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Displaying publications 41 - 49 of 49 in total

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Initial Clinical Trial of A Novel Pulmonary Valved Conduit

Prodan Z, Mroczek T, Sivalingam S, Bennink G, Asch FM, Cox M, et al.

Semin Thorac Cardiovasc Surg, 2021 May 10.
PMID: 33984478 DOI: 10.1053/j.semtcvs.2021.03.036

Valved allografts and xenografts for reconstruction of the right ventricular outflow tract (RVOT) lack durability and do not grow. We report the first clinical use of a completely bioabsorbable valved conduit (Xeltis pulmonary valve - XPV) in children. Twelve children (six male), median age five (two to twelve) years and median weight 17 (10 to 43) kg, underwent RVOT reconstruction with the XPV. Diagnoses were: pulmonary atresia with ventricular septal defect (VSD) (n=4), tetralogy of Fallot (n=4), common arterial trunk (n=3), and transposition of the great arteries with VSD and pulmonary stenosis (n=1). All had had previous surgery, including prior RVOT conduit implantation in six. Two diameters of conduit 16mm (n=5) and 18mm (n=7) were used. At 24 months none of the patients has required surgical re-intervention, 9 of the 12 are in NYHA functional class I and three patients in NYHA class II. None of the conduits has shown evidence of progressive stenosis, dilation or aneurysm formation. Residual peak gradient of >40 mm Hg was observed in three patients, caused by kinking of the conduit at implantation in 1 and distal stenosis in the peripheral pulmonary arteries in 2 patients. Five patients developed severe pulmonary valve insufficiency (PI); the most common mechanism was prolapse of at least one of the valve leaflets. The XPV conduit is a promising innovation for RVOT reconstruction. Progressive PI requires however an improved design (geometry, thickness) of the valve leaflets.

Matched MeSH terms: Dilatation
The prevalence of Helicobacter pylori in patients with oesophageal stenosis

Ylmaz Ö, Temur A, Almal N, Dülger AC, Sasmaz MI

Trop Biomed, 2018 Dec 01;35(4):1148-1153.
PMID: 33601862

Oesophageal strictures often occur following esophagectomy which is performed for cases of oesophageal cancer. These patients require repeated dilation procedures. The aim of this study is to investigate the effects of dietary regimens, which are changed because of stenosis, caused by Helicobacter pylori (H. pylori). In this retrospective study, 28 patients who had operation for oesophageal cancer and underwent dilation due to development of stricture were studied. 30 female and 30 male patients who were admitted to the Gastroenterology Clinic with complaints of dyspepsia and did not receive treatment for the eradication of H. pylori were randomly selected and included in this study as a control group. Patients' histopathological records on the hemogram, biochemistry, and endoscopic biopsy were analysed. There were 26 H. pylori (+) cases (92.8 %) in the stenosis group consisting of 28 patients, and 37 H. pylori (+) cases (61.6%) in the control group consisting of 60 patients. These results were found to be statistically significant (P=0.003). The albumin level in the stenosis group was reported to be statistically low (P=0.002). The incidence of H. pylori was found to be significantly higher in patients with stenosis. We ascribed this outcome due to changes in dietary regimens. Our findings showed that the dietary regimens of all patients who underwent esophagectomy should be regulated during the postoperative period considering H. pylori. The relationship between H. pylori and stenosis was significant, there is a need for further research with a larger sample size to enrich the findings.

Matched MeSH terms: Dilatation
Fulltext Coronary artery abnormality in complete Kawasaki disease children treated with immunoglobulin

Mohd Amin Itam, Amelia Alias, Mat Bah, M.N.

Malaysian Journal of Paediatrics and Child Health, 2011;17(1):0-0.
MyJurnal

Intravenous immunoglobulin (IVIG) therapy in Kawasaki disease (KD) has been shown to reduce coronary artery aneurysm by 4-5%. However, we still observed significant number of coronary aneurysm post IVIG in our centre. The objectives of this study were to determine the prevalence of coronary artery abnormality (CAA) and the associated risk factors.
Designs: Retrospective descriptive study. Method: A retrospective study performed on children with KD from 1 st January 2005 to 30 th July 2010. Japanese Ministry of Health criteria were used to classify coronary arteries abnormality. Children with incomplete or atypical KD were excluded. Data were extracted from Pediatric Cardiology Clinical Information System.
Results: A total of 126 KD were diagnosed during the study period with 69% were male and 52.4% were Chinese. The median age of diagnosis was 1.4yr [Q1, 0.6yr Q3, 2.3yr]. Of these 126, 118 (93.7%) received IVIG within 10 days of illness. Ten patients (7.9%) required more than one dose of IVIG. CAA were noted in 28 (22.2%) patients with 21 ectasia, 4 small fusiform, one small saccular and 2 medium fusiform aneurysm. Of these 28, 22 who had IVIG within 10 days of illness (18 ectasia, 3 small and one medium coronary aneurysm) Significant risk factors for CAA were older children (2.3 v s 1.7yr, p=0.03), presentation after 10days of illness (p=0.006) and required more than 2gm/kg of IVIG (p=0.04).
Conclusion: CAA in complete KD treated with IVIG was 22.2% with 5.5% significant aneurysm. Risk factors for coronary abnormality were older children, late presentation and require more of IVIG of than 2gm/kg.

