Abstract:
INTRODUCTION:Pulmonary emphysema causes several electrocardiogram changes, and one of the most common and well known is on the frontal P-wave axis. P-axis verticalization (P-axis > 60°) serves as a quasidiagnostic indicator of emphysema. The correlation of P-axis verticalization with the radiological severity of emphysema and severity of chronic obstructive lung function have been previously investigated and well described in the literature. However, the correlation of P-axis verticalization in emphysema with other P-indices like P-terminal force in V1 (Ptf), amplitude of initial positive component of P-waves in V1 (i-PV1), and interatrial block (IAB) have not been well studied. Our current study was undertaken to investigate the effects of emphysema on these P-wave indices in correlation with the verticalization of the P-vector. MATERIALS AND METHODS:Unselected, routinely recorded electrocardiograms of 170 hospitalized emphysema patients were studied. Significant Ptf (s-Ptf) was considered ≥40 mm.ms and was divided into two types based on the morphology of P-waves in V1: either a totally negative (-) P wave in V1 or a biphasic (+/-) P wave in V1. RESULTS:s-Ptf correlated better with vertical P-vectors than nonvertical P-vectors (P = 0.03). s-Ptf also significantly correlated with IAB (P = 0.001); however, IAB and P-vector verticalization did not appear to have any significant correlation (P = 0.23). There was a very weak correlation between i-PV1 and frontal P-vector (r = 0.15; P = 0.047); however, no significant correlation was found between i-PV1 and P-amplitude in lead III (r = 0.07; P = 0.36). CONCLUSION:We conclude that increased P-tf in emphysema may be due to downward right atrial position caused by right atrial displacement, and thus the common assumption that increased P-tf implies left atrial enlargement should be made with caution in patients with emphysema. Also, the lack of strong correlation between i-PV1 and P-amplitude in lead III or vertical P-vector may suggest the predominant role of downward right atrial distortion rather than right atrial enlargement in causing vertical P-vector in emphysema.
journal_name
Int J Chron Obstruct Pulmon Disauthors
Chhabra L,Chaubey VK,Kothagundla C,Bajaj R,Kaul S,Spodick DHdoi
10.2147/COPD.S45127subject
Has Abstractpub_date
2013-01-01 00:00:00pages
245-50eissn
1176-9106issn
1178-2005pii
copd-8-245journal_volume
8pub_type
杂志文章abstract:Purpose:Revefenacin, a long-acting muscarinic antagonist for nebulization, has been shown to improve lung function in patients with chronic obstructive pulmonary disease. Here we report pharmacokinetic (PK) and safety results from two multicenter, open-label, single-dose trials evaluating revefenacin in subjects with s...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S203709
更新日期:2019-10-08 00:00:00
abstract::The aim of the study was to assess the budgetary impact of funding smoking-cessation drugs in COPD patients in Spain. A hybrid model (cohort and Markov) was developed for a 5-year time horizon. Only approved cessation drugs (varenicline, bupropion, and nicotine replacement therapy) were considered. Irrespective of the...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S87597
更新日期:2015-09-24 00:00:00
abstract:Background:Metabolic syndrome (MetS) is a well-known comorbidity of chronic obstructive pulmonary disease (COPD). However, their interrelationship, particularly in early COPD, remains unclear. Therefore, we aimed to assess the prevalence and clinical characteristics of MetS in patients with early COPD, and to explore t...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S228497
更新日期:2019-12-10 00:00:00
abstract:OBJECTIVE:β-Blockers are safe and improve survival in patients with both congestive heart failure (CHF) and COPD. However, the superiority of different types of β-blockers is still unclear among patients with CHF and COPD. The association between β-blockers and CHF exacerbation as well as COPD exacerbation remains uncl...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S141694
更新日期:2017-08-26 00:00:00
abstract:Objective:Chronic obstructive pulmonary disease (COPD) is associated with atherosclerosis. Previous studies including limited sample sizes have shown the prevalence of peripheral arterial occlusive disease (PAOD) among COPD patients. We sought to investigate the incidence of PAOD among COPD patients in Taiwan using a n...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S202029
更新日期:2019-07-04 00:00:00
abstract:BACKGROUND:Prediction of future exacerbations of chronic obstructive pulmonary disease (COPD) is a major concern for long-term management of this disease. AIM:To determine which of three multidimensional assessment systems (the body mass index, obstruction, dyspnea, and exercise capacity [BODE] index; dyspnea, obstruc...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S42769
更新日期:2013-01-01 00:00:00
