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Ajibare AO, Olabode OP, Fagbemiro EY, Akinlade OM, Akintunde AA, Akinpelu OO, Olatunji LA, Soladoye AO, Opadijo OG. Assessment of Ventricular Repolarization in Sickle Cell Anemia Patients: The Role of QTc Interval, Tp-e Interval and Tp-e/QTc Ratio and Its Gender Implication. Vasc Health Risk Manag 2020; 16:525-533. [PMID: 33324066 PMCID: PMC7733033 DOI: 10.2147/vhrm.s259766] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 10/01/2020] [Indexed: 12/21/2022] Open
Abstract
Background Many specific and non-specific electrocardiographic abnormalities including ventricular arrhythmias have been reported in subjects with sickle cell anemia (SCA). In SCA patients, cardiac electrical abnormalities may be the leading cause of increased risk of arrhythmias. The corrected QT (QTc) interval, peak to the end of the T wave (Tp-e) interval and associated Tp-e/QTc ratio are promising measures of altered ventricular repolarization and increased arrhythmogenesis risk. Aim This study assessed ventricular repolarization abnormalities in subjects with SCA using the QTc interval, Tp-e interval and Tp-e/QTc ratio, and also evaluated the gender differences in these parameters, as well as their determinants. Methods Sixty subjects with SCA and 60 healthy control subjects, matched for age and gender, were studied. All participants underwent physical examination, hematological and biochemical evaluation, and 12-lead electrocardiography (ECG) recording. QT and Tp-e intervals were measured from the ECG, and the QTc interval was calculated using Bazett’s formula. Tp-e/QT and Tp-e/QTc ratios were also derived. Results QT and QTc intervals were prolonged in subjects with SCA. Tp-e interval, Tp-e/QT ratio and Tp-e/QTc ratio were prolonged in male SCA subjects, with a paradoxical shortening in female SCA subjects. Plasminogen activator inhibitor-1 (PAI-1) was an independent determinant of QTc, while body mass index (BMI) was an independent determinant of both Tp-e interval and Tp-e/QTc ratio. Conclusion Our results suggest an elevated risk for ventricular arrhythmogenesis in male SCA subjects. Furthermore, increased BMI and PAI-1 level are possible markers of ventricular repolarization abnormalities in SCA subjects.
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Korur A, Kozanoglu I, Buyukkurt N, Yeral M, Kandemir F, Gereklioglu C, Sariturk C, Asma S, Solmaz S, Boga C, Ozdogu H. QTc prolongation during peripheral stem cell apheresis in healthy volunteers. J Clin Apher 2016; 32:240-245. [PMID: 27543914 DOI: 10.1002/jca.21504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/14/2016] [Accepted: 08/10/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND AIM Today, voluntary donation of peripheral blood stem cells by healthy donors for allogeneic hemopoietic cell transplantation is common worldwide. Such donations are associated with small but measurable risks of morbidity and mortality. Most complications are associated with citrate infusion during cell collection. We studied the effects of citrate infusion on the QTc and other vital parameters during and after peripheral stem cell apheresis in volunteers. METHOD To ensure that donors were healthy, screening included taking a detailed medical history, physical examination, and laboratory measurements of plasma calcium and magnesium. Corrected QT (QTc) values were assessed using a 12-lead electrocardiographic platform that derived QTc values automatically. RESULTS In all, 141 apheresis procedures were performed. The mean QTc values at baseline, at 2 and 4 h during the procedure, and at 30 min after the procedure, were 347.6 ± 59.5, 349.9 ± 52.8, 391.8 ± 54.0, and 404.8 ± 59.2 ms, respectively. The baseline and 2 h QTcs did not differ significantly, but the baseline QTc did differ significantly from the 4 h and 30 min after the procedure values. The plasma levels of calcium and magnesium did not significantly differ before and after the procedure. CONCLUSION QTc prolongation may develop during leukopheresis, particularly if the procedure takes more than 2 h. Thus, to enhance donor safety, QTc measurement should be standard for all donors. In addition, any family history of sudden death should be noted, to prevent the development of possible fatal arrhythmia in susceptible donors.
