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Biomedical subjects

O Visioli

Publications and source records attributed to O Visioli.

At least 217 records · Page 12Linked to original sources
PubMed1975

[The influence of pre-load on myocardial contractility indices. Experimental research (author's transl)].

The behaviour by increasing the ventricular volume of several parameters and indices proposed for measuring the cardiac contractility has been determined in isolated guinea pig hearts beating under isometric conditions. Particularly, V max calculated on the total pressure has been compared with the Vmax calculated on the developed pressure. Whilst the later showed to be independent of preload changes, Vmax was calculated on the total pressure, decreased by changing the ventricular volume. Moreover, it showed itself to be independent of pre-load changes. An index proposed recently obtained from the plot (P, P'), as ratio between the positive portion of the area and the developed sistolic pressure wals also demonstrated.

Animals↗
PubMed1975

[Isolated tricuspid insufficiency of traumatic type. Report of a case and revision of the literature (author's transl)].

A case of isolated tricuspid insufficiency is reported. The lesion, that at surgery resulted to be an anterior valve leaflet detachment, was well tolerated for a long time. After 23 years from the trauma the patient was successfully treated by surgical correction. The clinical features, compared to the 33 cases reported in the literature, demonstrated that the clinical course was more dramatic in patients with papillary muscle rupture than in those where the lesion was located on the chordae tendineae and/or the valves. The physical findings are characteristic but not specific of the traumatic type of tricuspidal insufficiency. However, when these symptoms are found in a patient where a trauma has previously occurred, the correct diagnosis should consider this possibility. The ECG usually shows incomplete bundle branch block, and the chest roentgenogram reveals cardiomegaly. Furthermore, the blood pressure levels in the right chambers are nearly normal. Surgery is often indicated and seems to give very good results. Our patient markedly improved after surgical treatment. Electrocardiographic and vectorcardiographic evidence of right atrial and ventricular hypertrophy was reduced as well as the roentgenographic pattern.

Adult↗