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I am 27 years old unmarried my E C G report is showing SINUS arrhythmia / NO ST. T CHANGES. What does it mean please explain.
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Sinus arrhythmia is a normal physiological phenomenon, most commnonly seen in young, healthy people. The heart rate varies due to reflex changes in vagal tone during the different stages of the respiratory cycle. Inspiration increases the heart rate by decreasing vagal tone. With the onset of expiration, vagal tone is restored, leading to a subsequent decrease in heart rate. The incidence of sinus arrhythmia decreases with age, presumably due to age-related decreases in carotid distensibility and baroreceptor reflex sensitivity.
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