Dimitri's Letters · Issue 18

Interview Season, AI Reviewers, and a 19 Million Dollar Question

Training, research, and the specialty itself. Three things worth knowing this week.

  1. Residency and Fellowship · What happens after September 23
  2. Research · The reviewer reading your paper may not be human
  3. Cardiothoracic Surgery News · Lifetime earnings, and a new POAF guideline

Part One · Residency and Fellowship

The Eleven Days Before Your Inbox Changes

Last week I wrote about why September 23 is the date that actually matters in this application cycle. It is now eleven days away. This week, what happens immediately after it.

Programs begin file review on September 23 at 9 a.m. ET. The first interview invitations follow within days, not weeks, and they do not arrive in a single organized batch. They arrive in waves. Some specialties coordinate a shared release date. Most do not.

Here is the part that catches people off guard.

At many programs, interview slots are allocated first come, first served after the invitation goes out. Desirable dates can fill within hours. The applicant who sees the email at 4:15 p.m. and responds at 4:20 has a meaningfully different set of options than the one who sees it at 9 p.m. This is not a measure of how much a program wants you. It is a queue.

The invitation tells you a program is interested. The speed of your response determines what that interest is actually worth to your calendar.

A second structural feature worth understanding: most programs run hold lists and trickle invites. A first round goes out, then additional invitations follow as applicants decline or new dates open. Silence in early October is not a rejection. It frequently means a program has not finished releasing its slots. Applicants who treat the first wave as final data make ranking and outreach decisions on incomplete information.

Practically, the season runs October through January, with December and January the busiest. Match Day is March 19, 2027.

What to do with this

Build the capture system before September 23, not after the first invitation arrives. Set email filters for terms like interview, invite, and the name of your scheduling platform. Turn on push notifications on your phone. Decide now which dates are genuinely locked, and ask one trusted person to watch your inbox during any window you cannot. The goal is that no invitation sits unopened for six hours, because in this specific season that gap is expensive.

Part Two · Research

The Reviewer Reading Your Paper May Not Be Human

Last month I wrote about watermarking and what it means for disclosing your own AI use. This is the same question from the other direction, and it is considerably less discussed.

21%

Share of the roughly 70,000 peer reviews for ICLR 2026, a major machine learning conference, that were assessed as fully AI generated. Not polished with AI. Classified by the detector as written start to finish by a language model.

That figure comes from an analysis by Pangram Labs, a firm specializing in AI content detection, covering the complete review set for ICLR 2026, released in November 2025. It is the most concrete public estimate available. Medicine has no audit of this scale, which is itself worth noting.

What medicine does have is guidance. In March 2026, members at the Committee on Publication Ethics Forum advised on a case about precisely this problem, in which a journal described a rise in review comments that appear detailed and specific but raise issues unrelated to the actual content of the paper. Detection tools have returned rates above 80 percent on some of these reviews. When editors ask, many reviewers deny the use or simply do not respond, which extends review times and adds work for editorial teams.

A review that looks thorough and says nothing about your paper is a different failure mode than a review that is short or harsh. It is harder to appeal, because on the surface it reads as diligence.

There is a confidentiality dimension that authors rarely consider. Elsevier's generative AI policy, updated in June 2026, states plainly that reviewers should not upload a submitted manuscript or any part of it into an AI tool, because doing so may violate author confidentiality and proprietary rights, and where the manuscript contains identifiable information, may breach data privacy rights. Your unpublished manuscript, in other words, is only as confidential as the habits of the reviewer holding it.

It is worth keeping the scale honest. A large international survey of 1,260 medical journal peer reviewers, posted as a preprint this year, found that while 86.2 percent were familiar with AI chatbots and 87.7 percent had used tools like ChatGPT generally, 70.3 percent had not used them for peer review at all. Nearly 70 percent said their institutions offer no training on the question, and 60.7 percent said they would want it. Most reviewers are not doing this. Enough are that it changes what you can assume.

What to do with this

Stop treating peer review as your safety net. The practical shift is to assume the reviewer will not catch the structural weakness you already suspect is there. Pressure test your own methods, your own outcome reporting, and your own limitations section before submission, rather than submitting to find out. If a returned review raises points that do not correspond to your manuscript, say so specifically and politely in your response to the editor. Editors are actively tracking this pattern right now.

Part Three · Cardiothoracic Surgery News

What Published This Season

The Annals of Thoracic Surgery · August 2026, 122(2):484-492

Lifetime earnings in cardiothoracic surgery, compared across subspecialties and pathways

Using salary data from the 2024 STS Compensation Report, a net present value model estimated career long discounted earnings at 19.3 million dollars for adult cardiac surgeons, 19.1 million for congenital heart surgeons, and 14.1 million for thoracic surgeons at the 50th income percentile. Congenital heart surgery showed the widest variability, reflecting later workforce entry alongside substantial later career upside, exceeding 40 million dollars at the 90th percentile with a long career and leadership roles. The analysis modeled integrated and traditional pathways separately and used Monte Carlo simulation for uncertainty. For anyone weighing a subspecialty decision, this analysis puts numbers on the tradeoff across subspecialties and pathways using STS compensation data.

