Publications by authors named "Karen Krok"

: Contrast-enhanced ultrasound (CEUS) is a non-invasive imaging technique with similar accuracy to CT and MRI for the diagnosis of hepatocellular carcinoma (HCC). CEUS offers several advantages in patient populations who have contraindications for CT or MRI. There are limited prospective studies in the United States evaluating the diagnostic equivalence of CEUS following transcatheter arterial chemoembolization (TACE) with same-day CT/MRI.

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Patients with chronic liver disease commonly have abnormal lung function, however the impact of smoking on outcomes in these patients is unknown. We hypothesized current or past smoking would be associated with worse survival in patients with advanced liver disease. The Pulmonary Vascular Complications in Liver Disease Study 2 (PVCLD2) was a prospective cohort of patients with advanced liver disease undergoing evaluation for liver transplantation (LT).

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Hepatopulmonary syndrome (HPS) and a hyperdynamic circulation are common complications of advanced liver disease, but the relationship between HPS and cardiac index (CI) is poorly understood. We sought to compare CI in patients with and without HPS and to assess the relationship between CI and symptoms, quality of life, gas exchange, and exercise capacity among liver transplantation (LT) candidates. We performed a cross-sectional analysis within the Pulmonary Vascular Complications of Liver Disease 2 study, a multicenter prospective cohort study of patients being evaluated for LT.

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A 6-minute walk test is a simple tool for assessing submaximal exercise capacity. We sought to determine whether a 6-minute walk distance (6MWD) predicts outcomes in patients with cirrhosis. The Pulmonary Vascular Complications of Liver Disease 2 study is a multicenter, prospective cohort study that enrolled adults with portal hypertension during liver transplantation evaluation.

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Objectives: Chronic liver disease is often associated with testosterone deficiency. However, testosterone replacement does not improve hepatic function or survival with diseased liver. So far, to our knowledge, testosterone replacement therapy after successful livertransplantforfunctional sarcopenia has not been studied.

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Article Synopsis
  • Hepatopulmonary syndrome, affecting 10-30% of cirrhosis patients, was studied to examine its clinical impact and serum angiogenic profile in those preparing for liver transplant.
  • The research involved 85 patients with hepatopulmonary syndrome and 146 without, revealing that the former had more complications, worse exercise capacity, and higher levels of certain biomarkers.
  • Overall, the study found that patients with hepatopulmonary syndrome faced a significantly increased risk of death, emphasizing the condition's severity regardless of oxygenation levels.
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Article Synopsis
  • * A study analyzed over 1,150 HPS patients, finding that higher MELD scores (a measure of liver disease severity) corresponded to increased pre-transplant mortality and lower chances of receiving a transplant.
  • * Post-transplant, patients with a PaO <45 mmHg showed lower survival rates, with significant differences in survival becoming apparent after 2.6 years; however, those patients still had a median survival of 11.5 years, indicating
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Unlabelled: Renal dysfunction is associated with poor long-term outcomes after liver transplantation. We examined the renal sparing effect of everolimus (EVR) compared to standard calcineurin inhibitor (CNI) immunosuppression with direct measurements of renal function over 24 months.

Methods: This was a prospective, randomized, open-label trial comparing EVR and mycophenolic acid (MPA) with CNI and MPA immunosuppression.

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Background And Aims: Portopulmonary hypertension (POPH) was previously associated with a single-nucleotide polymorphism (SNP) rs7175922 in aromatase (cytochrome P450 family 19 subfamily A member 1 [CYP19A1]). We sought to determine whether genetic variants and metabolites in the estrogen signaling pathway are associated with POPH.

Approach And Results: We performed a multicenter case-control study.

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We investigated the prevalence of spirometric restriction in liver transplantation (LT) candidates and the clinical impacts of restriction. We performed a cross-sectional study within the Pulmonary Vascular Complications of Liver Disease 2 (PVCLD2) study, a multicenter prospective cohort study of patients being evaluated for LT. Patients with obstructive lung disease or missing spirometry or chest imaging were excluded.

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Background: Resident physicians' achievement of professional competencies requires reflective practice skills and faculty coaching. Graduate medical education programs, however, struggle to operationalize these activities.

