Publications by authors named "Leroy E Rabbani"

A single high-sensitivity troponin-T (hs-TnT) measurement may be sufficient to risk-stratify emergency department (ED) patients with possible acute coronary syndrome (ACS) using the recalibrated History, Electrocardiogram, Age, Risk Factors, Troponin (rHEART) score. We sought to validate this approach in a multiethnic population of United States patients and investigate gender-specific differences in performance. We conducted a secondary analysis of a prospective cohort study of adult ED patients with possible ACS at a single, urban, academic hospital.

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  • The study examines outcomes of percutaneous coronary intervention (PCI) for de novo ostial right coronary artery (RCA) lesions, which have previously shown poor outcomes.
  • Researchers utilized intravascular ultrasound (IVUS) to categorize 170 identified RCA stenoses into three morphological types: isolated ostial lesions, ostial lesions with calcified nodules (CN), and ostial lesions with diffuse disease.
  • Results indicated that patients with CN had a significantly higher two-year target lesion failure (TLF) rate compared to those with diffuse disease, while isolated lesions resulted in no events, highlighting that lesion morphology is crucial for predicting clinical outcomes.
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  • Intravascular ultrasound studies reveal that about 25% of the left anterior descending (LAD) arteries have a myocardial bridge, which can affect stent performance.
  • This study aimed to explore the relationship between myocardial bridges and chronic total occlusions (CTOs) in LAD lesions, as well as their impact on clinical outcomes after treatment.
  • Results indicated that myocardial bridges were more frequent in LAD CTOs, and stents that extended into these bridges were linked to higher rates of target lesion failure compared to stents not extending into them.
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  • Many algorithms for evaluating acute coronary syndrome (ACS) in emergency departments depend on measuring changes in troponin levels over specific time intervals, which can be challenging in a busy setting.
  • A study involving 821 patients indicated that using a troponin "velocity" approach (the rate of change in troponin levels) may effectively predict major cardiac events within 30 days, even without strict timing for specimen collection.
  • The findings suggested that while the new velocity-based algorithm showed a decent negative predictive value, it performed comparably well when incorporated into existing European Society of Cardiology protocols using troponin measurements.
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  • The study investigates the causes of in-stent restenosis (ISR) in the right coronary artery (RCA), particularly focusing on mechanical and biological mechanisms.
  • Using intravascular ultrasound (IVUS), researchers classified ISR lesions and found that 50% were due to mechanical issues like stent fractures or deformations, while 53% were related to biological factors like neointimal hyperplasia.
  • The one-year target lesion failure rate was 11.5%, with significantly higher event rates (41.4%) for mechanically caused ISRs that were managed without new stents, highlighting the need for better treatment strategies.
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Acute coronary syndromes (ACS) remain one of the leading causes of cardiovascular morbidity and mortality in the United States and around the world. Because of the acute nature of ACS presentations, timely identification, risk stratification, and intervention are of the utmost importance. Twenty years ago, we published the first iteration of our institutional chest pain clinical pathway in this journal, which separated patients presenting with chest pain into one of the 4 levels of decreasing acuity, with associated actions and interventions for providers based on the level.

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Background: Although the presence of severe stenosis in the left main coronary artery (LMCA) is a well-established predictor of mortality, whether this extends to nonobstructive atherosclerosis in the LMCA is unknown.

Objectives: The aim of this study was to evaluate the association between LMCA disease by intravascular ultrasound (IVUS) and long-term mortality.

Methods: Between 2005 and 2013, 3,239 patients with LMCA IVUS imaging without LMCA revascularization (either before angiography or scheduled based on index angiography or IVUS) were included.

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Study Objective: To evaluate whether the introduction of a 1-hour high-sensitivity cardiac troponin-T (hs-TnT) pathway for patients who present to the emergency department (ED) with suspected acute coronary syndrome (ACS) improves ED patient flow without changing the rate of "missed" major adverse cardiac events (MACE), compared to use of conventional cardiac troponin with an associated 3-hour pathway.

Methods: This was a prospective, uncontrolled observational study conducted before and after implementation of a 1-hour hs-TnT pathway at a high-volume urban ED. Patients undergoing evaluation for ACS in the ED were enrolled during their initial visit and clinical outcomes were assessed at 30 and 90 days.

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Objectives: To describe hemodynamic efficacy and clinical outcomes of Impella percutaneous left ventricular assist device (pLVAD) in patients with cardiogenic shock (CS).

Background: Percutaneous LVADs are increasingly used in CS management. However, device-related outcomes and optimal utilization remain active areas of investigation.

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Purpose: To assess the potential clinical impact of an automated urine output (UOP) monitoring system in the intensive care unit.

Methods: Frequency of UOP documentation during a 20-month period was assessed in records of inpatients on the medicine floor, cardiac intensive care (CCU), and cardiothoracic-intensive care units (CTICU). Documentation timeliness (time between expected and observed UOP recording) was assessed over a 3-month period.

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Background: Despite growing evidence of cardiovascular complications associated with coronavirus disease 2019 (COVID-19), there are few data regarding the performance of transthoracic echocardiography (TTE) and the spectrum of echocardiographic findings in this disease.

Methods: A retrospective analysis was performed among adult patients admitted to a quaternary care center in New York City between March 1 and April 3, 2020. Patients were included if they underwent TTE during the hospitalization after a known positive diagnosis for COVID-19.

