Key result
Decreased serum TSH levels were associated with an increased risk of short QTc compared to normal TSH levels (OR 1.53; 95% CI 1.16-2.03).
Why the study?
Are decreased serum TSH levels associated with shorter rate-adjusted QT intervals in the general population?
Population
3,610 adults aged 20-79 years without bundle branch blocks or pacemakers from the population-based Study of…
Comparison
Decreased serum TSH levels vs Normal serum TSH levels
Design
Cross-sectional
Authors
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Low TSH may link to short QTc observationally; hypothesis-generating and should not change practice without prospective data.
Observational (n=3,610)
Are decreased serum TSH levels associated with shorter rate-adjusted QT intervals in the general population?
Odds Ratio: 1.53 (95% CI 1.16–2.03)
p-value: p=0.008
Decreased serum TSH levels are independently associated with shorter rate-adjusted QT intervals, suggesting a potential link between thyroid dysfunction and altered ventricular repolarization.
Dörr et al. (2006) conducted an observational in Thyroid dysfunction (n=3,610). Decreased serum TSH levels vs. Normal TSH levels was evaluated on Short QTc (below the 25th percentile of gender-specific distribution) (OR 1.53, 95% CI 1.16-2.03, p=0.008). Decreased serum TSH levels were associated with an increased risk of short QTc compared to normal TSH levels (OR 1.53; 95% CI 1.16-2.03).
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