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Nalos L, Jarkovská D, Švíglerová J, Süß A, Záleský J, Rajdl D, Krejčová M, Kuncová J, Rosenberg J, Štengl M. TdP Incidence in Methoxamine-Sensitized Rabbit Model Is Reduced With Age but Not Influenced by Hypercholesterolemia. Front Physiol 2021; 12:692921. [PMID: 34234694 PMCID: PMC8255784 DOI: 10.3389/fphys.2021.692921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 05/17/2021] [Indexed: 11/13/2022] Open
Abstract
Metabolic syndrome is associated with hypercholesterolemia, cardiac remodeling, and increased susceptibility to ventricular arrhythmias. Effects of diet-induced hypercholesterolemia on susceptibility to torsades de pointes arrhythmias (TdP) together with potential indicators of arrhythmic risk were investigated in three experimental groups of Carlsson's rabbit model: (1) young rabbits (YC, young control, age 12-16 weeks), older rabbits (AC, adult control, age 20-24 weeks), and older age-matched cholesterol-fed rabbits (CH, cholesterol, age 20-24 weeks). TdP was induced by α-adrenergic stimulation by methoxamine and IKr block in 83% of YC rabbits, 18% of AC rabbits, and 21% of CH rabbits. High incidence of TdP was associated with high incidence of single (SEB) and multiple ectopic beats (MEB), but the QTc prolongation and short-term variability (STV) were similar in all three groups. In TdP-susceptible rabbits, STV was significantly higher compared with arrhythmia-free rabbits but not with rabbits with other than TdP arrhythmias (SEB, MEB). Amplitude-aware permutation entropy analysis of baseline ECG could identify arrhythmia-resistant animals with high sensitivity and specificity. The data indicate that the TdP susceptibility in methoxamine-sensitized rabbits is affected by the age of rabbits but probably not by hypercholesterolemia. Entropy analysis could potentially stratify the arrhythmic risk and identify the low-risk individuals.
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Affiliation(s)
- Lukáš Nalos
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia.,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Dagmar Jarkovská
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia.,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Jitka Švíglerová
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia.,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Annabell Süß
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Jakub Záleský
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Daniel Rajdl
- Institute of Clinical Biochemistry and Haematology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Milada Krejčová
- New Technologies for the Information Society, Faculty of Applied Sciences, University of West Bohemia, Pilsen, Czechia
| | - Jitka Kuncová
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia.,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Josef Rosenberg
- New Technologies for the Information Society, Faculty of Applied Sciences, University of West Bohemia, Pilsen, Czechia
| | - Milan Štengl
- Department of Physiology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia.,Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
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Al-Nimer MS, Esmail VA, Hamid DS, Mohammad MO. A preliminary report about the detection of ventricular repolarisation in patients with non-alcoholic fatty liver disease. J Taibah Univ Med Sci 2020; 15:284-291. [PMID: 32982631 PMCID: PMC7479166 DOI: 10.1016/j.jtumed.2020.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/09/2020] [Accepted: 05/13/2020] [Indexed: 11/24/2022] Open
Abstract
Objectives Non-alcoholic fatty liver disease (NAFLD) is a multisystem disease which can affect the cardiovascular system as well. We conducted this study to determine the cardiac effects of NAFLD such as conduction of impulse and ventricular repolarisation on electrocardiography (ECG). Methods In this study, we recruited patients with risk factors for NAFLD (group I; n = 23) and NAFLD patients (group II; n = 74) from Shar Hospital in Sulaimani City, Iraq. We analysed anthropometric measurements, serum fasting lipid profile, glucose levels, liver enzymes, and ECG recordings. Results ECG recordings showed significantly longer PR intervals, significantly shorter QTcB and JTc intervals, and a higher Tp-e/QTcB ratio in group II patients than in group I patients. These abnormalities were not associated with risk factors for diabetes. The TQ duration was significantly correlated with serum alanine aminotransferase (r = 0.411, p < 0.001) and aspartate aminotransferase (r = 0.272, p = 0.019) levels. Conclusion In our study, the presence of significant abnormalities in ventricular repolarisation suggests that patients with newly diagnosed NAFLD have subclinical cardiac stress and a higher risk of ventricular arrhythmias. Non-alcoholic fatty liver disease patients are at risk of developing ventricular repolarization. Abnormal electrocardiograph changes are related to the serum levels of liver enzymes. People at risk of developing non-alcoholic liver disease are also have abnormal ventricular repolarization indices.
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Affiliation(s)
- Marwan S Al-Nimer
- Department of Pharmacology and Toxicology, College of Pharmacy, Hawler Medical University, Erbil, Iraq
| | - Vian A Esmail
- Department of Clinical Pharmacy, College of Pharmacy, University of Sulaimani, Sulaimani, Iraq
| | - Dler S Hamid
- Department of Medicine, College of Medicine, University of Sulaimani, Sulaimani, Iraq
| | - Mohammad O Mohammad
- Department of Medicine, College of Medicine, University of Sulaimani, Sulaimani, Iraq
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