Bistra Zheleva

Ms. Bistra Zheleva

orcid

Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2020 in The Lancet Child & Adolescent Health
Verified
Journal Article
Open access
MZMeghan S Zimmerman
Meghan S Zimmerman
ASAlison Grace Carswell Smith
Alison Grace Carswell Smith
CSCraig A Sable
Craig A Sable
MEMichelle Marie Echko
Michelle Marie Echko
LWLauren B Wilner
Lauren B Wilner
NKNicholas J Kassebaum
Nicholas J Kassebaum
Previous congenital heart disease estimates came from few data sources, were geographically narrow, and did not evaluate congenital heart disease throughout the life course. Completed as part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2017, this study aimed to provide comprehensive estimates of congenital heart disease mortality, prevalence, and disability by age for 195 countries and territories from 1990 to 2017. Mortality estimates were generated for aggregate congenital heart disease and non-fatal estimates for five subcategories (single ventricle and single ventricle pathway congenital heart anomalies; severe congenital heart anomalies excluding single ventricle heart defects; critical malformations of great vessels, congenital valvular heart disease, and patent ductus arteriosus; ventricular septal defect and atrial septal defect; and other congenital heart anomalies), for 1990 through to 2017. All available global data were systematically analysed to generate congenital heart disease mortality estimates (using Cause of Death Ensemble modelling) and prevalence estimates (DisMod-MR 2·1). Systematic literature reviews of all types of congenital anomalies to capture information on prevalence, associated mortality, and long-term health outcomes on congenital heart disease informed subsequent disability estimates. Congenital heart disease caused 261 247 deaths (95% uncertainty interval 216 567-308 159) globally in 2017, a 34·5% decline from 1990, with 180 624 deaths (146 825-214 178) being among infants (aged <1 years). Congenital heart disease mortality rates declined with increasing Socio-demographic Index (SDI); most deaths occurred in countries in the low and low-middle SDI quintiles. The prevalence rates of congenital heart disease at birth changed little temporally or by SDI, resulting in 11 998 283 (10 958 658-13 123 888) people living with congenital heart disease globally, an 18·7% increase from 1990 to 2017, and causing a total of 589 479 (287 200-973 359) years lived with disability. Congenital heart disease is a large, rapidly emerging global problem in child health. Without the ability to substantially alter the prevalence of congenital heart disease, interventions and resources must be used to improve survival and quality of life. Our findings highlight the large global inequities in congenital heart disease and can serve as a starting point for policy changes to improve screening, treatment, and data collection. Bill & Melinda Gates Foundation.

1 November 2014 in Pediatrics
Verified
Journal Article
Open access
PDF file
Kathy J. JenkinsKathy J. Jenkins
Kathy J. Jenkins
ACAldo R. Castañeda
Aldo R. Castañeda
KCK.M. Cherian
K.M. Cherian
CCChris A. Couser
Chris A. Couser
EDEmily K. Dale
Emily K. Dale
JCJan T. Christenson
Jan T. Christenson
BACKGROUND: There is little information about congenital heart surgery outcomes in developing countries. The International Quality Improvement Collaborative for Congenital Heart Surgery in Developing World Countries uses a registry and quality improvement strategies with nongovernmental organization reinforcement to reduce mortality. Registry data were used to evaluate impact. METHODS: Twenty-eight sites in 17 developing world countries submitted congenital heart surgery data to a registry, received annual benchmarking reports, and created quality improvement teams. Webinars targeted 3 key drivers: safe perioperative practice, infection reduction, and team-based practice. Registry data were audited annually; only verified data were included in analyses. Risk-adjusted standardized mortality ratios (SMRs) and standardized infection ratios among participating sites were calculated. RESULTS: Twenty-seven sites had verified data in at least 1 year, and 1 site withdrew. Among 15 049 cases of pediatric congenital heart surgery, unadjusted mortality was 6.3% and any major infection was 7.0%. SMRs for the overall International Quality Improvement Collaborative for Congenital Heart Surgery in Developing World Countries were 0.71 (95% confidence interval [CI] 0.62–0.81) in 2011 and 0.76 (95% CI 0.69–0.83) in 2012, compared with 2010 baseline. SMRs among 7 sites participating in all 3 years were 0.85 (95% CI 0.71–1.00) in 2011 and 0.80 (95% CI 0.66–0.96) in 2012; among 14 sites participating in 2011 and 2012, the SMR was 0.80 (95% CI 0.70–0.91) in 2012. Standardized infection ratios were similarly reduced. CONCLUSIONS: Congenital heart surgery risk-adjusted mortality and infections were reduced in developing world programs participating in the collaborative quality improvement project and registry. Similar strategies might allow rapid reduction in global health care disparities.

