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"Marmor, David"
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Optimal antiplatelet therapy in patients with acute coronary syndrome and chronic kidney disease: for the Jerusalem platelets thrombosis and intervention in cardiology (JUPITER-11) study group
by
Louay, Taha
,
Ovdat, Tal
,
Lupu, Lior
in
Acute coronary syndrome
,
Acute Coronary Syndrome - complications
,
Acute Coronary Syndrome - drug therapy
2025
Introduction
Chronic kidney disease (CKD) is a well-documented risk factor for major adverse cardiac events and bleeding events. The optimal antiplatelet strategy for patients with CKD remains unclear, especially patients with glomerular filtration rate (GFR) < 30 ml/min. We aim to compare clinical outcomes of patients with acute coronary syndrome (ACS) and CKD treated with ticagrelor or prasugrel vs. clopidogrel.
Methods
Patients were collected from the acute coronary syndrome Israeli survey (ACSIS). Patients were divided into 2 groups: ST-segment myocardial infarction (STEMI) and non-STEMI. Each group was further divided based on the GFR value (<30 ml/min or ≥ 30 ml/min). Mortality, bleeding, repeat revascularization, and re-hospitalization at 30-day and 1-year were evaluated.
Results
A total of 5,442 patients were included in the final analysis. There were no significant differences regarding baseline characteristics between both groups of ACS patients. In patients with STEMI and GFR < 30 ml/min, re-hospitalization (32% vs. 29 % p = 1.0), bleeding (2.7% vs 2.3% p = 0.9), and death rates (8.1 % vs 2.3% p = 0.5) did not differ between the two different treatment strategies at 30-day follow-up. The mortality rate in 1-year was lower among STEMI patients treated with the ticagrelor or prasugrel as compared with clopidogrel (33% vs 11% p = 0.04).
Conclusion
In patients with ACS and CKD, rehospitalization, bleeding and mortality rates were similar in30 days in patients treated with ticagrelor/prasugrel versus clopidogrel. Nevertheless, in patients presenting with STEMI and GFR < 30 ml/min, treatment with ticagrelor/prasugrel was correlated with a lower 1-year mortality rate as compared with clopidogrel treatment with no increase in bleeding rates.
Journal Article
Out of hospital cardiac arrest - new insights and a call for a worldwide registry and guidelines
by
Perel, Nimrod
,
Zacks, Netanel
,
Tabi, Meir
in
Acute coronary syndrome
,
Acute coronary syndromes
,
Aged
2024
Introduction
Out of hospital cardiac arrest (OHCA) is a major public health problem with substantial mortality rates worldwide. Genetic diseases and primary electrical disorders are the most common etiologies at younger ages, while ischemic heart disease and cardiomyopathies are common causes at older ages. Despite improvement in prevention and treatment in recent years, OHCA is still a major cause of cardiovascular death.
Method
We report prospective data regarding etiology, characteristics, clinical course, and outcomes of patients with OHCA who were admitted to a tertiary care center intensive cardiac care unit (ICCU) between 2020–2023.
Results
A total of 92 patients admitted after OHCA were included in the cohort. Mean age was 63.8 ± 13.8 years and 75 (82%) were males. The most common etiology of OHCA was acute coronary syndrome (ACS) in 54 (59%) patients, of whom 46 (85%) patients had ST elevation myocardial infarction and 8 (15%) had non-ST elevation myocardial infarction. During hospitalization, 42 (46%) patients underwent targeted temperature management and 13 (14%) received mechanical circulatory support. Interestingly, 77 (84%) patients underwent coronary angiography, while only 51 (55%) received percutaneous coronary intervention (PCI). Neurologic status was favorable in 49 (53%) patients with Cerebral Performance Category score of 1–2. Overall, mortality rates were relatively low, with 15 (16%) in-hospital deaths and 24 (26%) deaths at 30-day follow-up.
Conclusion
Although ACS was the most common etiology for OHCA, only 55% of patients underwent PCI. Most OHCA patients admitted to the ICCU survived hospitalization and were discharged. Increased awareness, public education, worldwide registries, and specific evidence-based guidelines for the treatment of OHCA patients may lead to improved outcomes for these patients who often carry poor prognoses.
Journal Article
Immature Platelet Fraction and Clinical Outcomes in Patients Undergoing Transcatheter Aortic Valve Implantation
2024
Introduction
Immature platelets or reticulated platelets are newly released thrombocytes. They can be identified by their large size and high RNA cytoplasm concentration. Immature platelet fraction (IPF) represents the percentage of immature circulative platelets relative to the total number of platelets. The role of IPF in patients undergoing transcatheter aortic valve implantation (TAVI) is unknown. The aim of the current trial was to assess the levels of IPF in patients undergoing TAVI and correlation with clinical outcomes.
