Edward Malec
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View article: Postoperative pain outcome following a superficial parasternal intercostal plane block in children undergoing pediatric heart surgery: a retrospective cohort study
Postoperative pain outcome following a superficial parasternal intercostal plane block in children undergoing pediatric heart surgery: a retrospective cohort study Open
This study showed that implementation of a SPIP block might further improve postoperative pain management following cardiac surgery in children. However, due to lower baseline pain intensity in the control group primary outcome failed sign…
View article: Fetal hypoplastic left heart syndrome and neonatal follow-up in Polish Mother’s Memorial Hospital Research Institute report from January 2023 to January 2024: an improvement of survival rate
Fetal hypoplastic left heart syndrome and neonatal follow-up in Polish Mother’s Memorial Hospital Research Institute report from January 2023 to January 2024: an improvement of survival rate Open
Prenatal echocardiographic data do not equate to cardiac surgery data, as they include deaths in utero, terminations of pregnancy, and deaths after delivery (presurgery mortality). In consultations with future parents following the prenata…
View article: Significance of additional pulmonary blood flow between second and third stage in Fontan pathway
Significance of additional pulmonary blood flow between second and third stage in Fontan pathway Open
APBF does not result in higher oxygen saturation, both before and after Fontan completion. APBF can stimulate the growth of the pulmonary arteries and increase the pulmonary artery pressure. The presence of APBF does not affect the post-op…
View article: Significance of additional pulmonary blood flow between second and third stage in Fontan pathway
Significance of additional pulmonary blood flow between second and third stage in Fontan pathway Open
Background The benefit of additional pulmonary blood flow (APBF) in Fontan pathway remains controversial. The aim of the study was to analyze the systemic arterial saturation, ventricular and atrioventricular (AV) valve function, developme…
View article: The mass density contrast in perturbed Friedman-Lemaitre-Robertson-Walker cosmologies
The mass density contrast in perturbed Friedman-Lemaitre-Robertson-Walker cosmologies Open
We analyze the evolution of the mass density contrast in spherical perturbations of flat Friedman-Lemaitre-Robertson-Walker cosmologies. Both dark matter and dark energy are included. In the absence of dark energy the evolution equation co…
View article: The Mass Density Contrast in Perturbed Friedman–Lemaître–Robertson–Walker Cosmologies
The Mass Density Contrast in Perturbed Friedman–Lemaître–Robertson–Walker Cosmologies Open
In this paper, we have introduced two versions of the jerk model.These versions are commensurate fractional and distributed orders.They appear in several applications of physics and engineering, e.g., laser physics, damped harmonic oscilla…
View article: Prenatal diagnosis of interrupted aortic arch and oesophageal atresia – monitoring and postnatal management with positive outcome – case report
Prenatal diagnosis of interrupted aortic arch and oesophageal atresia – monitoring and postnatal management with positive outcome – case report Open
AMA Biały Ł, Sylwestrzak O, Maroszyńska I, et al. Prenatal diagnosis of interrupted aortic arch and oesophageal atresia – monitoring and postnatal management with positive outcome – case report. Prenatal Cardiology. 2023;(1). doi:10.5114/p…
View article: A case of aortopulmonary window mimicking common arterial trunk on fetal echocardiography
A case of aortopulmonary window mimicking common arterial trunk on fetal echocardiography Open
AMA Wiecheć M, Nocuń A, Merta M, Januszewska K, Malec E. A case of aortopulmonary window mimicking common arterial trunk on fetal echocardiography. Prenatal Cardiology. 2023;(1). doi:10.5114/pcard.2023.135413. APA Wiecheć, M., Nocuń, A., M…
View article: Recommendation of the Polish Prenatal Cardiology Society on the Regulation of the Polish Ministry of Health concerning competencies in fetal echocardiography (code 013) and fetal cardiology (code 021)
Recommendation of the Polish Prenatal Cardiology Society on the Regulation of the Polish Ministry of Health concerning competencies in fetal echocardiography (code 013) and fetal cardiology (code 021) Open
AMA Respondek-Liberska M, Murlewska J, Wielgoś M, et al. Recommendation of the Polish Prenatal Cardiology Society on the Regulation of the Polish Ministry of Health concerning competencies in fetal echocardiography (code 013) and fetal car…
View article: Steady critical accretion onto black holes: Self-gravity and sonic point characteristics
Steady critical accretion onto black holes: Self-gravity and sonic point characteristics Open
The spherically symmetric steady accretion of polytropic perfect fluids onto a black hole is the simplest flow model that can demonstrate effects of backreaction (selfgravity). It has been discovered 16 years ago that backreaction does not…
View article: Against all odds—late repair of multiple shunt lesions in a patient with Down syndrome: a case report
Against all odds—late repair of multiple shunt lesions in a patient with Down syndrome: a case report Open
Background Children with congenital heart defects (CHD) usually undergo elective surgical repair of haemodynamically relevant shunt lesions within the first year of life. Due to susceptibility for pulmonary arterial hypertension (PAH) in p…
View article: Stationary massive disks around black holes: Realistic equation of state and bifurcation
Stationary massive disks around black holes: Realistic equation of state and bifurcation Open
We study stationary and axially symmetric black hole-disk systems, assuming a combination of the DD2 and Timmes-Swesty equations of state and a three-parameter family of rotation laws. There exist two branches of solutions that are shown t…
View article: Extensions of the Penrose inequality with angular momentum
Extensions of the Penrose inequality with angular momentum Open
We numerically investigate the validity of recent modifications of the Penrose inequality that include angular momentum. Formulations expressed in terms of asymptotic mass and asymptotic angular momentum are contradicted. We analyze numeri…
View article: In Memoriam: William I. Norwood Jr (1941-2020)
In Memoriam: William I. Norwood Jr (1941-2020) Open
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View article: Guidelines for the management of neonates and infants with hypoplastic left heart syndrome: The European Association for Cardio-Thoracic Surgery (EACTS) and the Association for European Paediatric and Congenital Cardiology (AEPC) Hypoplastic Left Heart Syndrome Guidelines Task Force
Guidelines for the management of neonates and infants with hypoplastic left heart syndrome: The European Association for Cardio-Thoracic Surgery (EACTS) and the Association for European Paediatric and Congenital Cardiology (AEPC) Hypoplastic Left Heart Syndrome Guidelines Task Force Open
The IPCCC is a standardized international system of paediatric and congenital cardiac nomenclature that should be used in all registries, databases and research studies in the domain of paediatric and congenital cardiac care, including tho…
View article: General-relativistic rotation laws in fluid tori around spinning black holes
General-relativistic rotation laws in fluid tori around spinning black holes Open
We obtain rotation laws for axially symmetric, self-gravitating and stationary fluids around spinning black holes. They reduce—in the Newtonian limit—to monomial rotation curves. For spinless black holes, one obtains in the first post-Newt…
View article: Right atrial cardiac myxoma and multiple pulmonary artery aneurysms: Is there a causal relationship?
