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The impact of diurnal fasting during Ramadan on the lipid profile, hs-CRP, and serum leptin in stable cardiac patients

Authors Khafaji HARH, Bener A, Osman M, Al Merri A, Al Suwaidi J

Published 30 December 2011 Volume 2012:8 Pages 7—14

DOI https://doi.org/10.2147/VHRM.S22894

Review by Single-blind

Peer reviewer comments 2

Hadi Abdul Ridha Hadi Khafaji1, Abdulbari Bener2, Mohammed Osman3, Ajayeb Al Merri4, Jassim Al Suwaidi1
1Department of Cardiology and Cardiovascular Surgery, 2Department of Medical Statistics and Epidemiology, Hamad General Hospital, Hamad Medical Corporation, Doha, State of Qatar; 3Department of Biochemistry, 4Department of Serology, Hamad Medical Corporation, Doha, State of Qatar

Aim: To study the effect of strict prolonged fasting on lipid profile, serum leptin, and high-sensitivity C-reactive protein (hs-CRP) in patients with different stable cardiac illnesses and look for associated new cardiac events and any correlation between entire variables.
Methods: A total of 56 patients of different stable cardiac illnesses were followed in our cardiology outpatient for 3 months. Data concerning their ability to fast were collected: New York Heart Association class of congestive cardiac failure, angina class, previous myocardial infarction, previous coronary artery bypass graft, percutaneous coronary intervention, severity of valvular lesion, metallic prosthetic valve, and traditional risk factors (diabetes mellitus, insulin requirement, hypertension, hypercholesterolemia, smoking habit, and obesity). Detailed clinical examination and electrocardiography were performed in all patients in three consecutive visits before, during, and after Ramadan. Echocardiographic and angiographic findings and medication plans were collected from patient records. Lipid profile, serum leptin, and hs-CRP were assessed before, during, and after Ramadan.
Results: All patients fasted during Ramadan: 80.4% were male, 67.9% were aged >50 years, 71.4% had no change in their symptoms during fasting while 28.6% felt better. No patient has deteriorated. 91.1% of the patients were compliant with medicine during Ramadan, 73.2% after. 89.3% were compliant with diet during Ramadan with no significant change in body weight in the follow-up period. No cardiac or noncardiac morbidity or mortality was reported. High-density lipoprotein-cholesterol (HDL-C) decreased significantly during compared to before fasting (P = 0.012). Low-density lipoprotein-cholesterol (LDL-C) significantly increased during compared to before fasting (P = 0.022). No statistically significant changes were observed in total cholesterol (TC), triglycerides (TG), serum leptin, or hs-CRP. Significant correlation was observed between TC and hs-CRP during fasting (P = 0.036), but not with TG, LDL-C, or HDL-C (P > 0.05). Neither of these correlated with serum leptin (P > 0.05), but significant correlation was observed between hs-CRP and serum leptin (P < 0.05).
Conclusion: Ramadan fasting in stable cardiac patients has no effect on their clinical status, serum leptin, or hs-CRP, but results in decrease in HDL-C, increase in LDL-C, with significant correlation between TC and hs-CRP during Ramadan, but not with TG, LDL-C, or HDL-C, and with significant correlation between hs-CRP and serum leptin before, during, and after fasting.

Keywords: serum leptin, hs-C-reactive protein, lipid profile, cardiac disease, Ramadan fasting

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