Israel Medical Association Journal

Background: Heart failure with preserved ejection fraction (HFpEF) is a common clinical entity, with a mechanism that appears to involve endothelial dysfunction of the cardiac microcirculation. Endothelial progenitor cells (EPC) are bone marrow derived cells that are able to differentiate into functional endothelial cells and participate in endothelial surface repair.

Objectives: To compare the level and function of EPCs in patients with HFpEF compared with heart failure with reduced ejection fraction (HFrEF) and control subjects.

Methods: We enrolled 21 patients with HFpEF (LVEF ≥ 50%, age 74.5 ± 9.9 years, 43% men, 48% diabetes), 20 patients with HFrEF (LVEF < 40%, age 70 ± 11.5 years, 90% men, 60% diabetes), and 11 control subjects with cardiovascular risk factors (age 53.3 ± 6.1years, 90% men, 64% diabetes). Circulating EPC levels were evaluated by expression of vascular endothelial growth factor receptor-2 (VEGFR-2), CD34, and CD133 by flow-cytometry. EPCs colony forming units (CFUs) were quantified after 7 days in culture.

Results: The proportion of cells that co-expressed VEGFR-2 and CD34 or VEGFR-2 and CD133 was similar among the HFpEF and HFrEF groups, and significantly lower than in the control group. The number of EPC-CFUs was also similar among the two heart failure groups and significantly lower than the control group.

Conclusions: Patients with HFpEF, like HFrEF, have significant reduction in EPC level and function.

Background: Consent rates for organ donation remain one of the most important factors determining the number of organs available for transplantation. Trauma casualties constitute a substantial part of the deceased organ donor pool and have unique characteristics that distinguish them from the general donor population. However, this group has not been extensively studied.

Objectives: To identify donor factors associated with positive familial consent for solid organ donation among trauma casualties.

Methods: This retrospective study included all trauma casualties who were admitted to the Rabin Medical Center, Beilinson hospital, during the period from January 2008 to December 2017, who were potential organ donors. Data collected included demographic features, the nature of the injury, surgical interventions, and which organs were donated. Data was collected from the Rabin Medical Center Trauma Registry.

Results: During the study period 24,504 trauma patients were admitted and 556 died over their hospital course. Of these 76 were potential donors, of whom 32 became actual donors and donated their organs. Two factors showed a statistically significant correlation to donation, namely female gender (P = 0.018) and Jewish religion of the deceased (P = 0.032).

Conclusions: Only a small group of in hospital trauma deaths were potential solid organ donors (13.7%) and less than half of these became actual donors. Consent rates were higher when the deceased was female or Jewish

Background: The incidence of congenital cytomegalovirus (CMV) infection in Israel is 0.7%. Only 10–15% are symptomatic. Valganciclovir has been shown to improve hearing and neurodevelopmental outcomes in neonates with symptomatic congenital CMV infection. Targeted examination of infants who fail routine neonatal hearing screening or have clinical or laboratory findings suggestive of symptomatic congenital CMV infection may be a cost-effective approach.

Objectives: To assess the possibility of targeted examination for the detection of newborns with symptomatic congenital CMV infection.

Methods: A prospective observational study was conducted in 2014–2015 at two medical centers in northern Israel. Included were all newborns who were tested in the first 3 days of life by polymerase chain reaction (PCR) for urine CMV DNA (n=692), either for failure the hearing screening (n=539, 78%), clinical or laboratory findings suggestive of symptomatic congenital CMV infection, or primary CMV infection during pregnancy (n=153, 22%).

Results: During the study period 15,433 newborns were born. The predicted rate of infection was 10–15% (symptomatic) of 0.7% of newborns, namely 0.07–0.105% or 10–15 infants. In fact, 15 infants (0.11%, 95% confidence interval 0.066–0.175) were diagnosed with symptomatic congenital CMV infection, 2/539 (0.37%) in the failed hearing group and 13/153 (8%) in the clinical/laboratory findings group. The incidence of symptomatic congenital CMV infection was within the predicted range.

Conclusions: Targeted examination of only 4.5% (n=692) of newborns detected the predicted number of infants with symptomatic congenital CMV infection in whom valganciclovir therapy is recommended

Background: Point shear-wave elastography (pSWE) is a new method to assess the degree of liver fibrosis. It has been shown to be effective in detecting stiffness in viral hepatitis.

Objectives: To determine the feasibility of pSWE for assessing liver stiffness and fibrosis in liver diseases of different etiologies.

Methods: This prospective single-center study included a population of adult patients with chronic liver diseases from different etiologies, who were scheduled for liver biopsy, and a control group of healthy adults who prospectively underwent pSWE. Ten consecutive pSWE measurements of the liver were performed using a Philips iU22 ultrasound system. Stiffness degree was compared to liver biopsy results. Fibrosis degree was staged according to METAVIR scoring system.