Matched MeSH terms: Dilatation, Pathologic
Fulltext Pathology of lymphatic filariasis

Mak JW

International e-Journal of Science, Medicine & Education, 2012;6 Suppl:S80-86.
MyJurnal

Developing and adult worms of the human lymphatic filarial parasites (Wuchereria bancrofti,
Brugia malayi, and Brugia timori) are located mainly in the lymphatic system and occasionally in aberrant sites like subcutaneous and conjunctival cysts. Lymphatic
pathology ranging from dilatation of lymphatic channels and lymphangiectasia are detected on ultrasonography in apparently healthy, amicrofilaraemic, but filarial antigen positive individuals in endemic areas. Microfilariae are distributed in various organs and may be associated with immune mediated pathology at these sites; tropical pulmonary eosinophilia is characterized by intense immune mediated destruction of microfilariae in the lung parenchyma. In the spleen and other sites, nodular granulomatous lesions can occur where microfilariae are trapped and destroyed. The finding of Wolbachia endosymbionts in all stages of lymphatic filarial parasites has provided new insight on the adverse reactions
associated with anti-filarial chemotherapy. Inflammatory molecules mainly lipopolysaccharide (LPS)-like molecules released from endosymbionts on death of the
parasites are largely responsible for the adverse reactions encountered during anti-filarial chemotherapy. Prenatal tolerance or sensitization to parasite derived molecules can immune-modulate and contribute to both pathology and susceptibility/resistance to infection. Pathological responses thus depend not only on exposure to filarial antigens/infection, but also on host-parasiteendosymbiont factors and to intervention with antifilarial treatment. Treatment induced or host mediated death of parasites are associated with various grades of inflammatory response, in which eosinophils and LPS from endosymbionts play prominent roles, leading to death of the parasite, granulomatous formation, organization and fibrosis. The non-human primate (Presbytis spp.) model of
Brugia malayi developed for the tertiary screening of anti-filarial compounds has provided unique opportunities for the longitudinal study of the pathology associated with lymphatic filariasis. The pathology in this non-human primate model closely follows that seen in
human lymphatic filarial infections and correlates with clinical evidence of lymphatic pathology as detected with ultrasonography. These studies also show that successful treatment as detected by loss of motility and calcification of worms on ultrasonography is associated with reversal of early dilatations of lymphatic channels.

Matched MeSH terms: Dilatation
Fulltext Management experience of subglottic stenosis by endoscopic bougie dilatation with mitomycin C and review of literature: case series

Liew YT, Yong DJ, Somasundran M, Lum CL

Indian J Otolaryngol Head Neck Surg, 2015 Mar;67(Suppl 1):129-33.
PMID: 25621268 DOI: 10.1007/s12070-014-0801-8

The aim of the study was to examine and analyze the epidemiology and outcome of treatment for paediatric acquired subglottic stenosis treated with endoscopic bougie dilatation and topical mitomycin C. There were 15 patients identified from 2008 until 2013. All of them had acquired subglottic stenosis due to history of intubation. Majority of the patients had grade III stenosis, with the total of seven. Three patients had grade IV; three were grade II and two were grade I. All of the patients with severe stenosis (grade III and IV) needed tracheostomy while only one in mild stenosis group (grade I and II) required it for prolonged ventilation rather than obstruction due to subglottic stenosis. All of them underwent direct laryngoscopy under general anesthesia followed by endoscopic dilatation with bougie and topical mitomycin C 0.4 mg/ml for 5 min. Aim of success in our study was decannulation of tracheostomy or absence of symptoms at exertion. We achieved 6 (60 %) successful decannulation out of 10 patients with tracheostomy (excluded the patient with tracheostomy in grade I stenosis due to prolonged ventilation). As for those without tracheostomy, 3 (75 %) out of 4 patients were asymptomatic even at exertion. Average number of dilatation was 3.1 times, with mean duration of 28 min. No complications were reported in our series. One patient with grade I stenosis passed away due to severe pneumonia unrelated to the stenosis or dilatation, and she did not have any dilatation before she passed away. Multiple related risk factors were identified such as intubation, prematurity, movement of endotracheal tube, respiratory infection, traumatic intubation and gastroesophageal reflux disease. Experience of open surgical method was very limited in our centre in Sabah in East Malaysia. Endoscopic technique plays an important role in treatment of subglottic stenosis with adjunct like mitomycin C possibly booster the successful rate.

