Key result
The linear regression formula QTcV = QT + 0.087(1- RR) was the most consistent method for QT correction in dogs, strongly correlating with the QT interval (r=0.83).
Why the study?
Which method of correcting the QT interval is the most appropriate for dogs regarding different ranges of normal heart rate?
Population
Healthy adult dogs (n=130; German Shepherd, Boxer, Pit Bull Terrier, and Poodle)
Design
Preclinical
Authors
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Supports QTcV as preferred QT correction across HR ranges in healthy dogs; leaves open validation in clinical or arrhythmic populations.
Cross-Sectional (n=130)
Which method of correcting the QT interval is the most appropriate for dogs regarding different ranges of normal heart rate?
Effect estimate: r=0.83 (95% CI 0.22-0.23)
p-value: p=<0.05
The linear regression formula QTcV = QT + 0.087(1- RR) is a simple and reliable method for correcting the QT interval in dogs in clinical practice.
Barreto et al. (2014) conducted a cross-sectional in Healthy dogs (n=130). Linear regression formula (QTcV = QT + 0.087(1- RR)) vs. Quadratic and cubic regression formulae was evaluated on Consistency and correlation of corrected QT values (QTc) with the QT interval (r=0.83, 95% CI 0.22-0.23, p=<0.05). The linear regression formula QTcV = QT + 0.087(1- RR) was the most consistent method for QT correction in dogs, strongly correlating with the QT interval (r=0.83).
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