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The Lancet. Respiratory Medicine Jun 2021The emergent 21st century betacoronaviruses, including SARS-CoV-2, lead to clinicopathological manifestations with unusual features, such as early-onset chest pain,... (Review)
Review
The emergent 21st century betacoronaviruses, including SARS-CoV-2, lead to clinicopathological manifestations with unusual features, such as early-onset chest pain, pulmonary infarction, and pulmonary and systemic thromboembolism that is pathologically linked to extensive capillary, arteriolar, and venular thrombosis. Early ground glass opacities detected by CT, which are reminiscent of lung infarcts associated with pulmonary embolism, point to a novel vascular pathology in COVID-19. Under physiological conditions, normal parenchymal oxygenation is maintained by three sources: the alveolus itself and dual oxygen supply from the pulmonary and bronchial artery circulations. We propose a model in which these three components are disrupted in COVID-19 pneumonia, with severe viral alveolitis and concomitant immunothrombotic obstruction of the pulmonary and bronchiolar circulation. Tricompartmental disruption might have two main consequences: systemic clot embolisation from pulmonary vein territory immunothrombosis, and alveolar-capillary barrier disruption with systemic access of thrombogenic viral material. Our model encompasses the known pathological and clinical features of severe COVID-19, and has implications for understanding patient responses to immunomodulatory therapies, which might exert an anti-inflammatory effect within the vascular compartments.
Topics: COVID-19; Humans; Lung; Models, Biological; Oxygen Consumption; Pulmonary Circulation; Pulmonary Embolism; SARS-CoV-2
PubMed: 34000237
DOI: 10.1016/S2213-2600(21)00213-7 -
Asian Cardiovascular & Thoracic Annals Jun 2018Background Lung infarction is a rare complication of lung resection, developing mainly because of technical errors. In some cases, a specific reason cannot be...
Background Lung infarction is a rare complication of lung resection, developing mainly because of technical errors. In some cases, a specific reason cannot be identified. This study aimed to investigate the occurrence, characteristics, and outcome of this pathology in a series of patients. Methods The medical records of patients who underwent reoperation for lung infarction without an apparent cause (based on imaging, reoperation findings, and histopathology) after major lung resection at our institution from 2006 to 2015, were investigated. Results Seven patients were identified. The mean age was 62.2 years (range 51-75 years), and 5 were male. Copious dissection or adverse events during surgery were recorded in all but 2 cases. The main presenting symptom was unsettling frank hemoptysis (4 cases) with a variable time of onset of symptoms (4-164 h). All reoperations necessitated further lung resection (4 patients had a further lobectomy and 3 had a completion pneumonectomy). During reoperation, all vessels and bronchi were intact. No apparent cause of infarction could be identified according to the histopathology report. Morbidity after reoperation was atrial fibrillation in 3 cases and bronchopleural fistula in 2, one of which required a transsternal pneumonectomy and this was the only mortality. Length of stay ranged from 8 to 90 days. Conclusion Ipsilateral lung infarction after lobectomy is a rare complication and the reason may not be identifiable. Treatment usually requires reoperation. Extensive manipulation or adverse events during surgery could induce this rare complication.
Topics: Aged; Biopsy; Databases, Factual; England; Female; Hemoptysis; Humans; Infarction; Length of Stay; Lung; Male; Middle Aged; Pneumonectomy; Postoperative Hemorrhage; Reoperation; Retrospective Studies; Risk Factors; Time Factors; Tomography, X-Ray Computed; Treatment Outcome
PubMed: 29734831
DOI: 10.1177/0218492318776144 -
The American Journal of Medicine Nov 2015
Topics: Electrocardiography; Humans; Male; Myocardial Infarction; Pulmonary Embolism
PubMed: 26500206
DOI: 10.1016/j.amjmed.2015.06.010 -
Respirology Case Reports Sep 2021A 28-year-old woman with a history of treatment with a low-dose oestrogen-progestin (LEP) formulation presented to our hospital due to right chest pain. She had just...
A 28-year-old woman with a history of treatment with a low-dose oestrogen-progestin (LEP) formulation presented to our hospital due to right chest pain. She had just been discharged from another hospital for pneumonia and pleurisy which had improved with antibiotics. Contrast-enhanced computed tomography (CT) revealed bilateral pulmonary emboli corresponding to the peripheral consolidations. The pulmonary emboli indicated that the peripheral consolidation was due to pulmonary infarction (PI). No aetiological factors were identified except for the history of LEP therapy. Although the typical CT images of PI are consolidations in the peripheral area, these finding are non-specific for PI. This case of PI was misdiagnosed as infection because of response to antibiotics and similar CT findings. Therefore, careful evaluation of the patient history and clinical findings are imperative for accurate diagnosis. Venous thromboembolism can occur frequently around 3 months after the start of LEP treatment.
