495 research outputs found
Coaching Secondary Teachers To Engage Students By Incorporating Storytelling Into Content-Area Instruction
Currently, school leaders are being called to action to find ways of improving the literacy achievement of today’s youth in response to the escalating number of students exiting high school unprepared for postsecondary educational programs and the workforce. Literacy coaching, as an embedded professional development model is one effective approach that can provide essential leadership and support for school and district-wide literacy reform. This qualitative single case study considers secondary literacy coaching in situ (in the natural setting) as a professional development model and the extent to which it supports the integration of literacy practices within disciplinary subjects. This study also pursues the use of storytelling as a hook to spark student interest in content material and engage them in project-based learning.
The study explored three research questions: 1) How does the role of secondary literacy coaching in situ (in the natural setting) support content teachers with introducing and embedding literacy strategies into their core subjects? 2) How can storytelling spark student interest in learning content material? 3) How does storytelling enhance student engagement and act as a catalyst for project-based, self-directed learning? Data collection included field observation notes, written reflections, documentation artifacts, a teacher questionnaire, and a focus group discussion with administrators. Data was analyzed using Creswell’s (2013) Data Analysis Spiral. Three rounds of coding were applied to determine categories which illuminated overall themes. Triangulation (Creswell, 2013) was used to corroborate evidence and validate findings through cross verification from multiple sources. This empirical investigation supports literacy coaching in situ as a powerful professional development model that can positively impact the teaching practices of secondary teachers and provide district and school-wide support for administrators. It also confirmed the benefit of story as a motivational hook for engaging adolescents in challenging disciplinary studies. Finally, it served to add to the discussion of current theories by providing effective ways to educate our youth, so they are prepared to meet the increasing challenges of our global 21st century society
Isolated Atrial Lead Conduction Delay following Right Atrial Radiofrequency Maze Procedure
A 60-year-old man with a dual-chamber implantable cardioverter defibrillator and severe dyspnea on exertion due to apical hypertrophic cardiomyopathy underwent a septal myectomy and radiofrequency maze procedure. Following the procedure a persistent delay in atrial sensing was observed and was most likely a result of iatrogenic conduction delay from right atrial ablation lines. These observations suggest that atrial conduction properties can be altered during the surgical maze procedure and should be considered in the differential diagnosis of sensing or pacing malfunction
When should a mechanical tricuspid valve replacement be considered?
BackgroundIsolated mechanical tricuspid valve replacement (mTVR) is uncommon, early mortality is reported to be high, and little is known regarding the long-term outcome. We sought to evaluate the long-term outcome of mTVR.MethodsFrom 1980 to 2007, isolated mTVR was performed in 64 patients (33 men) at our institution; the median age was 45.5 years (6-71 years). There were 2192 tricuspid valve (TV) repairs and 137 isolated bioprosthetic TV replacements during the same time interval. Valve dysfunction was caused by congenital TV abnormality in 45 patients (70%), carcinoid heart disease in 13 (20%), traumatic TV regurgitation in 3 (5%), and other reason in 3 (5%). Twenty-three patients (36%) had at least 1 previous cardiac procedure (TV repair in 8 and bioprosthetic TV replacement in 7).ResultsMechanical prostheses used included Starr-Edwards (before 1993) in 36 patients (56%) and bileaflet prostheses in 28 (44%). Concomitant procedures included atrial septal defect closure in 28 (44%), arrhythmia surgery in 11 (17%), and pulmonary valvectomy for carcinoid disease in 10 patients (16%). Early mortality occurred in 5 patients (7.8%). Early morbidity included a permanent pacemaker in 9 (14%) and reexploration for bleeding in 2 patients (3%). Mean follow-up was 6 years (maximum 22.4 years). Five- and 10-year survival was 65% and 58%, respectively. There was no valve-related mortality. Late morbidity included valve thrombosis in 5 patients (8%); 3 were managed nonoperatively and 2 underwent TV rereplacement.ConclusionsIsolated mTVR still leads to increased early mortality. A mechanical valve can be considered in select situations when anticoagulation is necessary and in the presence of good right ventricular function
Does the dilated ascending aorta in an adult with congenital heart disease require intervention?
