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Biomedical subjects

B Fiser

Publications and source records attributed to B Fiser.

At least 55 records · Page 3Linked to original sources
PubMed1982

Unilateral absence of pulmonary artery: a report on 19 selected clinical cases.

Nineteen cases of unilateral absence of the pulmonary artery (UAPA) were found in a group of 2,960 patients investigated consecutively by cardiac catheterization, angiocardiography, and pulmonary perfusion scintigraphy. The incidence of UAPA was 0,6%. In 8 cases (40%) UAPA was found in isolation, and in 11 cases (60%) it was combined with other congenital heart defects (CHD). In 30% of our patients the diagnosis of UAPA was suggested by clinical symptoms and plain chest X-ray. Pulmonary perfusion scan was made in 2,600 children before catheterization. Though it can provide strong evidence of the diagnosis, this should be confirmed by cardiac catheterization and selective angiography. Eight patients were operated upon. Systemic-pulmonary shunt operations were performed in 6, and ligation of PDA in 2 patients. In one of the latter severe hemoptysis occurred following ligation of the PDA. The pathophysiological and diagnostic aspects of UAPA are discussed.

Adolescent↗
PubMed1982

Relaxation of the myocardium of the perfused and ischaemic rabbit heart.

The decrease in the rate of relaxation of the myocardium during ischaemic impairment of metabolic processes is accompanied by a decrease in the size of contraction. If we stimulate the ischaemic heart with irregularly distributed pulses we can achieve, by an extrasystolic potentiation mechanism, isolated contractions. If we stimulate the ischaemic heart with irregularly distributed pulses we can achieve, by an extrasystolic potentiation mechanism, isolated contractions of the same size as average contractions in normal perfusion. When comparing the relaxation of such contractions in 15 perfused rabbit hearts, we found a linear correlation between the relaxation rate and the size of the contractions. If we relate to relaxation rate to contraction size, the relaxation rate in early ischaemia (1 min after stopping perfusion) is thus in most cases normal, despite the marked decrease in the size of the contractions. The size of the contractions of the ischaemic mammalian myocardium thus seems to diminish before relaxation (which is likewise energy-dependent) is affected.

Animals↗
PubMed1981

[Anomalous left coronary artery originating from the pulmonary artery in infants].

The authors report on examples of surgical treatment of the left coronary artery originating from the pulmonary artery with myocardial infarction to be found in 4 infants and one suckling at the age of 2, 3, 6, 8, and 30 months. The anomalous origin of the left coronary artery from the pulmonary artery was double ligated. All children survived the operation and two years after the operation they were in good health and without complaints. Electrocardiographic signs of anterolateral ischaemia of the myocardium have decreased.

Child, Preschool↗