Results: The study group was comprised of 202 patients who underwent liver biopsy and pSWE test and a control group consisting of 14 healthy adults who underwent pSWE for validation. In the study group, the median stiffness was 5.35 ± 3.37 kilopascal (kPa). The median stiffness for F0–1, F2, F3, and F4 as determined by liver biopsy results were 4.9 kPa, 5.4 kPa, 5.7 kPa, and 8 kPa, respectively. The median stiffness in the control group was 3.7 ± 0.6 kPa. Subgroup analyses were conducted for viral hepatitis vs. non-viral hepatitis and steatohepatitis vs. non-steatohepatitis groups.

Conclusions: pSWE is a reproducible method for assessing liver stiffness and is in a linear relationship with fibrosis degree as seen in pathology. Compared with patients with non-significant fibrosis, healthy controls showed significantly lower values

Background: Many countries have adopted a mandatory routine pulse oximetry screening of newborn infants to identify babies with otherwise asymptomatic critical congenital heart disease (CCHD).

Objectives: To describe the current status of pulse oximetry CCHD screening in Israel, with a special emphasis on the experience of the Shaare Zedek Medical Center.

Methods: We review the difficulties of the Israeli Medical system with adopting the SaO₂ screening, and the preliminary results of the screening at the Shaare Zedek Medical Center, both in terms of protocol compliance and CCHD detection.

Results: Large scale protocol cannot be implemented in one day, and regular quality assessment programs must take place in order to improve protocol compliance and identify the reasons for protocol failures.

Conclusions: Quality control reviews should be conducted soon after implementation of the screening to allow for prompt diagnosis and quick resolution

Germany was a scientifically advanced country in the 19th and early 20th centuries, particularly in medicine, with a major interest in research and the treatment of tuberculosis. From 1933 until 1945, Nazi Germany perverted scientific research through criminal experimentations on captured prisoners of war and on "subhumans" by scientifically untrained, but politically driven, staff. This article exposes a series of failed experiments on tuberculosis in adults, experiments without scientific validity. Nonetheless, Dr. Kurt Heißmeyer repeated the experiment on Jewish children, who were murdered for the sake of personal academic ambition. It is now 75 years since liberation and the murdered children must be remembered. This observational review raises questions of medical and ethical values

Background: Pancreatic trauma is uncommon in pediatric patients and presents diagnostic and therapeutic challenges. While non-operative management (NOM) of minor pancreatic injuries is well accepted, the management of major pancreatic injuries remains controversial.

Objectives: To evaluate management strategies for major blunt pancreatic injury in children.

Methods: Data were retrospectively collected for all children treated for grade III or higher pancreatic injury due to blunt abdominal trauma from 1992 to 2015 at two medical centers. Data included demographics, mechanism of injury, laboratory and imaging studies, management strategy, clinical course, operative findings, and outcome.

Results: The cohort included seven boys and four girls aged 4–15 years old (median 9). Six patients had associated abdominal (mainly liver, n=3) injuries. The main mechanism of injury was bicycle (handlebar) trauma (n=6). Five patients had grade III injury and six had grade IV. The highest mean amylase level was recorded at 48 hours after injury (1418 U/L). Management strategies included conservative (n=5) and operative treatment (n=6): distal (n=3) and central (n=1) pancreatectomy, drainage only (n=2) based on the computed tomography findings and patient hemodynamic stability. Pseudocyst developed in all NOM patients (n=5) and two OM cases, and one patient developed a pancreatic fistula. There were no differences in average length of hospital stay.

Conclusions: NOM of high-grade blunt pancreatic injury in children may pose a higher risk of pseudocyst formation than OM, with a similar hospitalization time. However, pseudocyst is a relatively benign complication with a high rate of spontaneous resolution with no need for surgical intervention.

Background: Injuries to the anterior cruciate ligament (ACL) are common and complete tears often fail to heal. ACL reconstruction is considered the surgical gold standard of care for ACL injuries in young active patients.

Objectives: To determine the corresponding morphological and histological features of the torn ACL in different time periods after injury.

Methods: The study included 28 remnant specimens of torn ACLs from patients who had ACL reconstruction surgery of the knee. The remnant pathology was evaluated by its morphology during arthroscopy and by histopathologic measurements.

Results: At surgery there were three progressive and distinct morphological tear patterns. The first pattern was noticed within the first 3 months from injury and showed no scar tissue. The second pattern appeared later and was characterized by the appearance of scar tissue with adhesion to the femoral wall. The third pattern was characterized by adhesion of the ACL remnant to the posterior cruciate ligament. The histological changes of the first morphological pattern showed abundance of blood vessels and lymphocytes at the torn femoral end with few irregular collagen fibers. The second and third tear patterns showed decrement in the number of blood vessels and lymphocytes with longitudinally oriented collagen fibers.