abstract::Noninvasive ventilation (NIV) has been one of the major advances in respiratory medicine in the last decade. NIV improves quality of life, prolongs survival, and improves gas exchange and sleep quality in restrictive patients, but evidence available now does not allow us to establish clear criteria for prescribing NIV...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/copd.2006.1.2.129
更新日期:2006-01-01 00:00:00
abstract:Background:COPD is considered an independent risk factor for lung cancer. COPD and lung cancer are both very heterogeneous diseases, and the study herein investigates the link between COPD phenotypes and specific histological subtypes of lung cancer. Methods:This case-control study comprised 2,283 patients with newly ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S158818
更新日期:2018-04-13 00:00:00
abstract::Health status questionnaires provide standardized measures of patients' perceptions of the impact of disease on their daily life and well-being. Factors associated with health status were examined in a sample of 58 outpatients with chronic obstructive pulmonary disease (COPD) and co-morbid anxiety and/or depression. A...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,随机对照试验
doi:
更新日期:2007-01-01 00:00:00
abstract:Background:Patients with chronic obstructive pulmonary disease (COPD) and cardiovascular comorbidities may have an increased risk of medication-related cardiac arrhythmias. We therefore performed an analysis of Holter electrocardiogram (ECG) data from two large, long-term, controlled clinical COPD trials to investigate...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S246350
更新日期:2020-08-10 00:00:00
abstract:BACKGROUND:The causal association between depression, anxiety, and health-related quality of life (HRQoL) in chronic obstructive pulmonary disease (COPD) is unclear. We therefore conducted a systematic review of prospective cohort studies that measured depression, anxiety, and HRQoL in COPD. METHODS:Electronic databas...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,meta分析,评审
doi:10.2147/COPD.S58136
更新日期:2014-05-20 00:00:00
abstract:Background:Thirty-day readmission in COPD is common and costly, but potentially preventable. The emergency department (ED) may be a setting for COPD readmission reduction efforts. Objective:To better understand COPD readmission through the ED, ascertain factors associated with 30-day readmission through the ED, and id...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S147796
更新日期:2017-12-27 00:00:00
abstract::Chronic obstructive pulmonary disease (COPD) is a progressive respiratory disease with an increasing prevalence worldwide. Its potential consequences, including reduced function and reduced social participation, are likely to be associated with decreased health-related quality of life (HRQoL). However, illness percept...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S52700
更新日期:2014-01-01 00:00:00
abstract:Purpose:Epigenetic modification is one of most important mechanisms underlying the pathogenesis of chronic obstructive pulmonary disease (COPD). The purpose of this study was to determine whether histone acetyltransferase binding to ORC1 (HBO1) can protect against cigarette smoke (CS)-induced cell apoptosis and sustain...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S234634
更新日期:2020-01-06 00:00:00
abstract:BACKGROUND AND OBJECTIVES:Alpha-1-antitrypsin deficiency (AATD) is associated with a high risk for the development of early-onset emphysema and liver disease. A large majority of subjects with severe AATD carry the ZZ genotype, which can be easily detected. Another rare pathologic variant, the Mmalton allele, causes a ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S115940
更新日期:2016-10-11 00:00:00
abstract:BACKGROUND:The aim of this study was to determine whether long-term intermittent azithromycin therapy reduces the frequency of exacerbation in severe chronic obstructive pulmonary disease (COPD). METHODS:We retrospectively investigated the clinical benefits of long-term azithromycin (500 mg orally three times per week...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S23655
更新日期:2011-01-01 00:00:00
abstract:Background:Health effects of electronic cigarette (EC) use in patients with chronic obstructive pulmonary disease (COPD) are largely unexplored. Aim:We present findings from a long-term prospective assessment of respiratory parameters in a cohort of COPD patients who ceased or substantially reduced conventional cigare...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S161138
更新日期:2018-08-22 00:00:00
abstract:Purpose:To evaluate clinical periodontal status and microbiologic pathogens in patients with chronic obstructive pulmonary disease (COPD) and periodontitis. Patients and Methods:We conducted a case-control study of 60 periodontitis patients with COPD (case group) and 60 periodontitis patients with normal pulmonary fun...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S266612
更新日期:2020-09-03 00:00:00