ObjectivesThere is increasing attention to prophylactic replacement of the moderately dilated ascending aorta at aortic valve surgery. Moderate ascending aortic dilatation is common in adult patients with conotruncal anomalies. There are no data outlining actual risk of progressive ascending aortic dilatation or dissection to provide management guidelines.MethodsFrom December 1973 through January 2008, 81 consecutive adults (median age, 34 years; range, 18--59 years) with conotruncal anomalies underwent operation on the aortic root, ascending aorta, or aortic valve. Primary cardiac diagnoses included tetralogy of Fallot with or without pulmonary atresia in 60 patients, truncus arteriosus in 12, double-outlet right ventricle in 6, and other in 3. Indications for operation included aortic regurgitation in 69 patients, supracoronary ascending aneurysm in 16, aortic stenosis in 5, and other in 8. Median ascending aortic size was 45 mm (23--80 mm).ResultsOperations included isolated aortic valve repair/replacement in 63 patients, combined aortic valve replacement and reduction aortoplasty in 9, aortic root replacement in 7, and isolated ascending aortic replacement in 2. Four patients required reoperation during a median follow-up of 3.8 years (maximum 31 years). There were no ascending aortic reoperations after previous reduction aortoplasties or supracoronary ascending aortic grafts, and there were no late aortic dissections.ConclusionsModerate ascending aortic enlargement is common among patients with conotruncal anomalies coming to operation, but aortic dissection is rare, as is subsequent need for aortic reoperation. Despite current enthusiasm for prophylactic operations on the ascending aorta in patients with acquired disease, these data suggest that the moderately dilated aorta in this setting may be observed
Clinical accuracy of RIFLE and Acute Kidney Injury Network (AKIN) criteria for acute kidney injury in patients undergoing cardiac surgery
Increased risk of acute kidney injury in patients undergoing tricuspid valve surgery
OBJECTIVES We aimed to determine which patients undergoing tricuspid valve (TV) surgery are at increased risk for acute kidney injury (AKI). METHODS We reviewed 951 patients [mean age 67 ± 13 years, 573 (60%) female] having TV surgery between 2000 and 2007. Analysis focused on clinical outcome; AKI was defined by the consensus RIFLE criteria (risk, injury, failure). RESULTS Surgical procedures included isolated TV surgery in 224 (24%) and TV surgery in conjunction with another cardiac operation in 727 (76%) patients. TV surgery involved redo surgery in 395 (42%). The incidence of postoperative AKI was 30% (n = 285), and 75 (7.9%) of these patients required renal replacement therapy. AKI stratified by increased RIFLE class was associated with worse postoperative outcomes (prolonged intubation, length of hospital stay and mortality; P < 0.001 for each variable). For patients with AKI, odds ratio for mortality was 4.2 [95% confidence interval (CI) 3.2-5.4, P < 0.001; area under receiver operating curves 0.85 (95% CI 0.80-0.91)], and 2.3 (95% CI 1.9-2.9, P < 0.001) for prolonged intubation for each increase in RIFLE class. Independent risk factors for AKI were older age, male gender, previous surgery, preoperative anaemia, length of cardiopulmonary bypass and TV replacement. Importantly, preoperative creatinine and pulmonary artery pressure were not independently associated with AKI. CONCLUSIONS TV surgery carries a high incidence of postoperative AKI that is associated with adverse outcome. The use of the RIFLE criteria allows comparison with prior studies and is an important predictor of early mortality. The estimation of patient risk for AKI should be based on multivariable predictio
Medical and surgical outcome of tricuspid regurgitation caused by flail leaflets
AbstractObjectiveWe sought to evaluate the medical and surgical outcome of tricuspid regurgitation caused by flail leaflets.MethodsWe analyzed the cause, clinical presentation, outcome, and natural history of 60 patients with tricuspid regurgitation caused by flail leaflets, a cause of mostly severe and organic tricuspid regurgitation, diagnosed by means of echocardiography between 1980 and 2000.ResultsThe main cause was traumatic (62%). Clinical presentation was often severe: 57% were symptomatic, 33% had a history of congestive heart failure, and 40% had a history of atrial fibrillation. Compared with expected survival of the US matched population, excess mortality (39% ± 10% at 10 years or 4.5% yearly, P < .01) was observed. Even patients asymptomatic at presentation experienced high tricuspid-related event rates (at 10 years, 75% ± 15% had symptoms or heart failure, atrial fibrillation, surgical intervention, or death). In those patients severe enlargement of right-sided chambers was predictive of poor outcome (at 5 years: 86% ± 9% vs 39% ± 11%, P < .01) independent of cause (P = .31). The poor medical outcome was further confirmed by high event rates (69% ± 9% at 15 years) in the natural history beginning from the flail's occurrence. Tricuspid operations were performed in 33 patients (55% ± 7% at 5 years), with valve repair in 82%, low mortality (3%), and, despite frequently refractory atrial fibrillation, symptomatic improvement in 88%.ConclusionTricuspid regurgitation caused by flail leaflets is a serious disease associated with excess mortality and high morbidity. Tricuspid valve repair can often be performed with low risk, allowing symptomatic improvement. These results suggest that surgical intervention should be considered early in the course of the disease before the occurrence of irreversible consequences
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