Publications by authors named "David H Harpole"

Purpose: The phase 3 Veterans Affairs Lung Cancer Surgery Or Stereotactic Radiotherapy study implemented centralized quality assurance (QA) to mitigate risks of protocol deviations. This report summarizes the quality and compliance of the first 100 participants treated with stereotactic body radiation therapy (SBRT) in this study.

Methods And Materials: A centralized QA program was developed to credential and monitor study sites to ensure standard-of-care lung SBRT treatments are delivered to participants.

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Advances in the multidisciplinary care of early stage resectable NSCLC (rNSCLC) are emerging at an unprecedented pace. Numerous phase 3 trials produced results that have transformed patient outcomes for the better, yet these findings also require important modifications to the patient treatment journey trajectory and reorganization of care pathways. Perhaps, most notably, the need for multispecialty collaboration for this patient population has never been greater.

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Background: Despite surgical resection, long-term survival of patients with resectable non-small cell lung cancer (NSCLC) remains poor. Adjuvant chemotherapy, the standard of care for locally advanced NSCLC, provides a marginal 5.4% benefit in survival.

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Outcomes for patients with esophageal cancer have improved over the last decade with the implementation of multimodality therapy. There are currently no comprehensive guidelines addressing multidisciplinary management of esophageal cancer that have incorporated the input of surgeons, radiation oncologists, and medical oncologists. To address the need for multidisciplinary input in the management of esophageal cancer and to meet current best practices for clinical practice guidelines, the current guidelines were created as a collaboration between The Society of Thoracic Surgeons (STS), American Society for Radiation Oncology (ASTRO), and the American Society of Clinical Oncology (ASCO).

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Outcomes for patients with esophageal cancer have improved over the last decade with the implementation of multimodality therapy. There are currently no comprehensive guidelines addressing multidisciplinary management of esophageal cancer that have incorporated the input of surgeons, radiation oncologists, and medical oncologists. To address the need for multidisciplinary input in the management of esophageal cancer and to meet current best practices for clinical practice guidelines, the current guidelines were created as a collaboration between The Society of Thoracic Surgeons (STS), American Society for Radiation Oncology (ASTRO), and the American Society of Clinical Oncology (ASCO).

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Objectives: To characterize and quantify accumulating immunologic alterations, pre and postoperatively in patients undergoing elective surgical procedures.

Background: Elective surgery is an anticipatable, controlled human injury. Although the human response to injury is generally stereotyped, individual variability exists.

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Objective: To determine the threshold annualized esophagectomy volume that is associated with improved survival, oncologic resection, and postoperative outcomes.

Background: Esophagectomy at high-volume centers is associated with improved outcomes; however, the definition of high-volume remains debated.

Methods: The 2004 to 2016 National Cancer Database was queried for patients with clinical stage I to III esophageal cancer undergoing esophagectomy.

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Article Synopsis
  • A biospecimen repository is being established to combine multi-omics data and clinical information, aiming to explore how controlled injuries and healing occur in humans during elective surgeries.
  • The study focuses on collecting comprehensive biological data from patients before and after 14 types of surgeries, analyzing various specimen types to understand genetic and metabolic responses to surgical trauma.
  • Early results show the collection of extensive data on mRNA transcripts, metabolites, and proteins, confirming the potential of this approach for future biomedical research and insights into healing processes.
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Background: The outcomes associated with receipt of adjuvant radiation in patients after surgery for MPM are poorly understood.

Objective: The objective of this study was to use 2 registries to compare the outcomes of patients receiving adjuvant radiation or no radiation after definitive surgery for pathologic stage I-III MPM.

Methods: Patients with resected pathologic stage I-III MPM were identified from the Duke University registry (1996-2016) and National Cancer Database (NCDB) (2004-2015).

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Objectives: Pembrolizumab is a programmed death receptor-1 masking antibody approved for metastatic non-small cell lung cancer. This Phase 2 study (NCT02818920) of neoadjuvant pembrolizumab in non-small cell lung cancer had a primary end point of safety and secondary end points of efficacy and correlative science.

Methods: Patients with untreated clinical stage IB to IIIA non-small cell lung cancer were enrolled.

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Background: Endoscopic resection (ER) is the preferred treatment for superficial esophageal cancer; however, a safe time frame for performing ER has not been established. This study evaluated the period in which ER can be performed for patients with stage I esophageal adenocarcinoma without compromising outcomes.

Methods: The 2004-2015 National Cancer Database was used to identify patients with cT1 N0 M0 esophageal adenocarcinoma who underwent upfront ER.

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Background: There are conflicting reports in the literature comparing outcomes after open Ravitch and minimally invasive Nuss procedures for pectus excavatum repair, and there is relatively little data available comparing the outcomes of these procedures performed by thoracic surgeons.