abstract:Background:Previous studies suggest that gender differences exist in COPD diagnosis and symptoms; these differences may be more pronounced in younger adults. Our objective was to explore age-associated gender differences across a range of COPD severities. Materials and methods:A total of 4,484 current and former smoke...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,多中心研究
doi:10.2147/COPD.S160270
更新日期:2018-10-01 00:00:00
abstract:Background:People living with both chronic obstructive pulmonary disease (COPD) and frailty have high potential to benefit from exercise-based interventions, including pulmonary rehabilitation, but face challenges completing them. Research to understand ways to optimise exercise-based interventions in this group is lac...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,评审
doi:10.2147/COPD.S238680
更新日期:2020-04-20 00:00:00
abstract:Background:Airway inflammation may drive the progression of chronic obstructive pulmonary disease (COPD) associated with alpha-1 antitrypsin deficiency (AATD), but the relationship between airway microbiota and inflammation has not been investigated. Methods:We studied 21 non-treated AATD (AATD-noT) patients, 20 AATD-...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S207203
更新日期:2019-08-21 00:00:00
abstract:Purpose:There is currently no measure to predict a treatability of long-acting β-2 agonist (LABA) or long-acting muscarinic antagonist (LAMA) in patients with chronic obstructive pulmonary disease (COPD). We aimed to build prediction models for the treatment response to these bronchodilators, in order to determine the ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.2147/COPD.S151909
更新日期:2017-12-12 00:00:00
abstract:PURPOSE:A low body mass index has been associated with high mortalities in patients with chronic obstructive pulmonary disease (COPD), and studies reveal that obesity aggravates the clinical effects of COPD. We investigated the impact of obesity on patients newly identified with COPD. PATIENTS AND METHODS:This populat...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S126192
更新日期:2017-02-24 00:00:00
abstract:Purpose:The primary aim of this research was to raise awareness for COPD through real narratives of patients, caregivers, and pulmonologists. The second objective includes providing clinicians new means of caring for and treating patients with COPD. Methods:Using narrative medicine, testimonies from patients, their ca...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S172214
更新日期:2018-10-05 00:00:00
abstract:BACKGROUND:Long-acting inhaled bronchodilators, including anticholinergic tiotropium, are recommended for the maintenance therapy of chronic obstructive pulmonary disease (COPD). It has been shown in a number of studies that treatment with tiotropium alleviates symptoms, improves exercise tolerance, health status, and ...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章,多中心研究
doi:10.2147/COPD.S77144
更新日期:2015-03-18 00:00:00
abstract::Cigarette smoking is an established cause of lung cancer. However, pulmonary fibrosis is also an independent risk factor for the development of lung cancer. Smoking-related interstitial fibrosis (SRIF) has recently been reported. We hypothesized that adenocarcinomas in lungs with SRIF might show distinct molecular cha...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S61932
更新日期:2014-05-24 00:00:00
abstract:BACKGROUND:It has been scientifically proven that pulmonary rehabilitation improves exercise tolerance and facilitates the carrying out of daily physical activities. To optimize the physical and physiological benefits, it is necessary to individualize the training intensity for each patient. The aim of this study is to...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S129889
更新日期:2017-05-16 00:00:00
abstract:Background:Microparticles (MPs) are shedding membrane vesicles released from activated blood and endothelial cells under inflammatory conditions. The role of endothelial MPs (EMPs) in pathophysiology of COPD is relatively well known. However, the release and function of MPs of other cellular origins, eg, platelets, red...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S175607
更新日期:2018-11-15 00:00:00
abstract:BACKGROUND:Cardiac autonomic modulation (CAM) is impaired in patients with stable COPD. Exacerbation aggravates the patients' health status and functional capacity. While the clinical and functional effects of exacerbation are known, no studies investigated CAM during exacerbation and whether there is a relationship be...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S134498
更新日期:2017-07-28 00:00:00
abstract:Purpose:Previous studies have described the incidence, risk factors, and outcomes for patients with acute exacerbations of COPD (AECOPD) developing acute kidney injury (AKI). However, little is known about the differences between community-acquired AKI (CA-AKI) and hospital-acquired AKI (HA-AKI) in patients with AECOPD...
journal_title:International journal of chronic obstructive pulmonary disease
pub_type: 杂志文章
doi:10.2147/COPD.S164648
更新日期:2018-07-17 00:00:00