QTc Reference Calculator is a fast, streamlined reference tool for licensed healthcare professionals and medical students to compute corrected QT intervals at the bedside using four established, peer-reviewed formulas.
FORMULAS INCLUDED:
• Bazett (1920) • Fridericia (1920) • Framingham/Sagie (1992) • Hodges (1983)
KEY FEATURES:
• Instant QTc Calculation — Enter QT interval and heart rate to get immediate results using the widely referenced Bazett formula
• Formula Comparison View — One tap displays three alternative correction formulas (Framingham, Fridericia, and Hodges) with published evidence of better rate-correction accuracy at elevated heart rates
• Published Reference Ranges — Results displayed alongside commonly cited thresholds from peer-reviewed literature, with color coding to indicate position relative to these ranges
• Apple Watch Support — Full-featured calculator right on your wrist for quick bedside reference
• Full Methodology Disclosure — In-app access to every formula, equation, and published citation used in calculations
• Clean, Focused Design — No clutter, no ads, no unnecessary features — just the calculation you need
WHY MULTIPLE FORMULAS MATTER:
Published studies indicate Bazett's formula overcorrects at elevated heart rates. For patients with atrial fibrillation or tachycardia, the Framingham, Fridericia, and Hodges formulas show better rate-correction accuracy. This app makes it easy to compare all four formulas side by side when clinical context calls for it.
All formulas are sourced from published, peer-reviewed medical literature. No proprietary algorithms or novel methodologies are used.
IMPORTANT: This app is a reference calculator for licensed healthcare professionals only. It does not diagnose, treat, or recommend therapy for any medical condition. All clinical decisions must be made by qualified clinicians exercising independent professional judgment. Consult with a physician before making medical decisions.