Methods: The 2010 to 2018 Society of Thoracic Surgeons General Thoracic Surgery Database was queried for patients age 12 or greater undergoing open or minimally invasive repair of pectus excavatum. Patients were stratified by operative approach.

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Background: Although SABR is increasingly emerging as an alternative to surgery for node-negative non-small cell lung cancer, there is poor understanding of patients who may most benefit SABR compared to surgery.

Objective: This study examined the relationship between tumor size and the comparative outcomes of SABR and sublobar resection in patients with node-negative non-small cell lung cancer.

Results: A total of 59,949 patients met study criteria: 19,888 (33%) underwent SABR, 33,052 (55%) wedge resection, and 7009 (12%) segmental resection.

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Article Synopsis
  • The review discusses the use of stellate ganglion blockade (SGB) as a treatment for patients with severe ventricular arrhythmias that don't respond to other therapies.
  • SGB can significantly reduce the frequency of arrhythmias and defibrillation events for 24-72 hours, providing a critical window for additional treatments like catheter ablation or heart surgery.
  • The procedure is shown to be safe, even in patients on anticoagulants, and is effective across different types and causes of ventricular arrhythmias.
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The objective of this study was to evaluate the impact of a video-assisted thoracoscopic (VATS) approach on outcomes in patients who underwent sleeve lobectomy for non-small-cell lung cancer (NSCLC). Outcomes of patients with cT1-T3, N0-N2, M0 NSCLC who underwent sleeve lobectomy in the National Cancer Data Base (NCDB) from 2010-2015 were assessed using Kaplan-Meier, propensity score-matching, and Cox proportional hazards analyses. An "intent-to-treat" analysis was performed.

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Background: Older patients are often considered high-risk surgical candidates for locally advanced esophageal cancer, and the benefit of surgery in this population is unclear. This national analysis examines the effect of age on esophagectomy outcomes and compares surgery versus chemoradiation in older patients.

Methods: The National Cancer Database was used to identify patients with clinical stage II to III esophageal adenocarcinoma undergoing surgery or definitive chemoradiation between 2004 and 2015.

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Introduction: Surgical resection is curative for some patients with early lung squamous cell carcinoma. Staging and clinical factors do not adequately predict recurrence risk. We sought to validate the discriminative performance of proposed prognostic gene expression signatures at a level of rigor sufficient to support clinical use.

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Background: Induction therapy for patients with cT2N0M0 esophageal cancer is controversial. We performed a retrospective cohort analysis of the National Cancer Database to examine the patterns of use of induction therapy for this population.

Methods: The National Cancer Database was queried for patients with cT2N0M0 esophageal cancer who underwent esophagectomy (2004-2015).

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Background: The interaction between tumor size and the comparative prognosis of lobar and sublobar resection has been defined poorly.

Research Question: The purpose of this study was to characterize the relationship between tumor size and the receipt of segmentectomy or lobectomy in association with overall survival in patients with clinically node-negative non-small cell lung cancer (NSCLC).

Study Design And Methods: The 2004-2015 National Cancer Database (NCDB) was queried for patients with cT1-3N0M0 NSCLC who underwent segmentectomy or lobectomy without neoadjuvant therapy or missing survival data.

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Background: We hypothesized that the ratio of positive lymph nodes to total assessed lymph nodes (LNR) is an indicator of cancer burden in esophageal adenocarcinoma and may identify patients who may most benefit from AC.

Objective: The aim of this study was to discern whether there is a threshold LNR above which AC is associated with a survival benefit in this population.

Methods: The 2004-2015 National Cancer Database was queried for patients who underwent upfront, complete resection of pT1-4N1-3M0 esophageal adenocarcinoma.

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Background: The aims of this study were to examine the factors associated with use of neoadjuvant chemoradiotherapy (NCR) for patients with locally advanced esophageal cancer and to evaluate the effect of NCR on survival.

Methods: The 2004 to 2015 National Cancer Database was used to identify patients with cT1-4aN1-3M0 (stage II-IVA) esophageal adenocarcinoma who underwent esophagectomy. Patients were stratified by receipt of NCR.

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Background: The National Comprehensive Cancer Network guidelines recommend surgery for limited stage small cell lung cancer (SCLC). However, there is no literature on minimum acceptable lymph node retrieval in surgery for SCLC.

Methods: The National Cancer Database was queried for adult patients undergoing lobectomy for limited stage (cT1-2N0M0) SCLC from 2004 to 2015.

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Article Synopsis
  • This study aimed to establish a neurocardiology service to offer autonomic modulation as a treatment for treatment-refractory ventricular arrhythmias (VAs).
  • The research involved 20 patients undergoing temporary stellate ganglion blockade (SGB) and found significant reductions in VA episodes and defibrillation events within 24 and 48 hours post-procedure.
  • Results showed that SGB was safe and effective, with 45% of patients experiencing no recurrence of ventricular tachycardia (VT) or ventricular fibrillation (VF) after treatment.
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