Matched MeSH terms: Dilatation
Fulltext Bilateral Hydroureteronephrosis with a Hypertrophied, Trabeculated Urinary Bladder

Iqbal S, Raiz I, Faiz I

Malays J Med Sci, 2017 Mar;24(2):106-115.
PMID: 28894411 DOI: 10.21315/mjms2017.24.2.14

Bilateral hydroureteronephrosis involves the dilatation of the renal pelvis, calyces and ureter; it develops secondary to urinary tract obstruction and leads to a build-up of back pressure in the urinary tract, and it may lead to impairment of renal function and ultimately culminate in renal failure. Although clinically silent in most cases, it can be diagnosed as an incidental finding during evaluation of an unrelated cause. In a minority of patients, it presents with signs and symptoms. Renal calculus is the most common cause, but there are multiple non-calculus aetiologies, and they depend on age and sex. Pelviureteric junction obstruction, benign prostatic hypertrophy, urethral stricture, neurogenic bladder, retroperitoneal mass and bladder outlet obstruction are some of the frequent causes of hydroureteronephrosis in adults. The incidence of non-calculus hydronephrosis is more common in males than in females. Ultrasonography is the most important baseline investigation in the evaluation of patients with hydronephrosis. Here, we report a rarely seen case of bilateral hydroureteronephrosis associated with a hypertrophied, trabeculated bladder in an adult male cadaver, suspected to be due to a primary bladder neck obstruction, and analyse its various other causes, clinical presentations and outcomes.

Matched MeSH terms: Dilatation
Congenital nasal cavity stenosis in children with craniosyntosis: A report of 4 rare cases

Liew YT, Soo SS, Nathan AM, Manuel AM

Auris Nasus Larynx, 2017 Oct;44(5):635-638.
PMID: 27793496 DOI: 10.1016/j.anl.2016.10.001

Congenital bony nasal stenosis (CBNS) is a very rare but life-threatening cause of airway obstruction in neonates and infants. This review aims to assess the presentation and early airway management of 4 new cases of craniosynostosis with bilateral nasal cavity stenosis. Patients were treated with endoscopic endonasal widening of the nasal cavity and stenting. All patients were extubated well post-operatively with resolution of symptoms. They remained asymptomatic with stents in situ for at least 6 months with no complications reported. Minimally invasive endoscopic endonasal widening of the nasal cavity with stenting is an effective and safe way of addressing nasal cavity stenosis.

Matched MeSH terms: Dilatation
Aneurysmal dilatation without distal obstruction: a rare complication of valved bovine jugular vein conduit

Qureshi AU, Abbaker AE, Sivalingam S, Latiff HA

World J Pediatr Congenit Heart Surg, 2014 Apr;5(2):348-51.
PMID: 24668992 DOI: 10.1177/2150135113509819

Valved bovine jugular vein (Contegra) conduit is considered a suitable choice for pediatric population with congenital heart defect requiring right ventricle to main pulmonary artery connection. Intermediate follow-up studies have shown the propensity of developing distal conduit stenosis and valve thrombosis. We present a rare case of aneurysmal dilatation of the conduit leading to valve failure requiring conduit explantation.

Matched MeSH terms: Dilatation, Pathologic
Fulltext Early Detection of Undiagnosed Abdominal Aortic Aneurysm and Sub-Aneurysmal Aortic Dilatations in Patients with High-Risk Coronary Artery Disease: The Value of Targetted Screening Programme

Saw ST, Leong BDK, Abdul Aziz DA

Vasc Health Risk Manag, 2020;16:215-229.
PMID: 32606718 DOI: 10.2147/VHRM.S250735

INTRODUCTION: Abdominal aortic aneurysm (AAA) and coronary artery disease (CAD) share common risk factors. The objective of this study was to determine the prevalence of undiagnosed AAA in patients with angiographically diagnosed significant CAD.
PATIENTS AND METHODS: Male patients aged 50 years and above (including indigenous people) with angiographically diagnosed significant CAD in the recent one year were screened for AAA. Standard definition of abdominal aortic aneurysm and CAD was used. All new patients were followed up for six months for AAA events (ruptured AAA and AAA-related mortality).
RESULTS: A total of 277 male patients were recruited into this study. The total prevalence of undiagnosed AAA in this study population was 1.1% (95% CI 0.2-3.1). In patients with high-risk CAD, the prevalence of undiagnosed AAA was 1.7% (95% CI 0.3-4.8). The detected aneurysms ranged in size from 35.0mm to 63.8mm. Obesity was a common factor in these patients. There were no AAA-related mortality or morbidity during the follow-up. Although the total prevalence of undiagnosed AAA is low in the studied population, the prevalence of sub-aneurysmal aortic dilatation in patients with significant CAD was high at 6.6% (95% CI 3.9-10.2), in which majority were within the younger age group than 65 years old.
CONCLUSION: This was the first study on the prevalence of undiagnosed AAA in a significant CAD population involving indigenous people in the island of Borneo. Targeted screening of patients with high-risk CAD even though they are younger than 65 years old effectively discover potentially harmful asymptomatic AAA and sub-aneurysmal aortic dilatations.

Matched MeSH terms: Dilatation, Pathologic