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Johannes Enevoldsen

@johsenevoldsen.bsky.social
1.1K followers 297 following 102 posts

MD, PhD. Anaesthesiology trainee. Interested in health, statistics and scientific programming (R and Julia)

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Reposted by Johannes Enevoldsen
Carl T. Bergstrom @carlbergstrom.com · 01/05/2026
This paper was retracted from the @nejm.org because the images of bronchial branching after smoke inhalation were obviously and transparently manipulated by generative AI. Look at the ruler. I don't even know what lesson to draw from this. www.nejm.org/doi/10.1056/...
Crazy ruler above brachial branching
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Jacob S. Zelko @thecedarprince.bsky.social · 04/11/2025
I am on the job market and wanted to advertise myself here! 🤠 Looking for full-time or contracting roles! Historically, my work spans population dynamics, healthcare informatics, robust adaptive controls, software engineering, and community engagement. 🧪 #STEMjobs #academicsky #publichealth
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 30/10/2025
I don't understand the relationship between CO and ETCO2. ETCO2 increases with rising CO, if ventilation and CO2 production is constant. Is this just temporary? We can't exhale more CO2 than we produce. #anSky #medSky @doctorhelgi.bsky.social @load-dependent.bsky.social @jm-l.bsky.social
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Adam Kucharski @adamjkucharski.bsky.social · 15/10/2025
There's a puzzle I've found annoying so I thought I'd let you find it annoying too: kucharski.substack.com/p/why-the-tu...
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michielstock.bsky.social @michielstock.bsky.social · 18/06/2025
Small blog post on how to automate model building for mechanical systems using ModelingToolkit. #julialang michielstock.github.io/posts/2025/p...
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Trish Greenhalgh @trishgreenhalgh.bsky.social · 19/06/2025
Thanks for the reminder @janemunday.bsky.social. Every summer, I repost this article DROWNING DOES NOT LOOK LIKE DROWNING. To date, I know of FOUR kids who were saved after someone who'd clicked on the link learnt how to spot actual drowning. Take time to read and pass on. slate.com/technology/2...
slate.com
Drowning Doesn’t Look Like Drowning
Drowning is not the violent, splashing call for help that most people expect.
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 13/06/2025
Absolutely fascinating! We know the heart switches to lactate as energy substrate in shock, could there be a clinical benefit from lactate infusion in human cardiogenic shock? #emimcc #cccsky
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 26/05/2025
My cardiac arrhythmia simulation now also simulates how a reentrant loop can be terminated by increasing refractory time as suggested by @empoisonpharmd.bsky.social Direct link to the updated part: jenevoldsen.com/posts/excita...
jenevoldsen.com
Excitable cells – Johannes Enevoldsen
A demonstration of how reentry tachyarrhythmias can develop in a system of excitable cells.
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Sam Rose @samwho.dev · 08/05/2025
✨ It's new samwho visual essay o'clock! ✨ Reservoir sampling is one of my favourite algorithms. It allows you to sample from a set without knowing the size of that set. I try to assume no prior knowledge, and use no scary math notation. Just beautiful visuals. Let me know what you think! ❤️
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Ryan Feldman PharmD DABAT @empoisonpharmd.bsky.social · 29/04/2025
I just want to say I use this constantly at the bedside when dealing with patients who have arrythmias to explain how they propagate. would LOVE LOVE a model where increasing refractory terminates reentrant rhythm so I can show how diltiazem terminates SVT. such an amazing tool, thank you
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 08/04/2025
A 10-minute movie in a 6.3-second looping GIF. Movie: Sprite Fright (#Blender open movie): studio.blender.org/projects/spr... Code (#JuliaLang and @makie.org) gist.github.com/JohannesNE/2...
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Guillaume Dalle @gdalle.bsky.social · 11/03/2025
Fellow #JuliaLang enthusiasts in Europe, I've got 4 words for you. JuliaCon Local Paris 2025 Yes, it's happening. Like the global @juliacon.bsky.social event, but with more croissants. Stay tuned!
juliacon.org
JuliaCon Local Paris 2025
JuliaCon Local Paris 2025
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 25/02/2025
Where I could really see a place for LLMs in medicine right now, is not for decision-making, but for understanding a patient's medical records in a reasonable time. - Find plans for this admission, that were never followed up upon. - Give a short review of the pt's medical history. ...
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Razvan Azamfirei @razvan.azamfirei.com · 01/02/2025
The Hypotension-Prediction Index--a convoluted way of predicting hypotension by...checking whether the MAP is low--fails once again. Shocker. "HPI-guided hemodynamic therapy did not reduce the incidence of postoperative AKI or overall complications [vs] standard care."
journals.lww.com
Hemodynamic Management guided by the Hypotension Prediction ... : Anesthesiology
erate-to-high-risk elective abdominal surgery patients. Methods: This multicenter randomized trial was conducted from October 2022 to February 2024 across 28 hospitals evaluating HPI-guided managem...
