Publications by authors named "Ayman A Mohammed"

Article Synopsis
  • The study looked at the FIB-4 index, which helps doctors see how bad liver disease might be in people with heart issues, specifically hypertrophic cardiomyopathy (HCM).
  • Researchers divided 187 HCM patients into two groups based on their FIB-4 scores to see how many had serious heart problems or died over time.
  • They found that patients with higher FIB-4 scores (2.37 or more) had more heart issues and a greater chance of dying from heart problems compared to those with lower scores.
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  • - The study explores the relationship between the triglyceride-glucose (TyG) index, a measure of insulin resistance, and myocardial ischemia in patients with ischemia and no obstructive coronary artery disease (INOCA), finding that a higher TyG index correlates with an increased occurrence of abnormal myocardial perfusion imaging (MPI).
  • - Out of 332 INOCA patients, 34% demonstrated abnormal MPI, and those in the highest TyG index group exhibited the highest rates of ischemia and major adverse cardiac events (MACE) during a follow-up period of approximately 35 months.
  • - The findings suggest that the TyG index could serve as a predictor for poor outcomes in INOCA patients, with higher
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Background: Coronary microvascular dysfunction (CMD) is frequently observed in atrial fibrillation (AF), the most commonly sustained arrhythmia. Nevertheless, an in-depth prognostic significance of CMD in AF is lacking. We aimed to provide insight into the predictive impact of CMD assessed by a novel non-invasive coronary angiography-derived index of microcirculatory resistance (caIMR) for major adverse events (MACE) in AF patients.

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Background: The atherogenic index of plasma (AIP) is linked to lipid metabolism and has shown considerable prognostic value in cardiovascular disorders. However, its role in myocardial infarction with non-obstructive coronary arteries (MINOCA) has not been investigated. We assessed the relationship between AIP, the severity of coronary stenosis, and prognosis in MINOCA.

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Background: Recent studies highlighted that stress hyperglycemia ratio (SHR) is a potential predictor for future risk in heart failure (HF) patients. However, its implications specifically in HF with preserved ejection fraction (HFpEF) are not yet fully elucidated. We aimed to investigate the association between SHR and long-term clinical outcomes in HFpEF patients.

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Background: Patients with aortic valve stenosis have been postulated to have coronary microvascular dysfunction (CMD) contributing to the clinical symptoms and adverse outcomes. The coronary angiography (CAG)-derived index of microcirculatory resistance (caIMR) is proposed as a novel, less invasive and pressure-wire-free index to assess CMD. This study aimed to quantify CMD assessed by caIMR and investigate its prognostic impact in patients with aortic valve stenosis.

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In the past decade, scientific and clinical research has provided a translational perspective on myocardial infarction (MI) with non-obstructive coronary arteries (MINOCA). MINOCA is characterized by clinical documentation of an acute MI but angiography shows no significant coronary artery obstruction (stenosis <50%). The prevalence of MINOCA is estimated to range from approximately 6 to 10% among MI patients, and those with this condition have a poor prognosis, experiencing high rates of mortality, rehospitalization, and socioeconomic burden.

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Background: Coronary microvascular dysfunction (CMD) is a strong determinant of prognosis in patients with chronic coronary syndrome (CCS). The triglyceride-glucose index (TyG index), an alternative method to evaluate insulin resistance, is positively correlated with the incidence and adverse outcomes of cardiovascular diseases. However, the relationship between the TyG index and the presence and prognosis of CMD in CCS patients has not been investigated.

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Background: Stress hyperglycemia ratio (SHR) is a novel biomarker of true acute hyperglycemia condition and is associated with a worse prognosis in patients with myocardial infarction (MI). However, the effects of SHR in the setting of MI with non-obstructive coronary arteries (MINOCA) have not been investigated. This study aimed to explore the association between SHR and long-term clinical outcomes among MINOCA patients.

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Aldosterone has hypertrophic and profibrotic effects on the heart. This study aims to determine the relationship between serum aldosterone concentration (SAC) and aldosterone-to-renin ratio (ARR) with left ventricular (LV) geometry and diastolic function in essential hypertension (EH). We investigated 213 EH patients (50.

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Article Synopsis
  • * A study of 151 INOCA patients found that CMD was more common in those with no stenosis (0% blockage) compared to those with non-obstructive stenosis (less than 50% blockage), and both groups showed similar rates of major adverse cardiovascular events (MACE) over time.
  • * Despite similar long-term outcomes, CMD and abnormal myocardial perfusion imaging (MPI) were identified as key predictors of poor health outcomes, especially for INOCA patients with no stenosis.
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Background: Coronary slow flow (CSF) is common and linked to worse cardiovascular events and life-threatening arrhythmias. However, the clinical implication of CSF among myocardial infarction with the non-obstructive coronary artery (MINOCA) has never been studied. We aimed to evaluate the impact of CSF on the MINOCA population.

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Article Synopsis
  • Coronary microvascular dysfunction (CMD) is prevalent in patients with diabetes and linked to worse cardiovascular outcomes, prompting the use of the caIMR method to measure CMD effectively without invasive procedures.
  • In a study involving 290 patients, it was found that a higher proportion of diabetic patients had CMD compared to non-diabetic patients and that a significant number experienced major adverse cardiac events (MACE) during follow-up.
  • Results indicated that diabetic patients with CMD (caIMR ≥ 25) were at greater risk for MACE, highlighting the need for targeted treatments for this higher-risk group.
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Objective: Coronary microvascular dysfunction (CMD) may associate with adverse cardiovascular events in obese patients. Coronary angiography-derived index of microcirculatory resistance (caIMR) is proposed as a less-invasive and pressure-wire-free index to assess CMD. We aimed to investigate the impact of coronary microvascular function assessed by caIMR in patients with overweight and chronic coronary syndrome (CCS).

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Background: White blood cell count to mean platelet volume ratio (WMR) and neutrophil-to-platelet ratio (NPR) have been demonstrated as prognostic inflammatory biomarkers of the acute coronary syndrome. We aimed to evaluate the prognostic value of WMR and NPR among myocardial infarction with nonobstructive coronary arteries (MINOCA) patients.

Method: A total of 274 MINOCA patients were enrolled.

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Background: A significant proportion of ischemia with non-obstructive coronary artery disease (INOCA) demonstrate coronary microvascular dysfunction (CMD), a condition associated with abnormal myocardial perfusion imaging (MPI) and adverse outcomes. Coronary angiography-derived index of microvascular resistance (caIMR) is a novel non-invasive technique to assess CMD. We aimed to investigate the prognostic value of combined caIMR and MPI by CZT SPECT in INOCA patients.

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Background And Aims: Metabolic syndrome (MeS) is recognized as a significant predictor of poor outcomes in coronary artery disease. However, its prognostic implications in myocardial infarction with non-obstructive coronary arteries (MINOCA) have not been examined. We aimed at investigating the role of MeS on the clinical outcomes in MINOCA patients.

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Background: Deaths by exsanguination in trauma are preventable with hemorrhage control and resuscitation with allogeneic blood products (ABPs). The ideal transfusion ratio is unknown. We compared efficacy and safety of high transfusion ratios of FFP:RBC and PLT:RBC with low ratios in trauma.

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