The Annals of Thoracic Surgery · August 2026, 122(2):255-277

New STS guidelines on postoperative atrial fibrillation, and what they declined to endorse

The most common complication after cardiac surgery now has its first STS guideline focused specifically on POAF after cardiac surgery. The STS Workforce on Evidence-Based Surgery, co-led by Subhasis Chatterjee and Stefano Schena, produced 15 recommendations spanning 8 preventive, 3 intraoperative, and 4 postoperative strategies. Two Class I recommendations cover perioperative oral amiodarone and cardioversion for hemodynamically unstable POAF. Two Class IIa recommendations support posterior pericardiotomy and perioperative beta blockers. The more revealing number is what follows: 8 Class IIb recommendations reflecting genuine uncertainty, and 3 Class III recommendations for therapies without demonstrated benefit. An accompanying invited commentary argues the guideline is as informative for what it declined to endorse as for what it recommended.

The Annals of Thoracic Surgery · April 2026, 121(4):774-789

Joint SCA and STS consensus on direct oral anticoagulants in cardiac surgery

The Society of Cardiovascular Anesthesiologists and STS have issued a joint consensus statement on managing direct oral anticoagulants in adult patients undergoing cardiac surgery, an area where practice has varied widely and formal guidance has been thin. Worth reading in full if you are making perioperative anticoagulation decisions regularly.

Whether you are building a capture system for interview season, stress testing a manuscript before it reaches a reviewer, or working through what a new guideline changes in your own practice, that is the kind of thinking AskDimitri is built for.

Work through it with AskDimitri →

Editor's note: in October 2026 the figures in this letter were checked against the sources listed below, and the text was corrected where the letter as sent differed from them.

Until next week,

Dimitri

Dr. Dimitrios Magouliotis · Research Associate Professor, cardiac surgery research · About the author

Sources

  1. AAMC. 2027 ERAS residency timeline. Accessed 18 October 2026. https://students-residents.aamc.org/eras-tools-and-worksheets-residency-applicants/eras-2023-residency-timeline
  2. AAMC. The interview timeline. Accessed 18 October 2026. https://students-residents.aamc.org/applying-residencies-eras/publication-chapters/interview-timeline
  3. NRMP. 2027 Main Residency Match calendar. https://www.nrmp.org/wp-content/uploads/2026/03/2027-Main-Residency-Match-Calendar-FINAL.pdf
  4. Emi B. Pangram predicts 21% of ICLR reviews are AI-generated. Pangram Labs. 18 November 2025. https://www.pangram.com/blog/pangram-predicts-21-of-iclr-reviews-are-ai-generated
  5. Naddaf M. Major AI conference flooded with peer reviews written fully by AI. Nature. 2025;648:256-257. doi:10.1038/d41586-025-03506-6.
  6. Committee on Publication Ethics. Case 26-02: Editors suspect that reviewers are using artificial intelligence. 2026. https://publicationethics.org/guidance/case/editors-suspect-reviewers-are-using-artificial-intelligence
  7. Elsevier. Generative AI policies for journals. Policy updated June 2026. https://www.elsevier.com/about/policies-and-standards/generative-ai-policies-for-journals
  8. Ng JY, Bhavsar D, Dhanvanthry N, et al. Attitudes and perceptions toward the use of artificial intelligence chatbots for peer review in medical journals: a large-scale, international cross-sectional survey. medRxiv [Preprint]. 7 April 2026. doi:10.64898/2026.04.07.26350263.
  9. Greiten LE, Rajab TK, Mokashi S, Gillaspie E, Jacobs JP, Daily JA. Career-long earnings in cardiothoracic surgery: a comparative net present value analysis. Ann Thorac Surg. 2026;122(2):484-492. doi:10.1016/j.athoracsur.2026.03.019. PMID: 41865956.
  10. Chatterjee S, Grant MC, Hui DS, et al. The Society of Thoracic Surgeons 2026 clinical practice guidelines for the prevention and treatment of new-onset postoperative atrial fibrillation after cardiac surgery. Ann Thorac Surg. 2026;122(2):255-277. doi:10.1016/j.athoracsur.2026.04.002. PMID: 42009116.
  11. Engelman DT. The dog that did not bark: what the 2026 STS postoperative atrial fibrillation guidelines tell us by what they declined to say. Ann Thorac Surg. 2026;122(2):277-278. doi:10.1016/j.athoracsur.2026.04.040. PMID: 42103050.
  12. Budd AN, Kertai MD, Wyler von Ballmoos MC, et al. Management of direct oral anticoagulants in adult patients undergoing cardiac surgery: a joint consensus statement by the Society of Cardiovascular Anesthesiologists and The Society of Thoracic Surgeons. Ann Thorac Surg. 2026;121(4):774-789. doi:10.1016/j.athoracsur.2026.01.005. PMID: 41609547.

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