PubMed: 34430034
DOI: 10.1002/rcr2.833 -
Respirology Case Reports Sep 2017Pulmonary arteriovenous malformation (PAVM) is an abnormal blood vessel connecting a pulmonary artery and a vein, and is accompanied by paradoxical embolism to other...
Pulmonary arteriovenous malformation (PAVM) is an abnormal blood vessel connecting a pulmonary artery and a vein, and is accompanied by paradoxical embolism to other organs due to a right-to-left shunt. We report the case of a 66-year-old woman with PAVM complicated by splenic infarction and abscess. Although the PAVM had been detected on a chest image 2 years previously, and she had been advised to have further investigations, she decided not to follow this further at the time. She then visited our hospital complaining of worsening dyspnoea on exertion. Detailed examinations revealed splenic infarction and abscessation due to PAVM. PAVM embolization was performed after antibiotic treatment. It is very rare for PAVM to be complicated by splenic infarction and abscess. Regardless of its size, embolization of a PAVM as soon as possible can reduce not only the risk of central nervous system complications, but also the risk of splenic infarction and abscess.
PubMed: 28736615
DOI: 10.1002/rcr2.254 -
Rheumatology (Oxford, England) Dec 2021This study aimed to describe pulmonary high-resolution CT (HRCT) findings in Takayasu arteritis (TA) and to determine possible causes. (Observational Study)
Observational Study
OBJECTIVE
This study aimed to describe pulmonary high-resolution CT (HRCT) findings in Takayasu arteritis (TA) and to determine possible causes.
METHODS
A total of 243 TA patients were enrolled from a prospective cohort after excluding patients with other pulmonary disorders or incomplete data. Patients were divided into two groups: those with normal lung HRCT and those with abnormal lung HRCT. Clinical characteristics were compared between groups and binary logistic regression analysis was applied to identify possible causes of the lung lesions. Follow-up HRCT (obtained in 64 patients) was analysed to study changes in pulmonary lesions after treatment.
RESULTS
Of the 243 patients, 107 (44.0%) had normal lung HRCT while 136 (56.0%) had abnormal lung HRCT, including stripe opacity (60.3%), nodules (44.9%), patchy opacity (25.0%), pleural thickening (15.4%), pleural effusion (10.3%), ground-glass opacity (8.1%), pulmonary infarction (6.6%), mosaic attenuation (4.4%), bronchiectasis (3.7%) and pulmonary oedema (2.2%). Patients with abnormal HRCT were significantly more likely to have type II arterial involvement (25% vs 12.2%, P = 0.04), pulmonary arterial involvement (PAI; 21.3% vs 5.6%, P < 0.001), pulmonary hypertension (20.6% vs 8.4%, P = 0.01) and abnormal heart function (27.9% vs 7.6%, P < 0.001). Logistic regression analysis demonstrated that PAI, worsened heart function and age were associated with presence of pulmonary lesions. Pulmonary infarction, pleural effusion and patchy opacities improved partially after treatment.
CONCLUSION
Pulmonary lesions are not rare in patients with TA. Age, PAI and worsened heart function are potential risk factors for presence of pulmonary lesions in TA.
Topics: Adult; Diagnosis, Differential; Female; Follow-Up Studies; Humans; Lung; Male; Prospective Studies; Pulmonary Infarction; Takayasu Arteritis; Tomography, X-Ray Computed
PubMed: 33590834
DOI: 10.1093/rheumatology/keab163 -
Journal of Anesthesia Jun 2016Although cardiac output (CO) by pulmonary artery catheterization (PAC) has been an important guideline in clinical management for more than four decades, some studies... (Review)
Review
Although cardiac output (CO) by pulmonary artery catheterization (PAC) has been an important guideline in clinical management for more than four decades, some studies have questioned the clinical efficacy of CO in certain patient populations. Further, the use of CO by PAC has been linked to numerous complications including dysrhythmia, infection, rupture of pulmonary artery, injury to adjacent arteries, embolization, pulmonary infarction, cardiac valvular damage, pericardial effusion, and intracardiac catheter knotting. The use of PAC has been steadily declining over the past two decades. Minimally invasive and noninvasive CO monitoring have been studied in the past two decades with some evidence of efficacy. Several different devices based on pulse contour analysis are available currently, including the uncalibrated FloTrac/Vigileo system and the calibrated PiCCO and LiDCO systems. The pressure-recording analytical method (PRAM) system requires only an arterial line and is commercially available as the MostCare system. Transesophageal echocardiography (TEE) can measure CO by non-Doppler- or Doppler-based methods. The partial CO2 rebreathing technique, another method to measure CO, is marketed by Novametrix Medical Systems as the NICO system. Thoracic electrical bioimpedance (TEB) and electric bioreactance (EB) are totally noninvasive CO monitoring. Nexfin HD and the newer ClearSight systems are examples of noninvasive CO monitoring devices currently being marketed by Edwards Lifesciences. The developing focus in CO monitoring devices appears to be shifting to tissue perfusion and microcirculatory flow and aimed more at markers that indicate the effectiveness of circulatory and microcirculatory resuscitations.