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 20/02/2025
I wrote a short interactive article👆 It uses simulations to demonstrate how different cardiac arrhythmias can develop. Try it out! (It has defibrillators ⚡️) jenevoldsen.com/posts/excitable-cells #medsky #cardiosky #cccsky #emimcc
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 16/02/2025
I'm writing an interactive article demonstrating how certain cardiac arrhythmias can develop. Feedback is very welcome! jenevoldsen.com/posts/excita... #CardioSky #MedSky @load-dependent.bsky.social @zentensivist.bsky.social @nickmark.bsky.social @kdpsingh.bsky.social
jenevoldsen.com
Johannes Enevoldsen - Excitable cells (draft version)
A demonstration of how reentry tachyarrhythmias can develop in a system of excitable cells.
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 03/02/2025
Is it possible to have massive pulmonary emboli, get systemic thrombolysis and then have no thrombus visible on a CTA a couple of hours later? Was there ever pulmonary emboli? #emimcc #cccsky
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Swapnil Hiremath 🍁🇨🇦 @hswapnil.medsky.social · 09/01/2025
It’s mostly nonsense anyways Wait for the trials to come out www.nephjc.com/news/landmar... ajkdblog.org/2021/06/16/c...
nephjc.com
Are Calcium-based Phosphate binders bad? A Rant/Commentary — NephJC
How strong is the evidence against calcium based PO4 binders? Swap breaks it down in his usual style
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 09/01/2025
I recently had an equivalent experience with understanding calcium-phosphate disorder in CKD... 🫠
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 09/01/2025
What do we think about adjusting p-values for safety outcomes for multiple testing, and then claiming no significant harm? Is this common practice? Any papers commenting on the (in)appropriateness? #statsSky @stephensenn.bsky.social @statsepi.bsky.social @f2harrell.bsky.social
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Kasia @scullingmonkey.bsky.social · 28/11/2024
Which is why we need people who critically look at ML/chatgpt/AI I love new toys, gadgets, technology, data trends But I’m a scientist first and hope this will never change
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 07/03/2018
1w cough and increasing dyspnea. Upon pickup by paramedics sat70%, hypotensive. ⬆️CRP/WBC. Pneumonia/septic shock assumed, abx and bolus fluids initiated, intubated in the ER. Hypotensive despite high dose pressor, #Echo follows #FOAMed #FOAMcc
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 24/11/2024
What prior do you use for SEED?
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 23/11/2024
Check my starter pack and tell me who to add! Also contains the #pocus feed. go.bsky.app/EtZL9J6
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 23/11/2024
This is something I've had to rediscover every time I've made graphics for a new project. Great post.
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Swapnil Hiremath 🍁🇨🇦 @hswapnil.medsky.social · 23/11/2024
Semi related - we went big on the pivotal like protocol in Ottawa www.nephjc.com/news/pivotal Our ESA requirements plummeted. Many patients have come off ESA completely. I think that’s a good thing!
nephjc.com
The ESA Empire Explodes — NephJC
Can PIVOTAL pivot us to pump more iron? It is indeed a pivot from the lazy, halycon days of the ESA era, now to the evil ESA empire crumbling under the strong iron attack. Join us to discuss!
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 22/11/2024
#askrenal A patient on hemodialysis and EPO has a hemoglobin of 9 mmol/l (14.5 g/dl). Do you phlebotomize (e.g. dumb dialysis blood) or just reduce EPO? (Is it the Hgb itself or the overtreatment with EPO that increases mortality?)
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Zaven Sargsyan @sargsyanz.bsky.social · 21/11/2024
I like how rigors are strongly predictive of bacteremia but a "feelin' a little chilly" has a LR < 1 (though not significant). (From JAMA RCE Does This Patient Have Bacteremia). #MedSky #IDsky
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Alasdair Munro @apsmunro.bsky.social · 12/11/2024
MYCOPLASMA PNEUMONIAE This cheeky little intracellular bacteria seems to be up to mischief with kids in the USA at the moment A quick thread on this bug, what's going on, and what to do (or not do!) about it #IDSky #PedSky #PedsIDSky 🧪 1/🧵
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Nephgirlsketches @nephgirlsketch.bsky.social · 12/11/2024
Good night #medsky #nephsky
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 13/11/2024
Thanks to @nickmark.bsky.social and team for the Critical Care Time podcast! Just listened to the diuresis and fluid balance episode, which I highly recommend—also outside ICU/critical care. www.criticalcaretime.com/episodes/diu...
criticalcaretime.com
#25 Diuresis & Negative Fluid Balance — Critical Care Time
Diuretics are essential tools used by clinicians to manage volume status in ambulatory patients and in the critically ill… but are we using them correctly? Join Nick &amp; Cyrus as they explore princi...
