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ForumsCardiovascular OutcomesEchocardiographic changes on GLP-1 — LV mass and diastolic function

Echocardiographic changes on GLP-1 — LV mass and diastolic function

Dr.CardioMD Sat, May 30, 2026 at 6:58 AM 20 replies 460 viewsPage 1 of 4
Dr.CardioMD
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May 30, 2026 at 6:58 AM#1

Read the primary source rather than the write-up and the two do not agree, so here is what is actually in it.

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 follow-up is short relative to how long people actually take these drugs, so durability is an assumption here rather than a finding.

What would genuinely help is knowing how much of the SELECT benefit is plausibly independent of the weight loss, and whether that distinction changes anything practical. Numbers rather than impressions, if you have them.

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.
42 12kim_atl_prep, sarah_TO, wendy_avl and 39 others
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mike.trainer_LA
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May 30, 2026 at 8:02 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…
Dr.CardioMD said:
...we're creating a generation dependent on cardiovascular risk...

I understand the concern, but consider this analogy: are we "creating a generation dependent on" blood pressure medication? Cholesterol medication? Thyroid medication?

Obesity is a chronic disease with biological drivers. Treating it with medication is no different from treating any other chronic condition. The "dependency" framing implies weakness or moral failure — neither of which is accurate.

If ongoing medication is what keeps someone healthy, that's successful treatment, not dependency.

41 11newstart_MO, mia_MS2, LeilaHI and 38 others
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amsterdam_pete
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May 30, 2026 at 9:06 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…

This is where I part company with the consensus forming above. 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.

40 10CanadaChris, ZaraB_AL, JakeSmashed95 and 37 others
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PeptideChemSF
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May 30, 2026 at 10:10 AM#4
amsterdam_pete said:
The "earlier than weight loss explains" argument is weaker than this thread makes it sound.

NNT calculation for cardiovascular risk clinical endpoints: NNT = 1/ARR (absolute risk reduction).

From SELECT trial: MACE at 39 months — 6.5% semaglutide vs 8.0% placebo. ARR = 1.5%. NNT = 67 over 3.3 years.

Compare to established therapies:

InterventionNNTTimeframe
Semaglutide (MACE)673.3 years
Statins primary prevention (MI)~1005 years
Aspirin secondary prevention~772 years

These NNTs are clinically meaningful and comparable to accepted cardiovascular interventions.

Last edited: May 30, 2026 at 2:10 PM
39 9ricardo_MIA, BrianDallas92, labquiet_amy and 36 others
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KristenIndy
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May 30, 2026 at 4:19 PM#5
mike.trainer_LA said:
Dr.CardioMD said: ...we're creating a generation dependent on cardiovascular risk...

Can confirm. Same sequence, different timescale. I had assumed I was the exception until I read this.

38 8kate.chem, DataDave, Dr.GutHealth and 35 others
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