Biomedical subjects

L M Bargeron

Publications and source records attributed to L M Bargeron.

At least 91 records · Page 5Linked to original sources

PubMed1976

Intracardiac repair of cardiac malformations with atrioventricular discordance.

Twenty-six patients with atrioventricular discordance and a variety of ventriculo-arterial connections have had appropriate intracardiac repairs. Seven of 26 patients (26.9%) died early postoperatively, but only two (11.1%) of 18 patients operated upon since May 1972 have died. Ten patients (40%) developed permanent complete heart block. Two patients died late postoperatively; 16 (84.1% of those surviving the early postoperative period) were in NYHA Class I or II at late follow-up. Seventeen of the patients had "corrected transposition." Six developed tricuspid incompetence with regurgitation into the left atrium after repair. Two patients with atrioventricular discordance and double outlet right ventricle survived operation and are asymptomatic but have permanent pacemakers. One patient died after repair of double outlet left ventricle with atrioventricular discordance. Three of four patients with atrioventricular discordance and "pseudotruncus arteriosus" survived repair with valved external conduits and are well. One of two patients is well after repair of "isolated ventricular inversion" and ventricular septal defect.

Adolescent↗

PubMed1976

Surgical treatment of truncus arteriosus, with emphasis on infants and small children.

Two of 10 children with truncus arteriosus, Type I, II, less than 2 years of age, 6 of 7 between 2 and 5 years of age, and all 5 older than 5 years survived after complete repair. Five of the nine hospital deaths are believed related to inadequate intra- and postoperative management. One late death has occurred 42 months postoperatively. The low hospital mortality rates in those 2 years of age and older, good long-term results to date, and the poor prognosis of children not operated upon indicate the advisability of elective repair at age 2 to 3 years. Although results in infants less than 2 years old have not been good, current improvements of intra- and postoperative care and the lack of a better alternative suggest that prompt primary repair is indicated for infants with intractable heart failure or increasing pulmonary vascular resistance.

Age Factors↗

PubMed1975

Electrophysiological delineation of the specialized A-V conduction system in patients with corrected transposition of the great vessels and ventricular septal defect.

The specialized atrioventricular (A-V) conduction system was electrophysiologically delineated during open-heart surgery in four patients with congenitally corrected transposition of the great vessels and associated ventricular septal defect and one patient with single ventricle. Two consistent observations were made: 1) In no case was the specialized A-V conduction system found in the right atrium, whether or not there was a coronary sinus ostium present. 2) Specialized A-V conduction system electrograms were never delineated posterior to the ventricular septal defect, in contradistinction to this usual location in hearts having ventricular septal defects associated with other congenital lesions. In three of five patients, the initial course of the A-V conduction system of the ventricles was delineated between the anterior aspect of the ventricular septal defect and the pulmonary artery. In one patient the proximal portion of the A-V conduction system was delineated on the anterior aspect of the pulmonary conus. The course and extent of the A-V conduction system delineated in the morphological left ventricle suggests it is a left bundle branch. The surgical implications of the ectopic location of the A-V conduction system anterior to the ventricular septal defect, and the variability of the more proximal portion of the A-V conduction system are discussed.

Adult↗

PubMed1974