Material and Methods
Immature platelet fraction levels were measured 3 times in all patients (preprocedure, 1-2 days post-procedure and 1-month post-procedure). Immature platelet fraction measurement was carried out using an autoanalyzer (Sysmex XE-2100). Patients were followed for 12 months. Primary outcomes were defined as complications during hospitalizations, rehospitalization, and mortality.
Results
Fifty-one patients were included in the study. Mean age was 79.8 (±9.6), and 28 (55%) were women. Twenty-one patients (41%) had complications: Of them, 6 of 21 (29%) occurred during hospitalizations (2—vascular complications; 2—sepsis, 2—implantation of a pacemaker), 9 of 21 (43%) patients were rehospitalized after the index admission, and 6 patients died during the follow-up period. Multivariate Cox regression analysis found that IPF < 7% in at least one of the 3 tests was associated with worse outcomes (hazard ratio 3.42; 95% CI 1.11-10.5, P = .032).
Conclusion
Immature platelet fraction >7% in patients undergoing TAVI is associated with worse outcomes. Further studies are needed to better understand this phenomenon.
Journal Article
Correlation between staging classification of aortic stenosis based on the extent of cardiac damage and platelet indices
2024
Background
Platelets play a key role in the natural history of aortic stenosis (AS) and after transcatheter aortic valve implantation (TAVI). An echo-based staging system stratifies patients with severe AS into 5 groups according to the associated cardiac damage phenotype. We aimed to correlate these AS stages with platelet indices in post-TAVI patients.
Methods
Patients with severe AS who underwent TAVI and were admitted to intensive cardiac care unit (ICCU) were prospectively identified and divided into 5 groups according to extra-valvular cardiac damage [no extravalvular cardiac damage (Stage 0), left ventricular damage (Stage 1), left atrial or mitral valve damage (Stage 2), pulmonary vasculature or tricuspid valve damage (Stage 3), or right ventricular damage (Stage 4)]. Baseline characteristics and complete blood count including mean platelet volume (MPV) and immature platelet fraction (IPF) were collected within 2 h after the procedure and analyzed in relation to aortic stenosis staging.
Results
A total of 220 patients were included. The mean age was 81 years old and 112 (50.9%) were female. Two (1%) patients were classified in stage 0; 34 (15%) in stage 1; 48 (22%) in stage 2; 49 (22%) in stage 3 and 87 (40%) in stage 4. Higher mean MPV values were correlated with higher AS staging (10.8 fL, 11 fL, 11.3 fL and 10.8 fL in stages 1, 2, 3 and 4, respectively,
P
= 0.02) as well as lower hemoglobin values (12 mg/dl, 11.6 mg/dl, 11 mg/dl and 11.3 mg/dl in stages 1, 2, 3 and 4, respectively
P
= 0.04). Mean IPF values were 5.3%, 5.58%, 5.57% and 4.83% in stage 1, 2, 3 and 4, respectively (
P
= 0.4). In a multivariate logistic regression model only MPV (OR = 2.6,
P
= 0.03) and body mass index (BMI) (OR = 1.17,
P
= 0.004) were correlated with higher staging (0–3) of AS.
Conclusions
Although IPF and MPV levels increased in stages 0–3, there was a decrease in indices in stage 4, (probably due to bone marrow dysfunction) in this end-stage population. Higher levels of MPV and lower levels of hemoglobin were independently correlated with higher stages (0–3) of AS.
Journal Article
Nonagenarians admission and prognosis in a tertiary center intensive coronary care unit – a prospective study
by
Jafari, Jamal
,
Perel, Nimrod
,
Braver, Omri
in
Acute coronary syndrome
,
Acute Coronary Syndrome - diagnosis
,
Acute Coronary Syndrome - epidemiology
2023
Background
With increasing life expectancy, the prevalence of nonagenarians with cardiovascular disease is steadily growing. However, this population is underrepresented in randomized trials and thus poorly defined, with little quality evidence to support and guide optimal management. The aim of the present study was to evaluate the clinical management, therapeutic approach, and outcomes of nonagenarians admitted to a tertiary care center intensive coronary care unit (ICCU).
Methods
We prospectively collected all patients admitted to a tertiary care center ICCU between July 2019 – July 2022 and compared nonagenarians to all other patients. The primary outcome was in-hospital mortality.
