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Document Type |
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Article In Journal |
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Document Title |
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Effect of Ramadan on Heart Rate Variability Effect of Ramadan on Heart Rate Variability |
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Document Language |
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English |
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Abstract |
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Background: During the month of Ramadan, Muslims worldwide abstain from food and drinks from dawn to sunset.
Aim of the Work: This study aimed to evaluate the modulation of the autonomic nerves on the cardiac activity, reflected by heart rate variability, during Ramdan fasting compared to the fed state both in obese and non – obese subjects.
Subjects and Methods: A sample 54 healthy volunteers, 17 obese and 37 non – obese, aged 21 + 3 years were selected. Heart rate variability analysis was assessed by ECG recording, using Power Lab acquisition system. The first ECG recording session was done between the 10th and 20th day of Ramadan 1428 Hijrah and the second recording session done 14 + 6 weeks after Ramadan. The ECG recording through the Power Lab system was examined for heart rate, time domain parameters, as well as frequency domain parameters. Time domain parameters included both Standard Deviation of all Normal to Normal beats (SDNN) and root Mean Square of Successive Difference (rMSSD) and the frequency domain parameters included: Total Power (TP), very Low Frequency (vLF), Low Frequency (LF), High Frequency (HF) and low frequency to high frequency ratio (LF/HF).
Results: The non – obese subjects showed a significant decrease in the heart rate compared to the fed state after Ramadan. The LF/HF ratio showed a borderline significant decrease compared to their corresponding values after Ramadan (0.05 < P< 0.1). The decrease in the LF/HF was accompanied by insignificant decrease in the LF waves, indicative of the sympathetic activity. The results of the obese subjects group showed insignificant decrease in the heart rate compared to their corresponding values in the fed state after Ramadan. The frequency domain parameter showed an insignificant decrease in the low frequency waves, indicative of the sympathetic activity, as well as an insignificant increase in the high frequency waves, indicative of the parasympathetic activity, in response to Ramadan fasting compared to fed state after Ramadan. These changes resulted in a significant decrease in the LF/HF ratio P < 0.05 in the fasting state compared to the fed state after Ramadan.
Conclusion: Fasting Ramadan decrease heart rate and improved HRV, this improvement was more obvious in the obese subjects group. |
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ISSN |
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0379-5284 |
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Journal Name |
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Scientific Medical Journal |
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Volume |
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21 |
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Issue Number |
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2 |
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Publishing Year |
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2009 AH
2009 AD |
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Article Type |
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Article |
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Added Date |
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Monday, March 15, 2010 |
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Researchers
| حسام عوض | Awad, Hosam | Researcher | Doctorate | |
| عبدالرحمن فهمي | Fahmi, Abdulrahman | Researcher | Doctorate | |
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