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Affiliation(s)
- Aslı Korur
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit.,Department of Family Medicine, Baskent University Medical Faculty
| | - Ilknur Kozanoglu
- Baskent University Adana Adult Bone Marrow Transplantation Center Apheresis and Cell Collecting Unit.,Department of Physiology, Baskent University Medical Faculty
| | - Nurhilal Buyukkurt
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit
| | - Mahmut Yeral
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit
| | - Fatih Kandemir
- Baskent University Adana Adult Bone Marrow Transplantation Center Apheresis and Cell Collecting Unit
| | - Cigdem Gereklioglu
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit.,Department of Family Medicine, Baskent University Medical Faculty
| | | | - Suheyl Asma
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit.,Department of Family Medicine, Baskent University Medical Faculty
| | - Soner Solmaz
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit
| | - Can Boga
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit
| | - Hakan Ozdogu
- Baskent University Adana Adult Bone Marrow Transplantation Center Clinical Unit
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Asma S, Kozanoglu I, Tarım E, Sarıturk C, Gereklioglu C, Akdeniz A, Kasar M, Turgut NH, Yeral M, Kandemir F, Boga C, Ozdogu H. Prophylactic red blood cell exchange may be beneficial in the management of sickle cell disease in pregnancy. Transfusion 2014; 55:36-44. [DOI: 10.1111/trf.12780] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 05/28/2014] [Accepted: 05/28/2014] [Indexed: 02/06/2023]
Affiliation(s)
- Suheyl Asma
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
- Department of Family Medicine; Baskent University Medical Faculty; Ankara Turkey
| | - Ilknur Kozanoglu
- Cell Collecting and Therapeutic Apheresis Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
- Department of Physiology; Baskent University Medical Faculty; Ankara Turkey
| | - Ebru Tarım
- Department of Obstetrics and Gynecology; Baskent University Medical Faculty; Ankara Turkey
| | - Cagla Sarıturk
- Biostatistics Specialist; Baskent University Adana Hospital; Ankara Turkey
| | - Cigdem Gereklioglu
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
- Department of Family Medicine; Baskent University Medical Faculty; Ankara Turkey
| | - Aydan Akdeniz
- Department of Hematology; Mersin University Medical Faculty; Mersin Turkey
| | - Mutlu Kasar
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
| | - Nurhilal H. Turgut
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
| | - Mahmut Yeral
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
| | - Fatih Kandemir
- Department of Family Medicine; Baskent University Medical Faculty; Ankara Turkey
| | - Can Boga
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
| | - Hakan Ozdogu
- Clinical Unit; Baskent University Adana Adult Bone Marrow Transplantation Center; Ankara Turkey
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Kolo PM, Sanya EO, Olanrewaju TO, Fawibe AE, Soladoye A. Cardiac autonomic dysfunction in sickle cell anaemia and its correlation with QT parameters. Niger Med J 2014; 54:382-5. [PMID: 24665151 PMCID: PMC3948959 DOI: 10.4103/0300-1652.126288] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Abnormalities of QT parameters together with cardiac autonomic neuropathy (CAN) confer significant risks of cardiac morbidity and mortality in patients with diabetes mellitus. We questioned whether or not CAN influences occurrence of QT interval prolongation and dispersion in patients with sickle cell anaemia (SCA). Materials and Methods: Forty stable adult sickle cell patients with 44 healthy haemoglobin AA controls were studied. Baseline electrocardiograms were obtained and cardiovascular autonomic function tests were performed using standard protocols. Results: Mean corrected QT (QTc) in sickle cell patients was significantly higher (P = 0.001) than the mean of controls. Similarly, mean QT dispersion (QTcd) was higher (P = 0.001) in the former than in the latter. Mean QTc in patients with CAN was longer than patients with normal autonomic function (461 ± 26 ms versus 411 ± 23 ms), P = 0.001 (OR of 17.1, CI 3.48–83.71). Similarly, QTcd was higher (P = 0.001) in patients with CAN than those with normal cardiac autonomic function. Positive correlations were found between CAN with QTc and QTcd (r = 0.604, P = 0.001, r = 0.523, P = 0.001, respectively). Conclusion: CAN is a risk factor for abnormalities of QT parameters in SCA and both may be harbinger for cardiac death.
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Gomez E, Morris CR. Asthma management in sickle cell disease. BIOMED RESEARCH INTERNATIONAL 2013; 2013:604140. [PMID: 24324967 PMCID: PMC3842053 DOI: 10.1155/2013/604140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 09/05/2013] [Accepted: 09/13/2013] [Indexed: 01/19/2023]
Abstract
Asthma is a common comorbid factor in sickle cell disease (SCD). However, the incidence of asthma in SCD is much higher than expected compared to rates in the general population. Whether "asthma" in SCD is purely related to genetic and environmental factors or rather is the consequence of the underlying hemolytic and inflammatory state is a topic of recent debate. Regardless of the etiology, hypoxemia induced by bronchoconstriction and inflammation associated with asthma exacerbations will contribute to a cycle of sickling and subsequent complications of SCD. Recent studies confirm that asthma predisposes to complications of SCD such as pain crises, acute chest syndrome, and stroke and is associated with increased mortality. Early recognition and aggressive standard of care management of asthma may prevent serious pulmonary complications and reduce mortality. However, data regarding the management of asthma in SCD is very limited. Clinical trials are needed to evaluate the effectiveness of current asthma therapy in patients with SCD and coincident asthma, while mechanistic studies are needed to delineate the underlying pathophysiology.