Results
A total of 3807 patients were included in the study. Of them 178 (4.7%) were nonagenarians and 93 (52%) females. Each year the prevalence of nonagenarians has increased from 4.0% to 2019, to 4.2% in 2020, 4.6% in 2021 and 5.3% in 2022. Admission causes differed between groups, including a lower rate of acute coronary syndromes (27% vs. 48.6%, p < 0.001) and a higher rate of septic shock (4.5% vs. 1.2%, p < 0.001) in nonagenarians. Nonagenarians had more comorbidities, such as hypertension, renal failure, and atrial fibrillation (82% vs. 59.6%, 23% vs. 12.9%, 30.3% vs. 14.4% p < 0.001, respectively). Coronary intervention was the main treatment approach, although an invasive strategy was less frequent in nonagenarians in comparison to younger subjects. In-hospital mortality rate was 2-fold higher in the nonagenarians (5.6% vs. 2.5%, p = 0.025).
Conclusion
With increasing life expectancy, the prevalence of nonagenarians in ICCU’s is expected to increase. Although nonagenarian patients had more comorbidities and higher in-hospital mortality, they generally have good outcomes after admission to the ICCU. Hence, further studies to create evidence-based practices and to support and guide optimal management in these patients are warranted.
Journal Article
Urgent transcatheter edge-to-edge repair for severe mitral regurgitation with flail leaflet in critically Ill patients
by
Hitter, Rafael
,
Asher, Elad
,
Harari, Emanuel
in
acute mitral regurgitation
,
acute TEER
,
Body mass index
2023
Degenerative mitral valve disease (DMR) is a common valvular disorder, with flail leaflets due to ruptured chordae representing an extreme variation of this pathology. Ruptured chordae can present as acute heart failure which requires urgent intervention. While mitral valve surgery is the preferred mode of intervention, many patients have significantly elevated surgical risk and are sometimes considered inoperable. We aim to characterize patients with ruptured chordae undergoing urgent transcatheter edge-to-edge repair (TEER), and to analyze their clinical and echocardiographic outcomes.
We screened all patients who underwent TEER at a tertiary referral center in Israel. We included patients with DMR with flail leaflet due to ruptured chordae and categorized them into elective and critically ill groups. We evaluated the echocardiographic, hemodynamic, and clinical outcomes of these patients.
The cohort included 49 patients with DMR due to ruptured chordae and flail leaflet, who underwent TEER. Seventeen patients (35%) underwent urgent intervention and 32 patients (65%) underwent an elective procedure. In the urgent group, the average age of the patient was 80.3, with 41.8% being female. Fourteen patients (82%) received noninvasive ventilation, and three patients (18%) required invasive mechanical ventilation. One patient died due to tamponade, while echo evaluation of the other 16 patients demonstrated successful reduction of ≥2 in the MR grade. Left atrial V wave decreased from 41.6 mmHg to 17.9 mmHg (
< 0.001), and the pulmonic vein flow pattern changed from reversal (68.8%) to a systolic dominant flow in all patients (
= 0.001). After the procedure, 78.5% of patients improved to New York Heart Association (NYHA) class I or II (
< 0.001). There was no significant difference in the overall mortality between the urgent and elective groups, with similar 6 months survival rates for each group.
Urgent TEER in patients with ruptured chordae and flail leaflets can be safe and feasible with favorable hemodynamic, echocardiographic, and clinical outcomes.
Journal Article
Artificial intelligence based prediction model of in-hospital mortality among females with acute coronary syndrome: for the Jerusalem Platelets Thrombosis and Intervention in Cardiology (JUPITER-12) Study Group
by
Maller, Tommer
,
Perel, Nimrod
,
Shrem, Maayan
in
Acute coronary syndromes
,
Artificial intelligence
,
Cardiovascular Medicine
2024
Despite ongoing efforts to minimize sex bias in diagnosis and treatment of acute coronary syndrome (ACS), data still shows outcomes differences between sexes including higher risk of all-cause mortality rate among females. Hence, the aim of the current study was to examine sex differences in ACS in-hospital mortality, and to implement artificial intelligence (AI) models for prediction of in-hospital mortality among females with ACS.
All ACS patients admitted to a tertiary care center intensive cardiac care unit (ICCU) between July 2019 and July 2023 were prospectively enrolled. The primary outcome was in-hospital mortality. Three prediction algorithms, including gradient boosting classifier (GBC) random forest classifier (RFC), and logistic regression (LR) were used to develop and validate prediction models for in-hospital mortality among females with ACS, using only available features at presentation.
