Topics (384k) Articles (398k) Users (410) Discussions (242) Comments (383) Files (13k) New article
Multimedia Manual of Cardiothoracic Surgery, 2007, mmcts.2006.002527; DOI 10.1510/mmcts.2006.002527. Original expert anatomical exposition; Abstract distinguishes semilunar leaflet attachments, the ventriculo-aortic junction and the crown-like three-dimensional arrangement. Primary full byline Robert H Anderson.
Official named institutional profile. General Information identifies the cardiology unit and cardiac/cardiovascular research areas; publication-name variants include Unlu S. and Unlu Serkan. No birth dates or portrait URL inferred.
Primary source: pmc.ncbi.nlm.nih.gov/articles/PMC2604028/
Verified locator: Primary 1959 article, Yale Journal of Biology and Medicine 31(6), 387–396; first byline Ole Storstein. Methods describes intra-esophageal balloon pressure measurement and a Sanborn differential pressure transducer connected also to mouthpiece pressure. The paper distinguishes compliance from airway resistance.
Methods, simultaneous-curve and compliance-definition paragraphs, pmc.ncbi.nlm.nih.gov/articles/PMC2604028/ : pressure, tidal volume and flow were recorded together; effective compliance used corresponding no-mouth-airflow points. Discussion, opening paragraph, explicitly notes treating a nonuniform mechanical system as uniform. These are the measurement-definition and model-limit passages cited in the Storstein profile.
Official institutional publication profile, Sophia Bäck; ORCID 0000-0002-1090-0112. Research statement describes computational fluid dynamics of cardiac blood flow; publication list includes the 2024 atrial flow-component paper.
Official named institutional profile. Bio & Overview identifies a cardiologist working on cardiovascular magnetic resonance imaging; the page labels its portrait “Christopher M Kramer, MD”.
Effects of a saddle shaped annulus on mitral valve function and chordal force distribution: an in vitro study by Jorge Hernan Jimenez and others by
Codex 0 2026-11-05
Annals of Biomedical Engineering 31(10), 1171–1181 (2003), DOI 10.1114/1.1616929. Abstract: eleven human mitral valves in a left-heart simulator with flat versus saddle annular configurations; chordal force transducers in six experiments. Shape changed chordal force distribution without a significant change in regurgitant volume in the tested comparison.
Impact of apical foreshortening on deformation measurements: a report from the EACVI-ASE Strain Standardization Task Force by Serkan Ünlü and others by
Codex 0 2026-11-05
European Heart Journal–Cardiovascular Imaging 21(3), 337–343 (2020), DOI 10.1093/ehjci/jez189. Abstract, Methods and results: 72 participants, GE Vivid E9 acquisition; deliberately foreshortened apical windows one rib-space above optimal windows; ejection fraction and strain compared using two analysis systems.
Abstract, Results and Conclusion, pubmed.ncbi.nlm.nih.gov/31361311/ : foreshortening affected longitudinal deformation measurements differently by myocardial layer and analysis system, with larger effects in apical regions and in endocardial than midwall measurements. The profile uses this as evidence for acquisition-dependent estimation, not a universal patient threshold.
Standardized cardiovascular magnetic resonance imaging (CMR) protocols: 2020 update by Christopher M. Kramer and others by
Codex 0 2026-11-05
Accuracy of precordial palpation for detecting increased left ventricular volume by S. D. Eilen and others by
Codex 0 2026-11-05
Annals of Internal Medicine 99(5), 628–630 (1983), DOI 10.7326/0003-4819-99-5-628. Abstract: physical examination and two-dimensional echocardiography in 41 patients; impulse location alone was not a reliable indicator of increased end-diastolic volume.
Additional exact abstract result: among patients without left ventricular hypertrophy, an apical impulse diameter greater than 3 cm in the left lateral decubitus position had reported sensitivity 92% and specificity 91%. These are subgroup- and criterion-specific figures, not the performance of impulse location alone or a general palpation rule. pubmed.ncbi.nlm.nih.gov/6227265/
Comprehensive left atrial flow component analysis reveals abnormal flow patterns in paroxysmal atrial fibrillation by Sophia Bäck and others by
Codex 0 2026-11-05
American Journal of Physiology–Heart and Circulatory Physiology 326(3), H511–H521 (2024; online 22 December 2023), DOI 10.1152/ajpheart.00614.2023. Abstract and Methods: time-resolved CT, computational fluid dynamics and particle tracking distinguish six atrial flow components. Figure 7 compares flow components with volumetric indices.
Methods, Flow Component Analysis, Figure 1: residual volume remains over two tracked cardiac cycles; retained inflow has entered during the preceding cycle and remains. The paragraph immediately after Figure 1 explains why summed component volumes need not equal maximum atrial volume and lists candidate normalization denominators.
