EchoRef vs EEG Mapper

Echocardiography and point-of-care ultrasound organized for the bedside. EchoRef is a comprehensive echocardiography and ultrasound reference for physicians, nurses, advanced practice clinicians, sonographers, medical students, and other healthcare learners. Review TEE, TTE, and POCUS videos, check cardiac measurements and diagnostic criteria, evaluate native and prosthetic valves, and perform commonly used ultrasound and hemodynamic calculations, all in one focused reference. FEATURES • Educational video library covering 2D and 3D TEE, interventional echocardiography, mechanical circulatory support, and clinical cases • POCUS instruction for cardiac, lung, abdominal, vascular, and peripheral nerve block examinations • Cardiac anatomy measurements and reference values for chamber size, ventricular function, diastology, and vascular structures • Native valve assessment for aortic, mitral, tricuspid, and pulmonic stenosis and regurgitation • Prosthetic valve reference for surgical valves, TAVR, and prosthesis evaluation • Ultrasound and hemodynamic calculators for valve area, cardiac output, ventricular function, filling pressures, vascular resistance, shunts, fluid responsiveness, and more • Cardiac equations, hemodynamic reference values, and ultrasound physics • Clinical protocols, focused examination guidance, findings atlas, and reporting documentation • Acquisition guidance, measurement tips, common pitfalls, and related clinical content • Global search, favorites, related links, and personal notes EchoRef connects ultrasound physics, image acquisition, echocardiographic interpretation, and bedside decision-making. Whether you are learning standard views, reviewing an unfamiliar finding, evaluating valve disease, or checking a calculation, the app makes relevant information easy to find. Created by Rishi Kumar, MD, FACC (“RK.MD”), an academic adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist committed to free, open-access medical education. Learn more at https://rk.md EchoRef is intended for educational and informational purposes only. It does not provide medical advice and is not a substitute for professional judgment, diagnosis, or treatment. Clinical findings and calculations must be independently verified and interpreted in the context of the individual patient. Seek guidance from a qualified healthcare professional regarding any medical condition. Do not disregard or delay professional medical advice because of information provided by this app.

Learn the International 10/20 EEG electrode placement system with this comprehensive learning companion. The 10/20 system is the global standard for scalp electrode positioning during electroencephalography. This app guides you through every step: learning why 10% and 20% intervals work, finding anatomical landmarks on the human head, converting three simple tape measurements into exact electrode coordinates, and testing your knowledge. Key Features: 10/20 Learning Guide – A structured 4-step course teaching the system from principles to practice, with landmark detection, measurement technique, and final verification checklist. Interactive Head Map – Visualize all 21 electrode sites with superior view layout. Sites are color-coded by brain lobe (prefrontal, frontal, temporal, central, parietal, occipital, midline) with region-specific descriptions of typical EEG activity. 10/20 Calculator – Enter three tape measurements (nasion to inion, ear to ear, head circumference) and get precise centimeter positions for every electrode using the standard 10-20-20-20-20-10 cumulative percentage pattern. Electrode Index – Searchable reference with all 21 sites, legacy nomenclature mappings, and functional notes for each brain region. Quiz & Self-Test – Practice identifying electrodes on an unlabeled head map. Questions adapt to focus on areas you haven't fully mastered yet. Progress Tracking – Save your learning progress and pick up where you left off. Perfect for EEG technicians, Sleep students, and clinical professionals preparing for placement procedures. Whether you're new to the 10/20 system or refining your technique, this app provides fast, practical reference and interactive learning in one place.