Right atrial cardiac myxoma and multiple pulmonary artery aneurysms: Is there a causal relationship? Open
Cardiac myxomas are rare occurrences in pediatric populations, as are pulmonary artery aneurysms. We report a 17‐year‐old adolescent with right atrial cardiac myxoma and concomitant multiple peripheral pulmonary artery aneurysms. Histologi…
View article: Geometry of the pulmonary arteries before the Fontan operation: can we influence it during the Norwood procedure?
Geometry of the pulmonary arteries before the Fontan operation: can we influence it during the Norwood procedure? Open
OBJECTIVES The right ventricle-to-pulmonary artery (RV-PA) shunt provides stable haemodynamics after the Norwood procedure but can influence development of the central pulmonary arteries (PAs). The goal of this study was to analyse the geo…
View article: Elastica degeneration and intimal hyperplasia lead to Contegra® conduit failure
Elastica degeneration and intimal hyperplasia lead to Contegra® conduit failure Open
OBJECTIVES Currently, Contegra® grafts (processed bovine jugular vein conduits) are widely used for reconstructive surgery of the right ventricular outflow tract in patients with congenital heart disease (CHD). We analysed explanted Conteg…
View article: Modelling general-relativistic disc in OJ 287
Modelling general-relativistic disc in OJ 287 Open
We model a self-gravitating disc in Keplerian motion around the primary black hole in the binary black hole system OJ 287, employing a consistently general-relativistic approach. Our models satisfy either geometric requirements on the disc…
View article: Extubation on the operating table in patients with right ventricular pressure overload undergoing biventricular repair†
Extubation on the operating table in patients with right ventricular pressure overload undergoing biventricular repair† Open
OBJECTIVES Right ventricular pressure overload, which can result in restrictive right ventricular physiology, predicts slow recovery after biventricular repair of congenital heart defects. The goal of the study was to assess how extubation…
View article: Aortic atresia with the interrupted aortic arch and an pulmonary–coronary fistula: the unique constellation for survival
Aortic atresia with the interrupted aortic arch and an pulmonary–coronary fistula: the unique constellation for survival Open
Aortic atresia with interrupted aortic arch is a rare anatomical and physiological combination. Survival is possible if there is blood flow in the ascending aorta supplying the coronary circulation from coexisting malformations. We present…
View article: Two mass conjectures on axially symmetric black hole-disk systems
Two mass conjectures on axially symmetric black hole-disk systems Open
We analyze stationary self-gravitating disks around spinning black holes that satisfy the recently found general-relativistic Keplerian rotation law. There is a numerical evidence that the angular velocity, circumferential radius and angul…
View article: Black holes: do they exist?
Black holes: do they exist? Open
Black holes entered scientific literature as early as at the end of eighteenth century. They had been known at that time as dark stars, but their concept did not find its way to physics or astronomy, and had been abandoned for more than on…
View article: General-relativistic rotation: Self-gravitating fluid tori in motion around black holes
General-relativistic rotation: Self-gravitating fluid tori in motion around black holes Open
We obtain from the first principles a general-relativistic Keplerian rotation\nlaw for self-gravitating disks around spinning black holes. This is an\nextension of a former rotation law that was designed mainly for toroids around\nspin-les…
View article: Self-gravitating axially symmetric disks in general-relativistic rotation
Self-gravitating axially symmetric disks in general-relativistic rotation Open
We integrate numerically axially symmetric stationary Einstein equations describing self-gravitating disks around spinless black holes. The numerical scheme is based on a method developed by Shibata, but contains important new ingredients.…
View article: General-relativistic rotation: self-gravitating fluid tori in Keplerian motion around black holes
General-relativistic rotation: self-gravitating fluid tori in Keplerian motion around black holes Open
We obtain from the first principles a general-relativistic Keplerian rotation law for self-gravitating disks around spinning black holes. This is an extension of a former rotation law that was designed mainly for toroids around spinless bl…
View article: General-relativistic rotation laws in rotating fluid bodies, new weak-field effects and the post-Newtonian expansion
General-relativistic rotation laws in rotating fluid bodies, new weak-field effects and the post-Newtonian expansion Open
Recent general-relativistic extensions of Newtonian rotation laws for self-gravitating stationary fluids allow one to rederive, in the first post-Newtonian approximation, the well known geometric dragging of frames, and two new weak-field …