Conclusions: The morphological features of the ACL remnant in the first 3 months after injury showed no scar tissue and its histological features had the characteristics of a reparative phase. This phase was followed by a prolonged remodeling phase that ended with attachment of the remnant to the posterior cruciate ligament.

Background: Guidelines recommend testing for multiple biomarkers in non-small cell lung cancer (NSCLC) tumors. Blood-based liquid biopsy analyzing cell-free DNA (cfDNA) could be used in addition to tumor biopsy genotyping, especially if tissue/time are limiting.

Objectives: To investigate the clinical utility of early cfDNA analysis (Guardant360^® CDx) in treatment-naïve NSCLC patients.

Methods: A prospective cohort of treatment-naïve patients with metastatic NSCLC who underwent tumor and cfDNA analysis between 12/2018 and 2/2019 were included.

Results: Ten patients were included: 6 males, median age 70.5 years (range 48–87), 8 prior smokers. Liquid biopsy was sent when cancer cells were detected in the biopsy specimen. Median time from diagnosis to receiving the report on the last biomarker from the tumor biopsy was 20 days (range 9–34); median time from blood draw to receiving the cfDNA findings was 9 days (range 7–12). The median difference between the cfDNA and the tumor analysis reports was 20 days (range 9–28). Actionable biomarkers were identified in four patients by both the biopsy analysis and the cfDNA analysis (2cases with EGFR mutations, one with ROS1 fusion, and one with EML4-ALK fusion for whom the biopsy analysis also identified an EGFR mutation not detected in the cfDNA analysis). Overall, eight patients received treatment (2 died before treatment initiation). Three patients received biomarker-based treatment (1 osimertinib, 1 alectinib, and 1 crizotinib).

Conclusions: These findings suggest that cfDNA analysis should be ordered by the pulmonologists early in the evaluation of patients with NSCLC, which might complement the tumor biopsy.

Background: In 2006, the International Society for Heart and Lung Transplantation amended the guidelines for the upper age limit of heart transplantation (HTx) from 55 years to 70 years and older for carefully selected patients. However, the relation of age to outcomes following of HTx has not been well studied.

Objectives: To investigate the impact of recipient age on the occurrence of rejections, vasculopathy, and mortality after HTx.

Methods: Study population comprised all consecutive 291 patients who underwent HTx between 1991–2016 and were followed at our center. Patients were categorized by age tertiles: < 46 years (mean 31.4 ± 11.7, range 16–45, n=90), 46–57 years (mean 51.4 ± 3.2, range 46–56, n=92), and ≥ 57 years (mean 61.6 ± 3.4, range 57–73, n=109).

Results: Patients aged ≥ 57 years were more often males and had more pre-HTx co-morbidities including hypertension, diabetes, dyslipidemia, and history of smoking (P < 0.05) compared to the younger age groups. Kaplan-Meier analysis by age tertiles showed the rates of major rejections and vasculopathy at 15 years were similar among the three age groups. Mortality rates at 15 years were directly related to the age groups (39%, 52%, 62% log-rank, P = 0.01). However, the association between age and mortality was no longer statistically significant after multivariate analysis (hazard ratio 1.01, 95% confidence interval 1.00–1.03).

Conclusions: In a contemporary cohort of patients undergoing HTx, recipient age does not significantly impact the risk of major rejections, vasculopathy, and long-term mortality.

Background: Social distancing, implemented to decrease the spread of coronavirus disease-2019 (COVID-19), forced major changes in medical practices, including an abrupt transition from face-to-face to remote patient care. Pre-clinical medical studies were concomitantly switched to electronic distance learning.

Objectives: To explore potential implications of COVID-19 on future pre-clinical medical studies.

Methods: We examined responses of pre-clinical medical students to the remote electronic learning in terms of quality of and satisfaction with teaching and technical support, attendance to classes, and the desire to continue electronic learning in the post-epidemic era. A survey of responses from first-year students at the Adelson School of Medicine was conducted. To optimize the reliability of the survey, a single research assistant conducted telephone interviews with each student, using a structured questionnaire concerning aspects of participation and satisfaction with teaching and with technical components of the remote electronic learning.

Results: With 100% response rate, the students reported high satisfaction with the electronic learning regarding its quality, online interactions, instructions given, technical assistance, and availability of recording for future studies. Most of the students (68.6%) noted a preference to continue < 90% of the learning online in the post-outbreak era. A high level of overall satisfaction and a low rate of technical problems during electronic learning were significantly correlated with the desire to continue online learning (P < 0.01).

Conclusions: The high satisfaction and the positive experience with the electronic distance learning imposed by the COVID-19 epidemic implied a successful transition and might induce future changes in pre-clinical medical studies.