A total of 2,346 ACS patients with a median age of 64 (IQR: 56-74) were included. Of them, 453 (19.3%) were female. Female patients had higher prevalence of NSTEMI (49.2% vs. 39.8%,
< 0.001), less urgent PCI (<2 h) rates (40.2% vs. 50.6%,
< 0.001), and more complications during admission (17.7% vs. 12.3%,
= 0.01). In-hospital mortality occurred in 58 (2.5%) patients [21/453 (5%) females vs. 37/1,893 (2%) males, HR = 2.28, 95% CI: 1.33-3.91,
= 0.003]. GBC algorithm outscored the RFC and LR models, with area under receiver operating characteristic curve (AUROC) of 0.91 with proposed working point of 83.3% sensitivity and 82.4% specificity, and area under precision recall curve (AUPRC) of 0.92. Analysis of feature importance indicated that older age, STEMI, and inflammatory markers were the most important contributing variables.
Mortality and complications rates among females with ACS are significantly higher than in males. Machine learning algorithms for prediction of ACS outcomes among females can be used to help mitigate sex bias.
Journal Article
Predictive Modeling for Baseball Pitch Success Rate
by
Marmor, David
in
Statistics
2021
In recent years Major League Baseball (MLB) teams have increasingly used analytics to guide player evaluations, acquisitions, and development. One major advancement in the last decade is the MLB Statcast technology. Statcast trackers in every major league stadium record detailed information about every pitch and batted ball that occurs during MLB games. The data is available to the public at https://baseballsavant.mlb.com/. It contains information from every MLB game in the past 6 seasons.Each row in the dataset is one MLB pitch. All data from 2018-2020 will be used to study the 3 most commonly thrown pitches, the 4-seam fastball, the slider, and the change-up. For each pitch the dataset has 89 variables. The dataset was divided into three different data frames, one for each pitch type. The fastball data frame has 522,389 observations, the slider data frame has 283,285 observations, and the change up data frame has 190,040 observations.Success will be defined as either getting a strike or a weak contact. Failure will be defined as a ball or strong contact. Predictors will include pitch velocity, spin, horizontal and vertical movement, pitch location, and the count (number of balls and strikes). For each pitch binary classifiers will be built to predict success.Potential imbalance problem in the outcome variable will be explored and addressed. Models such as logistic regression, random forests, and gradient boosting will be built and compared for each pitch type. Permutation importance technique will be used to rank predictors’ importance. Specifically Gini variable importance will be used. The goal is to find an optimal binary classifier for each of the 3 thrown pitches, which can accurately predict pitch success as well as telling which features are the most important and how that varies across pitch type. The models will be evaluated by their overall prediction accuracy as well as their sensitivity, specificity, and precision.
Dissertation
Troponin level at presentation as a prognostic factor among patients presenting with non‐ST‐segment elevation myocardial infarction
by
Perel, Nimrod
,
Manassra, Mohammed
,
Karameh, Hani
in
Acute coronary syndromes
,
Biomarkers
,
Body mass index
2024
Background Timely reperfusion within 120 min is strongly recommended in patients presenting with non‐ST‐segment myocardial infarction (NSTEMI) with very high‐risk features. Evidence regarding the use of high‐sensitivity cardiac troponin (hs‐cTn) concentration upon admission for the risk‐stratification of patients presenting with NSTEMI to expedite percutaneous coronary intervention (PCI) and thus potentially improve outcomes is limited. Methods All patients admitted to a tertiary care center ICCU between July 2019 and July 2022 were included. Hs‐cTnI levels on presentaion were recorded, dividing patients into quartiles based on baseline hs‐cTnI. Association between initial hs‐cTnI and all‐cause mortality during up to 3 years of follow‐up was studied. Results A total of 544 NSTEMI patients with a median age of 67 were included. Hs‐cTnI levels in each quartile were: (a) ≤122, (b) 123–680, (c) 681–2877, and (d) ≥2878 ng/L. There was no difference between the initial hs‐cTnI level groups regarding age and comorbidities. A higher mortality rate was observed in the highest hs‐cTnI quartile as compared with the lowest hs‐cTnI quartile (16.2% vs. 7.35%, p = .03) with hazard ratio (HR) for mortality of 2.6 (95% confidence interval [CI]: 1.23–5.4; p = .012) in the unadjusted model, and HR of 2.06 (95% CI: 1.01–4.79; p = .047) with adjustment for age, gender, serum creatinine, and significant comorbidities. Conclusions Patients with NSTEMI and higher hs‐cTnI levels upon admission faced elevated mortality risk. This underscores the need for further prospective investigations into early reperfusion strategies' impact on NSTEMI patients' mortality, based on admission troponin elevation. In a study of 544 NSTEMI patients (mean age: 68; 22% females), we explored hs‐cTnI levels on admission as a prognostic marker. The highest hs‐cTnI quartile showed increased mortality (16.2% vs. 7.3%). Adjusted HR for mortality was 2.06 (p = .047). Further prospective studies are essential to assess reperfusion strategies based on initial troponin levels.
Journal Article