Publications by authors named "Ghaleb Khirfan"

Background: Elevated intrathoracic pressure could affect pulmonary vascular pressure measurements and influence pulmonary hypertension (PH) diagnosis and classification. Esophageal pressure (P) measurement adjusts for the increase in intrathoracic pressure, better reflecting the pulmonary hemodynamics in patients with obesity.

Research Question: In individuals with obesity, what is the impact of adjusting pulmonary hemodynamic determinations for P on PH diagnosis and classification? Can P be estimated by positional or respiratory hemodynamic changes?

Study Design And Methods: In this prospective cohort study, we included patients with obesity who underwent right heart catheterization and demonstrated elevated pulmonary artery wedge pressure (PAWP; ≥ 12 mm Hg).

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Recent studies have shown low high-density lipoprotein cholesterol (HDL-C) and dysregulated lipid metabolism in chronic thromboembolic pulmonary hypertension (CTEPH). Apolipoprotein A-I (ApoA-I) is the major protein component of HDL-C and mediates most of its functions. We hypothesize that ApoA-1 and its oxidative state might be more sensitive biomarkers in CTEPH.

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Background: In contrast to pulmonary vascular resistance (PVR), PVR index (PVRI) accounts for variations in body habitus. We tested the association of PVRI compared to PVR with clinical outcomes in lean and obese (BMI ≥30 kg/m) patients with pulmonary arterial hypertension (PAH).

Methods: This retrospective study included adult patients with PAH who underwent right heart catheterization at Cleveland Clinic between February 1992 and November 2019.

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Background: European Society of Cardiology (ESC) and European Respiratory Society (ERS) guidelines include thermodilution cardiac index (TDCI) and mixed venous oxygen saturation (SvO) as two of the three hemodynamic determinations used in risk assessment of patients with pulmonary arterial hypertension (PAH). SvO may be a better measurement than TDCI to assess prognosis in patients with either idiopathic or heritable PAH.

Research Question: What is the concordance between TDCI and SvO ESC/ERS risk group allocation and their prognostic value in patients with PAH?

Study Design And Methods: In this retrospective study, we assessed the correlation between SvO and TDCI in patients with idiopathic and heritable PAH.

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Introduction: Little is known on the pulmonary gradients of oxyhemoglobin, carboxyhemoglobin and methemoglobin in pulmonary arterial hypertension (PAH). We sought to determine these gradients in group 1 PAH and assess their association with disease severity and survival.

Methods: During right heart catheterization (RHC) we obtained blood from pulmonary artery (PA) and pulmonary artery wedge (PAW) positions and used co-oximetry to test their gasometric differences.

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Pulmonary arterial hypertension (PAH) is a condition characterised by increased pulmonary vascular resistance which can lead to right heart failure and premature death. It imposes a significant burden on patients' lives, affecting their physical, emotional and social wellbeing. Pharmacological therapies are the mainstay of treatment; while they are not curative, they can alleviate patient suffering, improve quality of life and delay disease progression.

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Background: High Density Lipoprotein Cholesterol (HDL-C) has various anti-inflammatory, anti-atherogenic, anti-oxidant and anti-coagulant properties that improve vascular function. The utility of HDL-C as a biomarker of severity and predictor of survival was described in patients with pulmonary arterial hypertension (PAH). No prior study has assessed the utility of HDL-C in patients with Chronic Thromboembolic Pulmonary Hypertension (CTEPH).

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Background: Serum chloride is an important homeostatic biomarker in left heart failure, with significant prognostic implications. The impact of serum chloride in the long-term survival of patients with pulmonary arterial hypertension (PAH) is unknown. We tested whether serum chloride levels are associated with long-term survival in patients with PAH.

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Background: The prevalence and prognostic implications of hypoxemia either at rest or during six-minute walk test (6MWT) in patients with idiopathic or heritable pulmonary arterial hypertension (IPAH or HPAH) have not been systemically studied.

Objectives: We sought to determine the prevalence, phenotypic and prognostic implications of hypoxemia in patients with IPAH and HPAH.

Methods: Patients with IPAH or HPAH were identified from the Cleveland Clinic Pulmonary Hypertension Registry.

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Management of pulmonary hypertension (PH) has remained an unmet need in advanced left heart failure with reduced ejection fraction. In fact, patients are frequently denied heart transplant due to untreated pulmonary hypertension. The availability of mechanically circulatory devices and PH therapies has provided a ray of hope.

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Background: Prevalence of symptoms experienced by patients with cancer was studied in different parts of the world. In Jordan, to the best of our knowledge, there is no published data on the prevalence of symptoms among patients with cancer. The aim of this study is to estimate the prevalence of symptoms among patients with cancer in Jordan.

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Venous thromboembolism (VTE) is a commonly encountered problem in patients with cancer. In recent years, cancer treatment paradigm has shifted with most therapy offered in ambulatory outpatient settings. Excess of half VTEs in patients with cancer occur in outpatient settings without prior hospitalization, where current practice guidelines do not recommend routine prophylaxis.

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Purpose: Health related quality of life (HRQOL) is an important outcome in cancer care and needs assessment by a valid questionnaire. HRQOL questionnaires need to be validated after translations to other languages and cultural settings. The purpose of this study is to evaluate the psychometric properties of the Arabic version of the European Organization for Research and Treatment of Cancer Quality of Life 15 items Questionnaire for Palliative Care (EORTC QLQ-C15-PAL).

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