Why the study?
Low serum thyrotropin levels are an independent risk factor for AF, but the frequency of hyperthyroidism in patients with AF remains unknown.
Hyperthyroidism is present in approximately 8.4% of patients presenting with atrial fibrillation, supporting the routine checking of TSH levels in new-onset AF.
May warrant TSH evaluation in new-onset AF; leaves open whether routine screening improves outcomes.
Background: Hyperthyroidism causes a rise in cardiovascular disease and dysrhythmias, leading to increased mortality. Low serum thyrotropin levels are a known independent risk factor for atrial fibrillation (AF). The frequency of hyperthyroidism in patients with AF is still unknown. Objectives: To determine the prevalence of hyperthyroidism in patients with AF admitted to a tertiary care hospital in Peshawar. Methodology: This was a cross sectional observational study that included 155 patients with AF. The study was conducted in the cardiology department of a tertiary care hospital in Peshawar, Pakistan, from December 2019 to May 2020. Results: Hyperthyroidism was found in 13(8.39%) patients with atrial fibrillation, while 142(91.61%) patients were without hyperthyroidism. There were 94 (60.65%) males and 61(39.35%) females. The ratio of male to female was 1.6: 1. The mean age of the patients enrolled was 50.35 years+14.95SD, with a range of 18-75 years. Patients were divided into three age groups, and atrial fibrillation was common in the 41-60 (years) age group. Conclusion: Hyperthyroidism is a recognized cause of atrial fibrillation. Every new-onset atrial fibrillation should be investigated with serum TSH levels. It can result in cerebral embolic episodes, particularly in the elderly and people with other risk factors.
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Ullah et al. (2022) studied this question.
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