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  4. Balloon Angioplasty for Obstructed Modified Systemic-Pulmonary Artery Shunts and Pulmonary Artery Stenoses
 
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Balloon Angioplasty for Obstructed Modified Systemic-Pulmonary Artery Shunts and Pulmonary Artery Stenoses

Resource
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY v.37 n.3 pp.940-947
Journal
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY
Journal Volume
v.37
Journal Issue
n.3
Pages
940-947
Date Issued
2001
Date
2001
Author(s)
WANG, JOU-KOU
WU, MEI-HWAN
CHANG, CHUNG -I
CHIU, ING-SH
LUE, HUNG-CHI
URI
http://ntur.lib.ntu.edu.tw//handle/246246/94816
Abstract
OBJECTIVES The results of Percutaneous balloon angioplasty for obstructed modified Blalock-Taussig (BT) or central shunts and pulmonary artery (PA) stenoses were studied to assess its role as an alternative to second shunt and surgical PA angioplasty.BACKGROUND Obstruction of a modified shunt and PA stenosis related to the shunt or ductus are not infrequent. A second shunt with or without PA angioplasty is required if the PA size, morphology or age of the patient is suboptimal for definitive surgery. METHODS From June 1994 to May 1999, balloon angioplasty for obstructed systemic to-PA shunts nas performed in 46 patients, with ages ranging from 1 month to 7.4 years (2.2 + /- 1.9 years). Among the 46 patients, 32 had modified BT shunts, 5 had bilateral shunts, 7 had modified central shunts, and 2 had both modified BT and central shunts. Stenoses were seen in 27 main branch PAs, and interruption was present in three. A concurrent balloon angioplasty was attempted in 28 main branch PAs, but it was performed in only 25 vessels.RESULTS Balloon dilation for obstructed modified shunts was considered to be effective in 42 patients (91%), while angioplasty for PA stenosis was effective in 14 vessels and not effective in 11 vessels. After balloon dilation angioplasty, oxygen saturation in the aorta increased from 74.4 +/- 4.3% to 80.8 +/- 3.6% (p < 0. 01) in these 46 patients. One patient died of pneumonia. Eight patients required an additional modified BT shunt soon after the procedure because of severe stenosis or interruption at main branch PA. After a mean follow-up period of 11.6 +/- 5.4 months, 29 patients underwent a repeated imaging study to evaluate the morphology and size of the PAs. Of these 29 patients, 26 underwent open heart surgery, with two mortalities.CONCLUSIONS When a second shunt is under consideration because of obstruction of the modified shunt, balloon angioplasty is a possible alternative procedure. Pulmonary artery stenosis, if present , can be simultaneously dilated, (J Am Coil Cardiol 2001;37: 940-7) (C) 2001 by the American College of Cardiology.
Subjects
BLALOCK-TAUSSIG SHUNTS
CONGENITAL HEART-DISEASE
DILATION ANGIOPLASTY
INFANTS
COARCTATION
ANASTOMOSIS
Type
journal article

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