Publications by authors named "Ahmad Alkhalil"

Coronary artery obstruction caused by sinus sequestration is well described after transcatheter aortic valve implantation in failed bioprosthetic valves, which usually occurs during or shortly after the transcatheter aortic valve implantation procedure. We report the presentation, management, and outcomes of 2 cases of very late sinus sequestration in native aortic annuli, which has not been described before to our knowledge. ().

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Tele-training in surgical education has not been effectively implemented. There is a stringent need for a high transmission rate, reliability, throughput, and reduced distortion for high-quality video transmission in the real-time network. This work aims to propose a system that improves video quality during real-time surgical tele-training.

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Atypical presentations of ST-segment-elevation myocardial infarction (STEMI) have been reported in patients who have COVID-19. We have seen this occurrence in our center in Bronx, New York, where multitudes of patients sought treatment for the coronavirus. We studied the prevalence of atypical STEMI findings among patients with COVID-19 who presented during the first 2 months of the pandemic.

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Pericardial decompression syndrome, defined as paradoxical hypotension and pulmonary edema after pericardiocentesis, is a rare complication of pericardiocentesis. Stress cardiomyopathy, caused by excess catecholamine response resulting in left ventricular dysfunction and elevated cardiac enzymes, can overlap with pericardial decompression syndrome, and both might belong to the same spectrum of disease. ().

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Acute circulatory collapse may rarely occur during transcatheter aortic valve implantation (TAVI). In such cases, immediate mechanical circulatory support (MCS) as a bridge to remedial interventions may be required. To define the rate of MCS utilization in TAVI patients and identify the predictors of MCS utilization in a cohort of TAVI patients.

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Background: Thrombocytopenia after transcatheter aortic valve replacement (TAVR) is associated with adverse clinical outcomes. Whether preprocedural P2Y inhibition prevents postprocedural thrombocytopenia is uncertain.

Methods: This retrospective analysis identified consecutive patients (n = 266) undergoing TAVR between November 2016 and July 2017.

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Background: Fractional flow reserve derived from computed tomography (FFRct) has shown higher accuracy for detection of significant coronary artery disease (CAD) compared to coronary computed tomography angiography (CCTA). The performance of a combined comprehensive qualitative interpretation of both CCTA and FFRct in patient management is unknown. We aimed to explore the clinical application of this combined approach.

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Background: Transcatheter aortic valve replacement (TAVR) is an alternative to surgical aortic valve replacement (SAVR) for patients with severe symptomatic aortic stenosis (AS) who are at intermediate and high risk for surgery. Commercial use of TAVR has expanded to patients with end stage renal disease (ESRD).

Objectives: Compare in-hospital outcomes of TAVR versus SAVR in ESRD patients requiring hemodialysis (HD).

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Objective: Determine the feasibility and predictors of early discharge after minimalist transcatheter aortic valve replacement (TAVR).

Background: Duration of hospitalization has a direct impact on overall cost of care, but the clinical impact of length of stay (LOS) in patients undergoing minimalist TAVR remains unclear.

Methods: We studied 268 patients who underwent minimalist TAVR.

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Background: The Parachute is a novel percutaneously implanted ventricular partitioning device (VPD) that has emerged as a safe and feasible treatment option for patients with heart failure following anterior wall myocardial infarction. VPD efficacy is likely dependent on optimal device placement, but to date there are no published data examining the effect of device positioning on patient outcomes.

Methods And Results: We retrospectively identified 32 patients successfully implanted with the Parachute device, all of whom underwent cardiac computed tomography (CCT) at baseline and after 6 months of follow-up.

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Purpose: Standardized measures of physical symptoms predict mortality and healthcare utilization, but clinicians remain uncertain about how to apply them in routine clinical care. Recognizing the tendency for physician documentations to routinely underestimate symptom burden, we assessed whether or not severity was an important dimension of symptom assessments that may determine their usefulness in clinical encounters.

Methods: Retrospective cohort study using data from audio computer-assisted self-interviews augmented by chart review of patients from a primary care clinic of an urban health system.

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Some centers, mostly in Europe, have demonstrated the feasibility of a minimally invasive strategy (MIS; i.e., local anesthesia and conscious sedation, performed in the cath laboratory without transesophageal echocardiography guidance).

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