Publications by authors named "Sadettin Kamat"

5 Publications

  • Page 1 of 1

Assessment of Subclinical Left Ventricular Systolic Dysfunction and Structural Changes in Patients with Chronic Obstructive Pulmonary Disease.

Intern Med J 2021 Jun 17. Epub 2021 Jun 17.

Department of Cardiology, Istanbul Florence Nightingale Hospital, Istanbul, Turkey.

Background: Patients with chronic obstructive pulmonary disease (COPD) can develop left ventricular (LV) systolic dysfunction and geometric changes due to several reasons. We investigated subclinical LV systolic dysfunction and structural features in patients with COPD, and its correlation with the severity of airway obstruction, identified by GOLD classification.

Methods: We studied 52 patients with COPD and 29 age and sex-matched controls, without any cardiac disease. In addition to conventional echocardiographic evaluation speckle tracking echocardiography (STE) based strain imaging were performed to analyze sub-clinical LV systolic dysfunction. Also LV volumes were measured by using three dimensional real time echocardiography (3DRTE). All patients underwent spirometry.

Results: Conventional echocardiographic parameters (LV wall thickness and diameters, LV EF) and LV volume measurements were similar between the groups. LV global longitudinal peak systolic strain (-14.76 ± 2.69% to -20.27 ± 1.41%, p < 0.001) and strain rate (0.75 ± 0.25 1/s to 1.31 ± 0.41 1/s, p < 0.001) were significantly impaired in patients, compared to controls demonstrating sub-clinical ventricular systolic dysfunction. Significant positive correlation was obtained between LV strain/strain rate and spirometry parameters (FEV 1, FEV%, FEV 1/ FVC, PEF %) (r = 0.78/0,68, p < 0.001; r = 0,83/0.70, p < 0.001); r = 0.74/0.55, p < 0.001; r = 0.72/0.65, p < 0.001, respectively). In addition, there was significant negative correlation between LV strain/strain rate and GOLD classification (r = -0.80/ -0.69, p < 0.001, respectively).

Conclusion: Subclinical LV systolic dysfunction can occur in COPD patients despite normal EF. STE is a technique that provides additional information for detailed evaluation of subtle changes in LV myocardial contractility, significantly associated with the severity of the disease in COPD patients. This article is protected by copyright. All rights reserved.
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June 2021

Cytokine storm in severe COVID-19 pneumonia.

J Med Virol 2021 May 8. Epub 2021 May 8.

Department of Dermatology, Gaziosmanpasa Research and Training Hospital, University of Health Sciences, Istanbul, Turkey.

In this study, laboratorial parameters of hospitalized novel coronavirus (COVID-19) patients, who were complicated with severe pneumonia, were compared with the findings of cytokine storm developing in macrophage activation syndrome (MAS)/secondary hemophagocytic lymphohistiocytosis (sHLH). Severe pneumonia occurred as a result of cytokine storm in some patients who needed intensive care unit (ICU), and it is aimed to determine the precursive parameters in this situation. Also in this study, the aim is to identify laboratory criteria that predict worsening disease and ICU intensification, as well as the development of cytokine storm. This article comprises a retrospective cohort study of patients admitted to a single institution with COVID-19 pneumonia. This study includes 150 confirmed COVID-19 patients with severe pneumonia. When they were considered as severe pneumonia patients, the clinic and laboratory parameters of this group are compared with H-score criteria. Patients are divided into two subgroups; patients with worsened symptoms who were transferred into tertiary ICU, and patients with stable symptoms followed in the clinic. For the patients with confirmed COVID-19 infection, after they become complicated with severe pneumonia, lymphocytopenia (55.3%), anemia (12.0%), thrombocytopenia (19.3%), hyperferritinemia (72.5%), hyperfibrinogenemia (63.7%) and elevated lactate dehydrogenase (LDH) (90.8%), aspartate aminotransaminase (AST) (31.3%), alanine aminotransaminase (ALT) (20.7%) are detected. There were no significant changes in other parameters. Blood parameters between the pre-ICU period and the ICU period (in which their situation had been worsened and acute respiratory distress syndrome [ARDS] was developed) were also compared. In the latter group lymphocyte levels were found significantly reduced (p = 0.01), and LDH, highly sensitive troponin (hs-troponin), procalcitonin, and triglyceride levels were significantly increased (p < 0.05). In addition, there was no change in hemoglobin, leukocyte, platelet, ferritin, and liver function test levels, including patients who developed ARDS, similar to the cytokine storm developed in MAS/sHLH. COVID-19 pneumonia has similar findings as hyperinflammatory syndromes but does not seem to have typical features as in cytokine storm developed in MAS/sHLH. In the severe patient group who has started to develop ARDS signs, a decrease in lymphocyte level in addition to the elevated LDH, hs-troponin, procalcitonin, and triglyceride levels can be a predictor in progression to ICU admission and could help in the planning of anti-cytokine therapy.
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May 2021

Clinical characteristics of adult patients hospitalized with laboratory-confirmed COVID-19 pneumonia.