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Affiliation(s)
- Esteban Gomez
- Department of Hematology-Oncology, Children's Hospital & Research Center Oakland, Oakland, CA 94609, USA
| | - Claudia R. Morris
- Division of Pediatric Emergency Medicine, Department of Pediatrics, Emory University School of Medicine, 1645 Tullie Circle, NE, Atlanta, GA 30329, USA
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Liem RI, Young LT, Thompson AA. Prolonged QTc interval in children and young adults with sickle cell disease at steady state. Pediatr Blood Cancer 2009; 52:842-6. [PMID: 19229972 DOI: 10.1002/pbc.21973] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Prolongation of the QTc interval may be more common than previously believed among individuals with sickle cell disease (SCD). The clinical associations and natural history of QTc prolongation remain unclear in this population. Our objectives were to determine the prevalence of prolonged QTc and evaluate its relationship to clinical factors in children and young adults with SCD. PROCEDURES We analyzed data from subjects 10 to 25 years old with SCD enrolled in our pulmonary hypertension screening protocol. Screening included echocardiography (ECHO), 12-lead electrocardiogram (ECG) and laboratory testing at steady state. QTc interval >440 msec was considered prolonged. RESULTS ECG data from 76 subjects (57% male, mean age 14.2 +/- 3 years old, range 10-24) were analyzed. We observed prolonged QTc in 29/76 (38%) subjects. Despite evidence of left ventricular hypertrophy (LVH) in 50/76 (66%) subjects, the frequency of LVH was not significantly different in subjects with and without QTc prolongation. When compared to subjects with normal QTc, subjects with prolonged QTc had higher mean tricuspid regurgitant jet velocity (2.51 +/- 0.27 m/sec vs. 2.33 +/- 0.26 m/sec, P = 0.010) as well as higher mean lactate dehydrogenase (433 +/- 142 IU/L vs. 343 +/- 142 IU/L, P = 0.000) and aspartate aminotransferase (48 +/- 20 IU/L vs. 39 +/- 15 IU/L, P = 0.026). A larger proportion of subjects with prolonged QTc also had a history of recurrent acute chest syndrome (66% vs. 38%, P = 0.038). CONCLUSIONS We conclude that QTc prolongation is a frequent finding in SCD not associated with LVH. Elevated pulmonary pressures, hemolysis and acute chest syndrome may represent risk factors for prolonged QTc in this population.
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Affiliation(s)
- Robert I Liem
- Division of Hematology, Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
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Abstract
Asthma is a common comorbidity in sickle cell disease (SCD) with a reported prevalence of 30-70%. The high frequency of asthma in this population cannot be attributed to genetic predisposition alone, and likely reflects in part, the contribution of overlapping mechanisms shared between these otherwise distinct disorders. There is accumulating evidence that dysregulated arginine metabolism and in particular, elevated arginase activity contributes to pulmonary complications in SCD. Derangements of arginine metabolism are also emerging as newly appreciated mechanism in both asthma and pulmonary hypertension independent of SCD. Patients with SCD may potentially be at risk for an asthma-like condition triggered or worsened by hemolysis-driven release of erythrocyte arginase and low nitric oxide bioavailability, in addition to classic familial asthma. Mechanisms that contributed to asthma are complex and multifactorial, influenced by genetic polymorphisms as well as environmental and infectious triggers. Given the association of asthma with inflammation, oxidative stress and hypoxemia, factors known to contribute to a vasculopathy in SCD, and the consequences of these factors on sickle erythrocytes, comorbid asthma would likely contribute to a vicious cycle of sickling and subsequent complications of SCD. Indeed a growing body of evidence documents what should come as no surprise: Asthma in SCD is associated with acute chest syndrome, stroke, pulmonary hypertension, and early mortality, and should therefore be aggressively managed based on established National Institutes of Health Guidelines for asthma management. Barriers to appropriate asthma management in SCD are discussed as well as strategies to overcome these obstacles in order to provide optimal care.
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Affiliation(s)
- Claudia R Morris
- Department of Emergency Medicine, Children's Hospital and Research Center Oakland, Oakland, California 94609, USA.
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