QTc vs StudyCoorCalc

QTc Calculator corrects the QT interval for heart rate, with nine published formulas at once instead of just one. Bazett is still the formula most ECG machines use, but it overestimates the QTc at higher heart rates and underestimates it at lower ones. QTc Calculator shows you right away how the result changes with other formulas, and where it sits relative to published reference limits and population data. FORMULAS Bazett, Fridericia, Framingham, Hodges, Rautaharju (two versions), Mayeda, Kawataki and Goto, side by side. Choose which formulas you want to see and in which order. Each result comes with a chart of the QTc distribution in the general population (Vandenberk et al. 2016) and a short note on the formula's strengths and weaknesses. START FROM QT OR FROM QTc Enter heart rate (or RR interval) and QT, or start from a QTc printed by the ECG machine. The app calculates the QT back from the formula the QTc came from and converts it to all other formulas. J-POINT CALCULATIONS With a QRS duration, the app adds the JT interval, the heart-rate-corrected JTrr (Rautaharju) and the JTc of each formula. For wide QRS complexes, such as in bundle branch block, it shows QTmc (Bogossian). REFERENCE LIMITS Results are color-coded against the short and long QT limits of your choice: ESC 2022, ESC 2015, AHA 2009, ESC 2005, FDA 2005, Gollob 2011, Mazzanti 2014, Goldenberg 2006 (including limits for children and adolescents) and Schwartz 1985/1993. Separate limits for women and men. SCORES • Gollob Score for Short QT Syndrome • Long QT Score (Schwartz, as in the ESC guidelines 2022) • Tisdale Score for the risk of drug-induced QT prolongation in hospitalized patients All scores open with the points for the QTc you just calculated. BASELINE COMPARISON Enter a previous ECG as a baseline. The app marks it in every chart and tells you when the QTc has increased by more than 60 msec. MADE FOR DAILY USE • Plausibility checks catch typos and unusual values right below the input field. • Notices for heart rates outside the range where QTc formulas are most reliable. • A guide to measuring the QT interval correctly (threshold and tangent method). • Share or copy a summary of all results. • Two-column layout on iPad and on iPhone Duo when unfolded. • Color-blind mode (blue instead of green). • English and German. PRIVACY No account, no ads, no tracking. The app does not connect to the internet. Your inputs stay on your device. ALL SOURCES INCLUDED Every formula, limit and score names its literature source. All references are listed in the app. IMPORTANT QTc Calculator is a calculation and reference tool for healthcare professionals. It does not provide medical advice, diagnosis or treatment recommendations and does not replace clinical judgment. Please note: This app provides only information, is not medical or treatment advice and may not be treated as such by the user. As such, this App may not be relied upon for the purposes of medical diagnosis or as a recommendation for medical care or treatment. The information on this App is not a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images and information, contained on or available through this App is for general information purposes only. Professional Medical Advice and Assistance You are strongly encouraged to confirm any information obtained from or through this App with your physician or another professional healthcare provider and to review all information regarding any medical condition or treatment with your physician or other a professional healthcare provider.

StudyCoor: Professional Pharmaceutical Study Coordination™ StudyCoor is the essential tool for clinical research coordinators, study managers, and pharmaceutical professionals who need accurate, fast medication compliance calculations on the go. CORE FEATURES Comprehensive Compliance Calculator • Support for all standard dosing frequencies: QD, BID, TID, QID, and PRN • Multi‑bottle tracking for complex dispensing scenarios • Hold days and treatment interruptions fully supported • Partial dose and PRN event integration • Real‑time compliance percentages with clear deviations Study & Subject Management • Create multiple studies and subjects • Store start & end dates, dosing instructions, bottle numbers, and consumption logs • Use defaults to speed data entry across subjects Calculation History • Save all calculations for later review • Filter and sort past calculations for quick reference Explainability & Transparency • Step‑by‑step Explainability View shows exactly how compliance is calculated • Flag descriptions for UNDERUSE, OVERUSE, and hold days • See subject compliance trends over time Privacy‑First Design • All data stored locally on your device – nothing leaves your device • No account required and no internet needed • Use de‑identified subject codes to avoid PHI Security & Compliance • Data encrypted on device StudyCoor Pro • Unlock advanced features like Explainability View, subject compliance trends, improved exports, and study & subject management • 1 month free trial available on the yearly and monthly plan • Subscription automatically renews unless cancelled in App Store settings Free Version Includes • Core compliance calculator • Basic calculation history • Basic exports • No ads, no tracking Designed for iOS • Native SwiftUI interface, works on iPhone and iPad • Supports dynamic type, dark mode, and VoiceOver for accessibility • Offline first – works wherever your study takes you Perfect For • Clinical research coordinators • Investigators, study managers, and CRO teams • Anyone needing accurate medication compliance data How It Works 1. Enter study and subject details, dosing schedule, and date range 2. Input bottle details and consumption logs (including partial doses and hold days) 3. Tap Calculate to instantly get compliance metrics and guidance 4. Review the Explainability View and history to audit calculations 5. Export CSV or PDF summaries to share with your team Support For help or feedback, contact support@studycoor.com. Subscriptions Payment will be charged to your Apple ID at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage subscriptions in App Store settings. Privacy StudyCoor collects zero personal data. All information stays on your device. Privacy Policy: https://bvquist1400.github.io/studycooriphoneapp/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Why StudyCoor? Stop the manual math. StudyCoor handles complex dosing and compliance calculations, providing transparency and peace of mind for you and your study participants.