J Infect Chemother 2021 Feb 23;27(2):306-311. Epub 2020 Oct 23.

Anesthesia and Reanimation, Istanbul Gaziosmanpasa Training and Research Hospital, Istanbul, Turkey.

Background: The clinical spectrum of COVID-19 has a great variation from asymptomatic infection to acute respiratory distress syndrome and eventually death. The mortality rates vary across the countries probably due to the heterogeneity in study characteristics and patient cohorts as well as treatment strategies. Therefore, we aimed to summarize the clinical characteristics and outcomes of adult patients hospitalized with laboratory-confirmed COVID-19 pneumonia in Istanbul, Turkey.

Methods: A total of 722 adult patients with laboratory-confirmed COVID-19 pneumonia were analyzed in this single-center retrospective study between March 15 and May 1, 2020.

Results: A total of 722 laboratory-confirmed patients with COVID-19 pneumonia were included in the study. There were 235 (32.5%) elderly patients and 487 (67.5%) non-elderly patients. The most common comorbidities were hypertension (251 [34.8%]), diabetes mellitus (198 [27.4%]), and ischemic heart disease (66 [9.1%]). The most common symptoms were cough (512 [70.9%]), followed by fever (226 [31.3%]), and shortness of breath (201 [27.8%]). Lymphocytopenia was present in 29.7% of the patients, leukopenia in 12.2%, and elevated CRP in 48.8%. By the end of May 20, 648 (89.7%) patients had been discharged and 60 (8.5%) patients had died. According to our study, while our overall mortality rate was 8.5%, this rate was 14.5% in elderly patients, and the difference was significant.

Conclusions: This case series provides characteristics and outcomes of sequentially adult patients hospitalized with laboratory-confirmed COVID-19 pneumonia in Turkey.
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February 2021

Performance of pneumonia severity index and CURB-65 in predicting 30-day mortality in patients with COVID-19.

Int J Infect Dis 2020 Sep 14;98:84-89. Epub 2020 Jun 14.

Department of Rheumatology, Gaziosmanpasa Research and Training Hospital, University of Health Sciences, Istanbul, Turkey. Electronic address:

Objective: The aim of the study was to analyze the usefulness of CURB-65 and the pneumonia severity index (PSI) in predicting 30-day mortality in patients with COVID-19, and to identify other factors associated with higher mortality.

Methods: A retrospective study was performed in a pandemic hospital in Istanbul, Turkey, which included 681 laboratory-confirmed patients with COVID-19. Data on characteristics, vital signs, and laboratory parameters were recorded from electronic medical records. Receiver operating characteristic analysis was used to quantify the discriminatory abilities of the prognostic scales. Univariate and multivariate logistic regression analyses were performed to identify other predictors of mortality.

Results: Higher CRP levels were associated with an increased risk for mortality (OR: 1.015, 95% CI: 1.008-1.021; p < 0.001). The PSI performed significantly better than CURB-65 (AUC: 0.91, 95% CI: 0.88-0.93 vs AUC: 0.88, 95% CI: 0.85-0.90; p = 0.01), and the addition of CRP levels to PSI did not improve the performance of PSI in predicting mortality (AUC: 0.91, 95% CI: 0.88-0.93 vs AUC: 0.92, 95% CI: 0.89-0.94; p = 0.29).

Conclusion: In a large group of hospitalized patients with COVID-19, we found that PSI performed better than CURB-65 in predicting mortality. Adding CRP levels to PSI did not improve the 30-day mortality prediction.
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September 2020

Clinical effects of cognitive impairment in patients with chronic obstructive pulmonary disease.

Chron Respir Dis 2018 08 23;15(3):306-314. Epub 2017 Nov 23.

1 Department of Pulmonology, Yedikule Chest Disease and Thoracic Surgery Training Hospital, University of Health Sciences, İstanbul, Turkey.

The aim of this study was to evaluate the clinical effects of cognitive impairment in patients with chronic obstructive pulmonary disease (COPD). A total of 91 patients with stable moderate to very severe COPD were included in this study. Cognitive functions of the patients were evaluated using the mini-mental state examination (MMSE) tool and clock-drawing test. The Brody's Instrumental Activities of Daily Living (IADL) Questionnaire; COPD assessment test (CAT); body mass index, airflow obstruction, dyspnea, and exercise capacity (BODE); and Charlson comorbidity index were assessed. The patients were divided into two groups as those who were diagnosed with cognitive impairment (group 1, n = 16) and those with normal cognitive functions (group 2, n = 75). Group 1 had a lower arterial partial pressure of oxygen , shorter 6-min walking distance, and higher arterial partial pressure of carbon dioxide (PaCO) than group 2 ( p = 0.01, p = 0.024, p = 0.018, respectively). In group 1, the IADL score was lower, and CAT and BODE scores were higher than group 2 ( p = 0.002, p = 0.037, p = 0.012, respectively). When we considered all the patients, there was an independent correlation between the IADL score and MMSE score ( p = 0.03). This study revealed that COPD patients with cognitive impairment may have more hypoxemia and limited activities of daily living.
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August 2018