PubMed Health⌕ Search

Biomedical subjects

M Hallberg

Publications and source records attributed to M Hallberg.

11 recordsLinked to original sources
PubMed1992

Flowmetric evaluation of internal mammary artery flap during repair of aortic coarctation.

Resection of the internal shelf through a longitudinal aortotomy and widening with the free end of the left in situ internal mammary artery (IMA) were steps in correction of aortic coarctation with isthmus hypoplasia in nine patients aged 9-14 (mean 10.5) years. Electromagnetic flowmetry was performed on the left IMA before and after the repair. The essential finding was considerably increased mean blood flow in the IMA flap during cross-clamping proximal to the completed repair, from 53 +/- 48 to 430 +/- 74 ml/min (378 +/- 78%). The IMA thus is a powerful conduit with extraordinary flow capacity when runoff is appropriate. Integration of IMA as a viable flap in the repair of aortic coarctation implies that this artery increases its collateral flow contribution to the distal aorta.

Adolescent↗
PubMed1991

Estimation of Doppler gradients at rest and during exercise in patients with recoarctation of the aorta.

In patients with suspected recoarctation of the aorta the estimation of the pressure difference between the arms and legs is an important part of the examination. Because this difference is often augmented when the circulation is stressed by exercise, exercise tests are a useful part of the evaluation. Doppler echocardiography was used to estimate this pressure difference in 16 adult patients in whom simultaneous pressure and Doppler recordings were made both at rest and during exercise. There was a close correlation between the invasive peak instantaneous gradient and the Doppler gradient both at rest and during exercise. There was only a moderate correlation between the invasive peak to peak gradient and the Doppler gradient at rest and during exercise. Doppler echocardiography is recommended as an easy and accurate method of estimating the peak instantaneous gradient both at rest and during exercise in patients with suspected recoarctation.

Adult↗
PubMed1989

The internal mammary artery free and flap aortoplasty in coarctation of the aorta.

A technique for correction of aortic coarctation is described in which the left internal mammary artery (IMA) is distally divided for integration in the repair. After resection of the internal coarctation ridge, the distal end of the freed IMA is obliquely severed, opened to required length and thus fashioned as a widening flap suitable fro aortoplasty. IMA free end flap aortoplasty gave promising early results in seven patients aged 10-15 years with aortic coarctation and IMA of good quality and calibre.

Adolescent↗
PubMed1989

The internal mammary artery origin flap aortoplasty in coarctation of the aorta.

The left internal mammary artery (IMA) was divided proximally to form an integral part of the repair in coarctation. After resection of the internal coarctation ridge, the origin of the IMA was obliquely divided, opened to required length and thus fashioned as a widening flap for aortoplasty. This procedure preserves distal continuity of the IMA with direct blood supply to the breast. The 'origin flap' aortoplasty gave promising early results in six patients and 10-17 years with aortic coarctation and IMA of suitable calibre and good quality.

Adolescent↗
PubMed1989

Neonatal endocarditis requiring surgery.

A case of infective endocarditis in a neonate is reported. Echocardiography demonstrated a large (1 X 1.5 cm) vegetation on the anterior mitral leaflet protruding into the ventricle during diastole. The left atrium was enlarged and Doppler showed mitral regurgitation. Excision of the vegetation during effective antibiotic treatment involved no complications. Although histologically the endocarditis was in the early stage of healing, surgical removal of large, floppy vegetations is advocated because of the unpredictable risk of catastrophic embolization.

Anti-Bacterial Agents↗
PubMedDate not supplied

Magnetic resonance imaging and angiography for the assessment of coarctation of the aorta.

Fifteen patients ranging in age from 9 to 25 years (median age 10 years), with coarctation of the aorta, were investigated with magnetic resonance (MR) imaging pre- and postoperatively. Three patients were examined because of suggested re-stenosis. Both MR examination and cineangiography were performed in 11 patients. The two techniques were comparable concerning the evaluation of both the site and the severity of coarctation as well as of the occurrence of collateral vessels. MR was considered suitable to replace angiography in the pre- and postoperative assessment of coarctation. The patients were preferably examined with a surface spine coil with ECG-gated sagittal, transverse and parafrontal images. The parafrontal images were necessary in order to minimize mistakes due to partial volume effects at the coarctation site. A surface coil placed over the sternum considerably improved the visualization of the internal mammary arteries.

Adolescent↗