
Dad to Leah and Cora. Cardiologist and Internal Medicine Residency APD @nyugrossman Opinions my own.
New York, NY
Joined July 2009
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Number 2 here is such a powerful insight that applies to domains beyond money
"An external locus of control" is a profound observation about health literacy/insight that is relevant for almost every single patient I see
How can "spend less than you earn" be jargon that people don't understand?
1. 50% of people don't know their own household income
2. A lot of people do not understand that they can control what they spend. Yes, really. In fact, they have an "external locus of control" and genuinely believe that life happens to them, so when you tell them to "spend less than they earn," it's a nice intellectual idea that they do not connect to their own reality. They see themselves as having no control over their job, relationship, and money. (This is almost always passed down from parents, who quite rationally believed they had little control over their lives because it was often true!)
These are descriptions to help you understand why people behave the way they do, not to excuse it
If you get truly curious about human nature, you can start to see these patterns everywhere
This whole ecosystem couldn't exist without regular medicine available to handle when there are actual problems
This gatekeeper argument is so silly. Just because we advise caution doesn’t mean we can actually stop anyone from getting these scans.
Plus we have AI now, you don’t actually really need a doctor. Until you do.
It’s a free country baby. Capitalism. I honestly think we should actually let the med spas run wild. Can’t wait for the $$$ from all the follow up testing I’m going to interpret.
Greg Katz, MD retweeted
Greg Katz (@gregorykatz) wrote something worth your time on how we read LDL and cardiac risk. I'm the cautionary tale.
Metabolically healthy. Low-carb. Former athlete. Sure my creeping LDL just needed a "more sophisticated" interpretation. Flat CGM, felt invincible.
Stent at 44. 80% RCA lesion. A scan 8 years earlier: 100% clean, zero plaque.
A clean scan in a young artery is not a lifetime warranty. Youth runs out.
gregorykatz.substack.com/p/t…
My latest substack article on the cholesterol influencer space
gregorykatz.substack.com/p/t…
Greg Katz, MD retweeted
The idea that New York has a dog shit problem becuase of a lack of resources is laughable, offending dogowners just don’t care because they’re sociopaths
New Yorkers shouldn’t have to dodge 🐶 💩 on their own block.
The Council has introduced the SCOOP Act to expand resources to keep our neighborhoods 🐶 💩 free.
But we can’t do this alone. Join the new NYC Scoop Patrol, where you can post yourself helping clean your community and tag @nycscooppatrol.
Farxiga is now $8/month on @costplusdrugs (or under $5 monthly if you get a 90 day supply)
The same medication on GoodRx? More than 10-20x that.
I'm a cardiologist. SGLT2 inhibitors keep my heart failure and kidney disease patients alive. Too many of them couldn't afford it before. Now they can.
Thank you @mcuban ! This changes things in a big way for my patients
gregorykatz.substack.com/p/i…
The only "arena" that matters when it comes to trial appraisal is actually taking care of patients
All we should care about it how the trial applies to patients that we are supposed to take care of
Again. I repeat: The Roosevelt’s “man in the ring” criticism of trial appraisal is to be noted and ignored
Trial appraisal is not personal; it’s LITERALLY our job as evidence-based clinicians
#acc26
Would take your line of reasoning even farther - in the real world most patients care about 100x more about how you treat them and whether you listen than about your medical decisions
off topic from current discussion but relevant still. this is why i'm not truly worried about "AI will replace doctors"
cuz in the real world where I live and practice medicine, most patients in my experience want a doctor who can not only do math but also has these silly useless "skills" we call social skills, empathy, emotional intelligence etc etc
yes, there are doctors who sorely lack in people skills but it doesn't mean we should push for a future where our "doctors" don't have them at all
Also worth considering the source here. Malhotra built his career claiming statins kill us.
So it's almost progress that he's now conceding they merely save 'only a few days of life on average.'
But just as we apply pre-test probability to whether a study's results are likely to be valid, we should apply it to whether Malhotra's statements on statins reflect genuine interpretation of the evidence or a cynical pattern of misrepresentation.
A greatly under-appreciated side effect of niche academic debate on twitter is that everyone else (aka gen public) can see it too.
While other docs rightly call out obvious misinformation, John comes out and says well actuallyyyyyy, if you look at the data, he’s not *actually* wrong! See?!
What others see: hmm Aseem Malhotra is making sense… hey look an esteemed cardiologist using papers to support Aseem Malhotra’s claim, looks legit! 🤔
Do you think people realize the nuance that the actual problem (the “fuss”) is not that data itself but the fact that it is being intentionally misused to push a dangerous and misleading narrative that might influence people who actually need their statin the most, to stop taking them? No. Why should they either?
John could have used this opportunity to really highlight that, but he didn’t. Interesting.
The problem is not the data, it is the messaging and narrative.
I often tell my residents to be selective about what you decide to read
Just like you are what you eat, your information diet becomes what you think
When you read useless studies that just describe correlations, you poison your brain into thinking that we know things that we don't
You're almost always better off re-reading a landmark RCT than reading something new
If my left hand is on fire and my right hand is frozen, on average I have two hands at the perfect temperature
Dr. Aseem Malhotra: "If you take a statin for 5 years after a heart attack... in that 5 year period, how much would you think or hope it would add to your life expectancy?"
Joe Rogan: "25%? 30%?"
Malhotra: "Just over 4 days."
Readers added context they thought people might want to know
More than 90 percent of people who have a heart attack don't die of a heart attack within the next 5 years. So if you ask "how much extra life will a statin give you in those 5 years?" the answer will be small.
Published work shows overall benefit of multiple months to a year: doi.org/10.1371/journa…
Greg Katz, MD retweeted
Replying to @drjohnm
John- longtime listener, first time commenting. If one’s BP is 160/90, you don’t treat it if no other comorbidities? Just wait and treat after the stroke?
Lipid lowering should be individualized.
Risk calculators often underestimate risk for young people with elevated risk
Just like they overestimate risk for healthy older people
Across a population it’s great, but for an individual, not so much
A lot of the discussion about ChatGPT health is missing the most important point
Health data is a cesspool - and maybe that’s too generous a description
Do you know how difficult it is to connect and visualize data across healthcare systems?
Do you recognize how awful epic is for trending your info in a single healthcare system let alone multiple systems?
The current healthcare system is totally incapable of integrating important data points like home blood pressure numbers, wearable data, and DTC lab tests.
If ChatGPT health promises anything transformational, it’s the possibility of actually using all of this important data and visualizing it in a useful way
Health data is absolutely abysmal, and I could not be more excited about disruption in this space
A nice summary of the implications of ChatGPT Health @TIME – with a focus on whether you should trust @OpenAI with your health data.
Quotes by me, @AdamRodmanMD, @dbittermanmd, others.
time.com/7344997/chatgpt-hea…
Greg Katz, MD retweeted
If you've read any healthcare prediction post, one of the more obvious call outs will be the rise of longevity + consumerization this year.
As a PCP with a deep interest in the space, my thoughts below
harrysaag.substack.com/p/202…
#Longevity
Paying for quality in medicine
What could possibly go wrong?
Surely useless new metrics to game here
Greg Katz, MD retweeted
Replying to @NateSilver538 @HistoryBoomer
When I first moved to nyc I went to Gristedes and was like “am I in Chechnya”
US @MedicareGov will pay for AI heart scans that haven't proven they work
open.substack.com/pub/gregor… via @gregorykatz














