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Biomedical subjects

T First

Publications and source records attributed to T First.

28 records · Page 2Linked to original sources
PubMed1985

Results of corrective surgery for tetralogy of Fallot.

During a 5-year period (1978-1983) corrective surgery for tetralogy of Fallot was performed in 114 patients, ranging in age from 2 to 24 years (mean 8.4 years). Forty-one of them (35.9%) had previously undergone a palliative operation. Insertion of a transannular patch was necessary in 48 patients (42.1%). Eleven children died in the immediate postoperative period (early mortality 9.6%); no deaths occurred later. 103 survivors were followed-up for periods ranging from 5 months to 5 years mean 2.4 years) after surgery. The condition in 91 patients was excellent (88.7%), in 11 good (10.7%) and in one poor. Residual ventricular septal defect persisted in 9 patients (8.7%). Postoperative ECG revealed complete right bundle branch block in 71 patients (59%), incomplete block in 18 (18%), 5 patients (5%) had complete RBBB with left anterior hemiblock. Postoperative dysrhythmia requiring treatment was found in 7 patients (6%). Of 82 patients thoroughly examined by echocardiography, 37 (45%) had pulmonary regurgitation, 29 (35%) pulmonary plus tricuspid regurgitation, and 3 (4%) isolated tricuspid regurgitation. 83% of the patients had impaired lung function.

Adolescent↗
PubMed1981

Contribution of pulsed Doppler echocardiography to ultrasound diagnosis of congenital heart diseases.

The authors document the importance of echocardiograhy (ECHO) with special respect to the pulsed Doppler technique (PDE) in the diagnosis of congenital heart diseases. Typical ECHO and PDE findings in atrial and ventricular septal defects, patent ductus arteriosus, valvular stenosis and insufficiency, absence of pulmonary valves, tricuspid and pulmonary atresia, Fallot's tetralogy, arterial trunk, double-outlet right ventricle, transposition of the great arteries, total anomalous pulmonary venous drainage and hypoplastic left-heart syndrome are described. The authors conclude that a combination of M-mode, cross-sectional and pulsed Doppler echocardiography permits a comparatively detailed non-invasive diagnosis of the entire spectrum of congenital heart diseases.

Aortic Valve Stenosis↗
PubMed1976

Structural and enzymatic properties of cardiac myosin in ischaemic and non-ischaemic regions of the rat myocardium.

In rats with ligation of the left coronary artery changes in ATPase activity and structure of cardiac myosin in both ischaemic and non-ischaemic zones of the myocardium were followed. In control animals, ATPase activity and the structure of the myosin molecule in right and left ventricles did not differ. Non-specific factors, such as anaesthesia and thoracotomy, can result in a decrease or an increase in ATPase activity respectively. One hour after ligation of the left coronary artery ATPase activity increased in the right, non-ischaemic myocardium and there was a significant right-to-left difference. Four hours after ligation, ATPase activity in both ventricles significantly decreased and the right-left difference disappeared. Within 48 h, normal values were found only in the non-ischaemic right ventricle. Ligation of the left coronary artery results after 48 h in the formation of structural alterations in cardiac myosin, primarily in the left, ischaemic myocardium. These changes are characterised by the formation of myosin aggregates, which have a significantly lower ATPase activity in comparison with monomeric myosin.

Adenosine Triphosphatases↗