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Stenting of Lesions in Patent Ductus Arteriosus with Duct-Dependent Pulmonary Blood Flow: Focus on Case Selection, Techniques and Outcome

Alwi M, Mood MC

Interv Cardiol Clin, 2013 Jan;2(1):93-113.
PMID: 28581990 DOI: 10.1016/j.iccl.2012.09.011

Stenting of patent ductus arteriosus (PDA) is an attractive alternative to the surgical aortopulmonary shunt in the palliation of cyanotic congenital heart disease. However, the diverse morphology of PDA in this setting limits its role, as stenting an overly tortuous duct may not be feasible, and in a significant number of patients, ductus-related pulmonary artery stenosis contraindicates this procedure. The major acute complications are stent migration, thrombosis, and cardiac failure. Early failure of palliation caused by in-stent stenosis is another limitation of this procedure.

Study site: Institut Jantung Negara (IJN), Kuala Lumpur, Malaysia
Pulmonary atresia with intact septum: the use of Conquest Pro coronary guidewire for perforation of atretic valve and subsequent interventions

Alwi M, Budi RR, Mood MC, Leong MC, Samion H

Cardiol Young, 2013 Apr;23(2):197-202.
PMID: 22640635 DOI: 10.1017/S1047951112000595

Objective: To determine the feasibility and safety of the Conquest Pro wire as an alternative to radiofrequency wire for perforation of atretic pulmonary valve and subsequent balloon dilatation and patent ductus arteriosus stenting in patients with pulmonary atresia with intact ventricular septum.
Background: Radiofrequency valvotomy and balloon dilatation has become the standard of care for pulmonary atresia with intact ventricular septum in many institutions today.
Methods: We report eight consecutive patients in whom we used the Conquest Pro coronary guidewire, a stiff wire normally reserved for revascularisation of coronary lesions with chronic total occlusion, for perforation of atretic pulmonary valve and subsequent balloon dilatation, and stenting of the patent ductus arteriosus.
Results: Perforation of atretic pulmonary valve was successful in seven out of eight cases. Radiofrequency valvotomy was employed after failure of perforation by the Conquest Pro wire in one case where the right ventricular outflow tract was broad based and tapered towards the pulmonary valve, and was heavily trabeculated. Failure of the Conquest Pro wire to perforate the pulmonary valve plate was mainly attributed by the failure to engage the wire at the correct position.
Conclusion: The Conquest Pro wire for perforation and subsequent interventions in the more straightforward cases of pulmonary atresia with intact ventricular septum is effective and safe, simplifying the entire procedure. However, the radiofrequency generator and wires remain essential tools in the paediatric interventional catheter laboratory.
Corrigendum to 'Impact of ductal stenting on pulmonary artery reconstruction in patients with duct-dependent congenital heart diseases-an institutional experience' [Interact CardioVasc Thorac Surg 2020;31:221-7.]

Haranal M, Mood MC, Leong MC, Febrianti Z, Latiff HA, Samion H, et al.

Interact Cardiovasc Thorac Surg, 2020 08 01;31(2):285.
PMID: 32706029 DOI: 10.1093/icvts/ivaa152
Impact of ductal stenting on pulmonary artery reconstruction in patients with duct-dependent congenital heart diseases-an institutional experience

Haranal M, Mood MC, Leong MC, Febrianti Z, Abdul Latiff H, Samion H, et al.

Interact Cardiovasc Thorac Surg, 2020 08 01;31(2):221-227.
PMID: 32437520 DOI: 10.1093/icvts/ivaa069

OBJECTIVES: This study aims to review our institutional experience of ductal stenting (DS) on the growth of pulmonary arteries (PAs) and surgical outcomes of PA reconstruction in this subset of patients.
METHODS: This is a retrospective study done in neonates and infants up to 3 months of age with duct-dependent pulmonary circulation who underwent DS from January 2014 to December 2015. Post-stenting PA growth, surgical outcomes of PA reconstruction, post-surgical re-interventions, morbidity and mortality were analysed.
RESULTS: During the study period, 46 patients underwent successful DS, of whom 38 underwent presurgery catheterization and definite surgery. There was significant growth of PAs in these patients. Biventricular repair was done in 31 patients while 7 had univentricular palliation. Left PA augmentation was required in 13 patients, and 10 required central PA augmentation during surgery. The mean follow-up period post-surgery was 4.5 ± 1.5 years. No significant postoperative complications were seen. No early or follow-up post-surgery mortality was seen. Four patients required re-interventions in the form of left PA stenting based on the echocardiography or computed tomography evidence of significant stenosis.
CONCLUSIONS: DS provides good short-term palliation and the growth of PAs. However, a significant number of stented patients require reparative procedure on PAs at the time of surgical intervention. Acquired changes in the PAs following DS may be the reason for reintervention following PA reconstruction.
Pilot phase experience of the International Quality Improvement Collaborative catheterization registry

Barry OM, Ali F, Ronderos M, Sudhaker A, Kumar RK, Mood MC, et al.

Catheter Cardiovasc Interv, 2021 01 01;97(1):127-134.
PMID: 32294315 DOI: 10.1002/ccd.28908

OBJECTIVES: To describe the development of a quality collaborative for congenital cardiac catheterization centers in low and middle-income countries (LMICs) including pilot study data and a novel procedural efficacy measure.
BACKGROUND: Absence of congenital cardiac catheterization registries in LMICs led to the development of the International Quality Improvement Collaborative Congenital Heart Disease Catheterization Registry (IQIC-CHDCR). As a foundation for this initiative, the IQIC is a collaboration of pediatric cardiac surgical programs from LMICs. Participation in IQIC has been associated with improved patient outcomes.
METHODS: A web-based registry was designed through a collaborative process. A pilot study was conducted from October through December 2017 at seven existing IQIC sites. Demographic, hemodynamic, and adverse event data were obtained and a novel tool to assess procedural efficacy was applied to five specific procedures. Procedural efficacy was categorized using ideal, adequate, and inadequate.
RESULTS: A total of 429 cases were entered. Twenty-five adverse events were reported. The five procedures for which procedural efficacy was measured represented 48% of cases (n = 208) and 71% had complete data for analysis (n = 146). Procedure efficacy was ideal most frequently in patent ductus arteriosus (95%) and atrial septal defect (90%) device closure, and inadequate most frequently in coarctation procedures (100%), and aortic and pulmonary valvuloplasties (50%).
CONCLUSIONS: The IQIC-CHDCR has designed a feasible collaborative to capture catheterization data in LMICs. The novel tool for procedural efficacy will provide valuable means to identify areas for quality improvement. This pilot study and lessons learned culminated in the full launch of the IQIC-CHDCR.