Topics: Calibration; Cardiac Output; Catheterization, Swan-Ganz; Humans; Microcirculation; Monitoring, Physiologic; Pulmonary Artery; Thermodilution
PubMed: 26961819
DOI: 10.1007/s00540-016-2154-9 -
Archives of Academic Emergency Medicine 2020Since the novel coronavirus emerged in late December, 2019 in Wuhan, China, millions of people have been infected and thousands of patients have died. Fever and dyspnea...
Since the novel coronavirus emerged in late December, 2019 in Wuhan, China, millions of people have been infected and thousands of patients have died. Fever and dyspnea are the most common symptoms of infection with SARS-CoV-2. However, these symptoms are neither specific nor diagnostic for COVID-19. Symptom overlap between COVID-19 and some other conditions may lead other diseases to be missed and underdiagnosed. Just like COVID-19, pulmonary thromboembolism (PTE) and pulmonary infarction may present with fever and respiratory symptoms. Since COVID-19 emerged and spread worldwide, many clinicians are focused on diagnosis and treatment of this novel viral infection. Hence, other diseases presenting with the same symptoms as COVID-19 may remain underdiagnosed. Here, we report three cases of PTE and pulmonary infarction presenting with fever and respiratory symptoms mimicking COVID-19.
PubMed: 33244523
DOI: No ID Found -
European Heart Journal Supplements :... Nov 2020Albeit largely underappreciated, chronic obstructive pulmonary disease (COPD) constitutes a major risk factor for cardiovascular diseases in general and for coronary...
Albeit largely underappreciated, chronic obstructive pulmonary disease (COPD) constitutes a major risk factor for cardiovascular diseases in general and for coronary disease in particular. The incidence of myocardial infarction, in fact increases rapidly, after relapse of COPD, with a peak event rate during the first week in the worst forms (those requiring hospitalization). Even though the precise mechanism is not completely defined, it is likely derived from two pathogenetic causes: (i) mismatch between myocardial demand and offer of O (not fully demonstrated and limited to few cases); (ii) acute coronary thrombosis, probably due to a systemic inflammatory reaction, brought upon by multiple interaction between the infective agent and the host immune system.
PubMed: 33239991
DOI: 10.1093/eurheartj/suaa156 -
Tuberkuloz Ve Toraks Sep 2020Behcet's disease is a chronic inflammatory multi-systemic vasculitis. Recurrent oral and genital aphthous ulcers, uveitis, arthritis, arterial aneurysms, venous...
Behcet's disease is a chronic inflammatory multi-systemic vasculitis. Recurrent oral and genital aphthous ulcers, uveitis, arthritis, arterial aneurysms, venous thrombosis, gastrointestinal system lesions and skin lesions can be seen. Large, medium or small arteries and veins may be involved. While venous lesions cause occlusion, arterial lesions can cause both occlusion and aneurysm. Major forms of pulmonary involvement include pulmonary artery aneurysm, arterial and venous thrombosis, pulmonary infarction, recurrent pneumonia, and pleurisy. In Behcet's disease, pulmonary thromboembolism (PE) is often associated with endothelial damage. Neutrophils play an important role in the pathogenesis of thrombosis. Coagulation components such as fibrinogen, thrombin, factor Xa and factor VIIa activate the inflammatory cascade and induce vascular events. It is important to understand the pathogenesis of vascular events in determining the effective treatment strategy. Here we present a patient with Behcet's disease who was presented with pulmonary embolism and was investigated for the etiology of thrombosis.
Topics: Behcet Syndrome; Humans; Male; Middle Aged; Pulmonary Artery; Pulmonary Embolism; Tomography, X-Ray Computed; Ultrasonography, Doppler; Venous Thrombosis
PubMed: 33295733
DOI: 10.5578/tt.69502