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ForumsClinical Trials & ResearchSTEP-HFpEF: semaglutide in heart failure with preserved EF

STEP-HFpEF: semaglutide in heart failure with preserved EF

Dr.CardioMD Fri, Jun 5, 2026 at 8:24 AM 15 replies 386 viewsPage 1 of 3
Dr.CardioMD
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Jun 5, 2026 at 8:24 AM#1

Putting this up for argument rather than for agreement. I have read it twice and I am still not certain what it supports.

SELECT is the trial that changed the framing of this class, because it was an outcome trial rather than a weight trial: about a 20% relative reduction in major adverse cardiovascular events in people with established cardiovascular disease and overweight or obesity, without diabetes. The effect appeared earlier than the weight-loss curve can comfortably explain, which is the basis for arguing that some of the benefit is direct — anti-inflammatory and vascular — rather than purely a consequence of weight.

Where I think it is weakest: the completion rate deserves as much attention as the headline, because a large effect among those who finished is a different claim from a large effect among those enrolled.

So the question, as narrowly as I can put it: how much of the SELECT benefit is plausibly independent of the weight loss, and whether that distinction changes anything practical. Tell me what I have not thought of.

Note on sourcing:
Figures above are from the primary publication rather than the press summary. If a number here disagrees with one you have, post yours and we will work out which of us is reading a secondary source.
6 9kim_atl_prep, sarah_TO, wendy_avl and 3 others
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mike_nyc
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Jun 5, 2026 at 8:50 AM#2
Dr.CardioMD said:
SELECT is the trial that changed the framing of this class, because it was an outcome trial rather than a weight trial: about a 20% relative reduction…

All true, with one condition: that curve is for people who reached the dose on schedule. Anyone who slowed the ladder for tolerability is on a different, flatter curve, and comparing yourself with the published mean will make you feel like a non-responder when you are not.

7 10stefan_berlin, Dr.EM_Chicago, pete_RVA and 4 others
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Dr.GastroMayo
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Jun 5, 2026 at 9:17 AM#3
Dr.CardioMD said:
SELECT is the trial that changed the framing of this class, because it was an outcome trial rather than a weight trial: about a 20% relative reduction…

I read this differently from Dr.CardioMD, on substance rather than tone. The "earlier than weight loss explains" argument is weaker than this thread makes it sound. Blood pressure and inflammatory markers move fast and are downstream of early weight loss, so the mechanism is not as cleanly separable as the summaries imply.

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rachel_ABQ
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Jun 5, 2026 at 9:43 AM#4

Answering the narrow version, because the broad one does not have a single answer. Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak. People who dose late are not losing a peak, they are letting the trough fall, and the appetite effect tracks the trough.

9 12SkepticalSean, Dr.CardioMD, EndoResFellow and 6 others
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mel_PDX
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Jun 5, 2026 at 12:17 PM#5
mike_nyc said:
All true, with one condition: that curve is for people who reached the dose on schedule.

That holds for the injectable. The oral formulation has different absorption behaviour and the dose numbers are not interchangeable, which is worth saying out loud because people quote them as if they were.

10 13RegAffairsDC, BiostatsBrad, PeptideSynthNJ and 7 others
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