Objective: To (1) describe the process and strategies for implementing an Internal Medicine (IM) resident coaching program that evolved in response to challenges, (2) characterize residents' professional learning plans (PLPs) and their alignment with EPAs, and, (3) examine key lessons learned.

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  • A recent study examined whether the use of direct-acting antiviral (DAA) therapy for hepatitis C virus (HCV) affects the recurrence rate of hepatocellular carcinoma (HCC) in liver transplant (LTx) recipients.
  • The study involved 63 patients, dividing them into three groups based on their HCV status and DAA therapy: 27 received DAA (Group A), 20 did not (Group B), and 16 had no HCV (Group C).
  • Results showed that HCC recurrence was higher in patients from Group A who achieved end of treatment response (ETR) without sustained virological response (SVR), indicating that more research is needed to understand the implications of DAA therapy
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Objectives: Newly developed, direct-acting antiviral therapy is effective in over 90% of cases to eradicate hepatitis C virus infection. Direct-acting antiviral therapy is also effective in liver transplant recipients with recurrent hepatitis C virus infection. However, hepatic function after sustained virologic response in transplant recipients is unknown.

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Screening for hepatopulmonary syndrome (HPS) using pulse oximetry is recommended in liver transplant (LT) candidates because mortality is increased, independently of the severity of the oxygenation defect. LT exception points may be afforded to those with HPS and severe hypoxemia. We assessed the screening characteristics of pulse oximetry for HPS.

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Cancers of the digestive system remain highly lethal; therefore, the care of patients with malignant diseases of the digestive tract requires the expertise of providers from multiple health disciplines. Progress has been made to advance the understanding of epidemiology and genetics, diagnostic and screening evaluation, treatment modalities, and supportive care for patients with gastrointestinal cancers. At the Multi-Disciplinary Patient Care in Gastrointestinal Oncology conference at the Hershey Country Club in Hershey, Pennsylvania on 29 September 2017, the faculty members of the Penn State Health Milton S.

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Background: Intrapulmonary vascular dilatations (IPVD) frequently are detected in patients with liver disease by the delayed appearance of microbubbles at contrast-enhanced echocardiography. IPVD with an elevated alveolar-arterial (A-a) gradient define hepatopulmonary syndrome (HPS); however, the importance of IPVD in the absence of abnormal gas exchange is unknown. We aimed to determine the clinical impact of IPVD in patients with liver disease.

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Background & Aims: There is limited knowledge about hepatitis B virus (HBV) flare among pregnant women. We evaluated the incidence, determinants and outcomes of HBV flare in a multicultural cohort of pregnant HBV-infected women in the United States.

Methods: We performed a retrospective cohort study of pregnant hepatitis B surface antigen-positive women cared for at hospital-based clinics of 4 medical centres in Southeastern Pennsylvania from 2006 to 2015.

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Long-term outcomes of the Fontan operation include Fontan failure and liver disease. Combined heart-liver transplantation (CHLT) is an option for select patients although limited data exist on this strategy. A retrospective review of Fontan patients 18 years or older referred for cardiac transplant evaluation between 2000 and 2013 at the Hospital of the University of Pennsylvania was performed.

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Introduction: Capsule endoscopy has been suggested as a potential alternative to endoscopy for detection of esophagogastric varices and severe portal hypertensive gastropathy (PHG). The aim of the study was to determine whether PillCam esophageal capsule endoscopy could replace endoscopy for screening purposes.

Material And Methods: Sixty-two patients with cirrhosis with no previous variceal bleeding had PillCam capsule endoscopy and video endoscopy performed on the same day.

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Objective: The aim of this study is to evaluate portal hypertension as an independent risk factor in general surgical procedures.

Background: Data on the impact of portal hypertension in general surgical outcomes has been limited. Published literature has focused mainly on its effect in liver surgery.

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Background & Aims: Patients with hepatopulmonary syndrome (HPS) are prioritized for liver transplantation (given exception points) due to their high pre- and post-transplantation mortality. However, few studies have evaluated the outcomes of these patients.

Methods: We performed a retrospective cohort study using data submitted to the United Network for Organ Sharing in a study of the effects of room-air oxygenation on pre- and post-transplantation outcomes of patients with HPS.

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