the parametres of systolic mecanism (hyperkinesia) and diastolic (SERP) dynamic geometry was observed. It was therefore concluded that a more precise definition of the interaction of ventricular function with left atrial function is necessary.

Cardiomegaly↗