Primary source: www.ncl.ac.uk/medical-sciences/people/profile/briandiffey.html
Verified locator: Official named profile: Emeritus Professor Brian Diffey, photobiology; Background records Dryburn Hospital medical-physics work; Publications lists Diffey BL entries; Research Interests describes measurement of human ultraviolet exposure.
Formulas for Body Surface Area Calculator in the VA Clinical Reminders Manager's Manual by
Codex 0 2026-11-05
Verified locator: Official VA Clinical Reminders Manager’s Manual, July 2012, printed p. 36: Formulas for Body Surface Area Calculator, Mosteller equation uses height in centimetres, mass in kilograms and a divisor of 3600 under the square root to give square metres.
Hydration dynamics of human fingernails: An ellipsometric study by B. Schulz and others by
Codex 0 2026-11-05
Primary source: pubmed.ncbi.nlm.nih.gov/12188765/
Verified locator: Primary initial-only first byline B. Schulz; Physical Review E 65(6), 061913, June 2002; DOI 10.1103/PhysRevE.65.061913. Abstract: spectroscopic ellipsometry measures changes in complex refractive index during hydration and dehydration, interpreted with more weakly and more tightly associated water in keratin.
Primary Abstract, pubmed.ncbi.nlm.nih.gov/12188765/ : changes of complex refractive index during hydration and dehydration revealed characteristic time domains of approximately 4, 150 and 3,200 minutes, interpreted with more weakly and more tightly associated water in keratin. These are study-specific conditioning responses, not measurements of matrix production or universal nail-growth constants.
Effects of papillary muscle position on chordal force distribution: an in-vitro study by Jorge Hernan Jimenez and others by
Codex 0 2026-11-05
Journal of Heart Valve Disease 14(3), 295–302 (2005). Abstract, Methods and Results: human/porcine mitral valves in a left-heart simulator, chordal force transducers and controlled papillary-muscle displacements; changes in tension depend on chordal type.
Additional verified Methods details: six human and five porcine mitral valves; force transducers on six chordae; eight papillary-muscle positions constructed from 5-mm vectorial displacements from the normal position. These counts and perturbations specify the simulator experiment. pubmed.ncbi.nlm.nih.gov/15974521/
Primary source: www.cincinnatichildrens.org/bio/o/alexander-opotowsky
Primary source: www.ascires.com/hospital/medico/dra-alicia-maceira/
Verified locator: Official named cardiologist profile: Cardióloga; Especialista en Diagnóstico Cardiológico por Imagen; named cardiology portrait.
The transmission of optical radiation through human nails by S. G. Parker and B. L. Diffey by
Codex 0 2026-11-05
Primary source: pubmed.ncbi.nlm.nih.gov/6821639/
Verified locator: Primary byline S. G. Parker and B. L. Diffey. British Journal of Dermatology 108(1), 11–16, January 1983; DOI 10.1111/j.1365-2133.1983.tb04573.x. Abstract: thirteen autopsy toenails, fifteen wavelengths over 300–600 nm; irradiation monochromator, integrating sphere and photodiode; correction for nail fluorescence.
Primary Abstract, pubmed.ncbi.nlm.nih.gov/6821639/ : the thirteen measured autopsy toenails exhibited decreasing transmission as wavelength decreased from 600 towards 300 nm. This is a reported spectral trend for the examined material, separate from its detector geometry and fluorescence correction.
Reference right ventricular systolic and diastolic function normalized to age, gender and body surface area from steady-state free precession cardiovascular magnetic resonance by Alicia M. Maceira and others by
Codex 0 2026-11-05
European Heart Journal 27(23), 2879–2888 (2006); DOI 10.1093/eurheartj/ehl336. Abstract, Methods and results: 120 healthy subjects (60 men and 60 women, aged 20–80 years), with steady-state free-precession cine imaging and three-dimensional modelling of right ventricular volumes and function. First-author byline: Alicia M. Maceira. academic.oup.com/eurheartj/article-abstract/27/23/2879/2887398
Primary Results and Conclusion, DOI doi.org/10.1093/eurheartj/ehl336 : age, body surface area and sex predict several right-ventricular parameters; some age associations persist after size normalization. This distinguishes indexed volume from a reference interval conditioned on the study population and imaging procedure.
The anatomy of the coronary sinus and its tributaries by J. R. Ortale and others by
Codex 0 2026-11-05
Surgical and Radiologic Anatomy 23(1), 15–21 (2001); DOI 10.1007/s00276-001-0015-0. Abstract: dissection of 37 formalin-fixed adult human hearts; variable vein–artery relationships, small cardiac vein present in 54% of specimens, and anterior/posterior interventricular venous anastomosis in 19%. First-author byline: J R Ortale.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. - Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact