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🇳🇴Asbjørn Støylen🇩🇰 @strain-rate.bsky.social · 12/11/2024
#Medsky #cardiosky #echosky Anyone interested in cardiac ultrasound esp deformation imaging and cardiac mechanics, please take a look at my strain rate HomePage stoylen.folk.ntnu.no/strainrate/
stoylen.folk.ntnu.no
index
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josh farkas 💊 @pulmcrit.bsky.social · 12/11/2024
point-of-care electrolyte analyzers cannot detect hemolysis! so point-of-care hyperkalemia may or may not be real. in this case, the hyperkalemia was wholly artifactual. think twice before unleashing therapy for hyperkalemia (the ECG is often the key) (more: emcrit.org/ibcc/hyperka...) #emimcc
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Karandeep(Singh) @kdpsingh.bsky.social · 12/11/2024
Is there a starter pack of bot accounts posting engagement bait spam that I should follow? Trying to make this feel like home.
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 11/11/2024
Any recommended resources for learning #POCUS ? And are there any especially high-yield examinations to start with? #nephsky #medsky
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 22/10/2023
I have made a nascent feed for echocardiography related content. Use #echofirst or #echosky tags. #cardiosky bsky.app/profile/did:...
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 04/11/2024
Any recommendations for good papers comparing SaO2 (ABG 💉) vs SpO2 (pulse oximetry ☝️)? #medsky #CriticalCare
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 21/10/2024
The central venous pressure (CVP) waveform is the interaction between a fast cyclic effect of the heart and a slower cyclic effect of ventilation. A steady CVP waveform can be visualized as a 3D plane. 🩺 (Old Twitter post)
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Andy Reisinger @andyreisinger.bsky.social · 09/10/2024
Hurricanes should from now on simply be named after fossil fuel companies. Alphabetically. British Petroleum, Chevron, ConocoPhillips, Eni, ExxonMobil, Gazprom,...
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 08/10/2024
Guess where this study was performed: "Thirty healthy subjects ingested 10 solid radiopaque markers (small pieces of nasogastric tubing) together with a standard meal (donuts and 7-Up)."
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Maarten van Smeden @maartenvsmeden.bsky.social · 08/10/2024
We are hiring a new fully funded PhD student We are searching for an enthusiastic PhD student to work on cutting edge methods research, working on methods to combine knowledge from cardioelectrophysiology, 'conventional’ ECG analysis and machine learning. www.werkenbijumcutrecht.nl/vacatures/we...
werkenbijumcutrecht.nl
Vacature — PhD student SciML4Medicine
PhD student SciML4Medicine: electrocardiography analysis with mathematical modeling and deep learning.
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 07/10/2024
Had a patient who, when I entered the room, paused the music playing on his bluetooth hearing aid. He then asked me to excuse him until an ad had finished, before he could hear anything. Probably a user error, but felt quite dystopian 😨
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 28/09/2024
The joint orientation on this swing...
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Lars Mølgaard Saxhaug @load-dependent.eurosky.social · 25/09/2024
The following question was posted on a different platform: Can you comment on diastolic function in a patient who is not at steady state (eg anaesthetised, critically unwell on inotropes)? Here are my thoughts (and my strongest pet peeves- leading to my handle) #echosky 📟 #cardiosky
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Alasdair Munro @apsmunro.bsky.social · 20/08/2024
I would like to report a near miss event please
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Heiner Salomon @heinersalomon.bsky.social · 19/08/2024
I am currently planning on writing a whole research paper in #quarto/ #r-#markdown. How do other fellow #academic researchers enable others (possibly without #git/ markdown) to provide comments that are easily integrated in a markdown flow? #AcademicSky #StatsSky #EconSky
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Johannes Enevoldsen @johsenevoldsen.bsky.social · 09/08/2024
Are trends really that useful? 📉 I see a lot of doctors emphasize the importance of looking at trends (changes) in measurement, e.g. lab values or vitals. Can anyone give examples where trends give important info over simply looking at the most recent value?
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Darren Dahly @statsepi.bsky.social · 09/08/2024
Put another way, I've come across very very few applications of AI in medicine and health that might actually be worth "explaining"! 😜
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Thomas Lin Pedersen @thomasp85.com · 29/05/2024
I am super excited to announce the first release of marquee - supercharged markdown support for #ggplot2 (and #rstats graphics in general) Read all about it here: tidyverse.org/blog/2024/05... and browse the package site at: marquee.r-lib.org
tidyverse.org
marquee 0.1.0 - Tidyverse
The initial release brings markdown awareness to grid and ggplot2 to allow for rich text formatting in R graphics.
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