1 January 2017 in The Lancet
Verified
Journal Article
Closed access
BZBistra Zheleva
Bistra Zheleva
JAJ Brian Atwood
J Brian Atwood

8 January 2019 in World Journal of Surgery
Verified
Journal Article
Open access
PDF file
GSGlobal Initiative for Children’s Surgery
Global Initiative for Children’s Surgery
NWNaomi Wright
Naomi Wright
GJGuy Jensen
Guy Jensen
ESEtienne St‐Louis
Etienne St‐Louis
DGDavid Grabski
David Grabski
DFDiana Farmer
Diana Farmer
Background: Recommendations by the Lancet Commission on Global Surgery regarding surgical care in low‐ and middle‐income countries (LMICs) require development to address the needs of children. The Global Initiative for Children’s Surgery (GICS) was founded in 2016 to identify solutions to problems in children’s surgery by utilizing the expertise of practitioners from around the world. This report details this unique process and underlying principles.Methods: Three global meetings convened providers of surgical services for children. Through working group meetings, participants reviewed the status of global children’s surgery to develop priorities and identify necessary resources for implementation. Working groups were formed under LMIC leadership to address specific priorities. By creating networking opportunities, GICS has promoted the development of LMIC‐LMIC and HIC‐LMIC partnerships.Results: GICS members identified priorities for children’s surgical care within four pillars: infrastructure, service delivery, training and research. Guidelines for provision of care at every healthcare level based on these pillars were created. Seventeen subspecialty, LMIC chaired working groups developed the Optimal Resources for Children’s Surgery (OReCS) document. The guidelines are stratified by subspecialty and level of health care: primary health center, first‐, second‐ and third‐level hospitals, and the national children’s hospital. The OReCS document delineates the personnel, equipment, facilities, procedures, training, research and quality improvement components at all levels of care.Conclusion: Worldwide collaboration with leadership by providers from LMICs holds the promise of improving children’s surgical care. GICS will continue to evolve in order to achieve the vision of safe, affordable, timely surgical care for all children.

4 May 2023 in BMJ Global Health
Verified
Journal Article
Open access
PDF file
BHBabar S Hasan
Babar S Hasan
ABAreesh Bhatti
Areesh Bhatti
SMShazia Mohsin
Shazia Mohsin
PBPaul Barach
Paul Barach
EAEltayeb Ahmed
Eltayeb Ahmed
BZBistra Zheleva
Bistra Zheleva
The global burden of paediatric and congenital heart disease (PCHD) is substantial. We propose a novel public health framework with recommendations for developing effective and safe PCHD services in low-income and middle-income countries (LMICs). This framework was created by the Global Initiative for Children’s Surgery Cardiac Surgery working group in collaboration with a group of international rexperts in providing paediatric and congenital cardiac care to patients with CHD and rheumatic heart disease (RHD) in LMICs. Effective and safe PCHD care is inaccessible to many, and there is no consensus on the best approaches to provide meaningful access in resource-limited settings, where it is often needed the most. Considering the high inequity in access to care for CHD and RHD, we aimed to create an actionable framework for health practitioners, policy makers and patients that supports treatment and prevention. It was formulated based on rigorous evaluation of available guidelines and standards of care and builds on a consensus process about the competencies needed at each step of the care continuum. We recommend a tier-based framework for PCHD care integrated within existing health systems. Each level of care is expected to meet minimum benchmarks and ensure high-quality and family centred care. We propose that cardiac surgery capabilities should only be developed at the more advanced levels on hospitals that have an established foundation of cardiology and cardiac surgery services, including screening, diagnostics, inpatient and outpatient care, postoperative care and cardiac catheterisation. This approach requires a quality control system and close collaboration between the different levels of care to facilitate the journey and care of every child with heart disease. This effort was designed to guide readers and leaders in taking action, strengthening capacity, evaluating impact, advancing policy and engaging in partnerships to guide facilities providing PCHD care in LMICs.

6 February 2019 in World Journal of Surgery
Verified
Journal Article
Open access
PDF file
GSGlobal Initiative for Children’s Surgery
Global Initiative for Children’s Surgery
DGDavid Grabski
David Grabski
EAEmmanuel Ameh
Emmanuel Ameh
DODoruk Ozgediz
Doruk Ozgediz
KOKeith Oldham
Keith Oldham
SBStephen Bickler
Stephen Bickler