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Critical care cardiology has been impacted by the coronavirus disease-2019 (COVID-19) pandemic. COVID-19 causes severe acute respiratory distress syndrome, acute kidney injury, as well as several cardiovascular complications including myocarditis, venous thromboembolic disease, cardiogenic shock, and cardiac arrest. The cardiac intensive care unit is rapidly evolving as the need for critical care beds increases.

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Background: Nearly 30,000 patients with coronavirus disease-2019 (COVID-19) have been hospitalized in New York City as of April 14th, 2020. Data on the epidemiology, clinical course, and outcomes of critically ill patients with COVID-19 in this setting are needed.

Methods: We prospectively collected clinical, biomarker, and treatment data on critically ill adults with laboratory-confirmed-COVID-19 admitted to two hospitals in northern Manhattan between March 2nd and April 1st, 2020.

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The novel coronavirus disease 2019, otherwise known as COVID-19, is a global pandemic with primary respiratory manifestations in those who are symptomatic. It has spread to >187 countries with a rapidly growing number of affected patients. Underlying cardiovascular disease is associated with more severe manifestations of COVID-19 and higher rates of mortality.

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Background: Over 40 000 patients with COVID-19 have been hospitalised in New York City (NY, USA) as of April 28, 2020. Data on the epidemiology, clinical course, and outcomes of critically ill patients with COVID-19 in this setting are needed.

Methods: This prospective observational cohort study took place at two NewYork-Presbyterian hospitals affiliated with Columbia University Irving Medical Center in northern Manhattan.

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Novel coronavirus-19 disease (COVID-19) is an escalating, highly infectious global pandemic that is quickly overwhelming healthcare systems. This has implications on standard cardiac care for ST-elevation myocardial infarctions (STEMIs). In the setting of anticipated resource scarcity in the future, we are forced to reconsider fibrinolytic therapy in our management algorithms.

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Clinical pathways reinforce best practices and help healthcare institutions standardize care delivery. The NewYork-Presbyterian/Columbia University Irving Medical Center has used such a pathway for the management of patients with chest pain and acute coronary syndromes for almost 2 decades. A multidisciplinary panel of stakeholders serially updates the algorithm according to new data and recently published guidelines.

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Outcomes after percutaneous coronary interventions (PCI) in saphenous vein grafts (SVG) are inferior compared with native coronary arteries, but the mechanisms of SVG in-stent restenosis (ISR) have not been well-described. Thus, we aimed to evaluate the patterns of SVG ISR using intravascular ultrasound (IVUS) in 54 SVG ISR lesions. Stent underexpansion was defined as minimum stent area (MSA) <5 mm.

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Background: It is unknown whether postanoxic cortical and subcortical myoclonus are distinct entities with different prognoses.

Methods: In this retrospective cohort study of 604 adult survivors of cardiac arrest over 8.5 years, we identified 111 (18%) patients with myoclonus.

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Objective: To test the hypothesis that posttraumatic stress and depressive symptoms, not cognitive or functional impairment, are associated with cardiac arrest survivors' negative recovery perceptions at hospital discharge.

Methods: Prospective observational cohort of cardiac arrest patients admitted between 9/2015-5/2017. Survival to discharge with sufficient mental status to complete a psychosocial interview was the main inclusion criterion.

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Aim: To examine gender differences among cardiac arrest (CA) survivors' cognitive, functional, and psychiatric outcomes at discharge.

Methods: This is a prospective, observational cohort of 187 CA patients admitted to Columbia University Medical Center, considered for Targeted Temperature Management (TTM), and survived to hospital discharge between September 2015 and July 2017. Patients with sufficient mental status at hospital discharge to engage in the Repeatable Battery for Neuropsychological Status (RBANS), Modified Lawton Physical Self-Maintenance Scale (M-PSMS), Cerebral Performance Category Scale (CPC), Center for Epidemiological Studies Depression Scale (CES-D), and Post-Traumatic Stress Disorder Checklist - Civilian Version (PCL-C) were included.

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Background: Traditional predictors of neurological prognosis after cardiac arrest are unreliable after targeted temperature management. Absence of pupillary reflexes remains a reliable predictor of poor outcome. Diffusion-weighted imaging has emerged as a potential predictor of recovery, and here we compare imaging characteristics to pupillary exam.

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Clinical pathways can optimize care both across and within institutions, but regular updates to these pathways based on new clinical trials, professional guidelines, and Food and Drug Administration approvals are essential. Herein we describe the most recent revisions to the New York-Presbyterian Hospital (Columbia University Medical Center and Weill Cornell Medical Center) clinical pathway for acute coronary syndromes and chest pain, which incorporates novel data regarding the timing and administration of P2Y12 inhibition (including the intravenous P2Y12 inhibitor cangrelor) and the appropriateness of prolonged (>1 year) dual antiplatelet therapy for the secondary prevention of ischemic events.

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We sought to explore differences in distribution and morphology of coronary lesions comparing cardiac allograft vasculopathy and native coronary atherosclerosis (NCA) using intravascular imaging with optical coherence tomography (OCT). At the time of routine surveillance angiography, 17 heart transplant (HT) recipients with a history of high-grade cellular rejection (HGR) and 43 HT recipients with none/mild (low)-grade rejection underwent OCT imaging of the left anterior descending and were compared to 60 patients with NCA without HT. Compared with patients with NCA, patients with HGR had similar intima areas but smaller external elastic lamina areas (7.

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