Every week I meet patients who are somewhere on a conveyor belt they never chose to board. It started with a coronary calcium scan — often ordered “just to be thorough.” The score came back high, a stress test followed, the stress test was read as abnormal, and now there is a catheterization on the calendar and talk of a stent. No heart attack. No emergency. Just momentum.
As a cardiologist and board-certified cardiac electrophysiologist, I want to explain why that momentum deserves a pause.
What a calcium score actually measures
A calcium scan counts calcified plaque — the hardened, scarred-over deposits that represent old, stable disease. Heart attacks, however, are mostly caused by soft, inflamed, non-calcified plaque that ruptures suddenly — and that kind is essentially invisible to a calcium scan. Decades of autopsy research show that coronary plaque begins in young adulthood and is nearly universal by middle age. A high score confirms you are human. It does not locate the lesion that might hurt you.
What happens at the end of the conveyor belt
The stent placed at the end of this pathway has been tested rigorously in stable patients, and the results are remarkably consistent. In the ISCHEMIA trial, published in the New England Journal of Medicine in 2020, researchers randomized 5,179 stable patients with moderate-to-severe abnormal stress tests — the very patients this pathway sends to the cath lab — to an invasive strategy or to medical therapy alone. Over a median of 3.2 years, mortality was 5.6 percent in both groups. Not similar. The same. The COURAGE trial reached the same conclusion in 2007, and the placebo-controlled ORBITA trial showed that even the symptom relief attributed to stents is smaller than we believed.
The essential exception: when someone is actually having a heart attack, an emergency stent restores blood flow and saves lives. Nothing here applies to that situation.
The belief that outlives the procedure
Research in the Annals of Internal Medicine found that more than 80 percent of patients receiving an elective stent believed it would prevent a heart attack or extend their life — while only about one in five of their own cardiologists thought so. That misplaced confidence has a price: patients who feel “fixed” often stop working on the things that actually drive coronary disease — insulin resistance, inflammation, blood pressure, sleep, stress, and diet.
A better response to a high calcium score
Treat the score as a wake-up call, not a work order. Measure what matters — ApoB, fasting insulin, blood pressure, inflammatory markers — and attack the root causes aggressively. These are the interventions with a genuine mortality benefit, and they carry no procedural risk. And if a catheterization or elective stent is already scheduled and there is no emergency, getting a second opinion first is always reasonable. I offer telehealth consultations for exactly these decisions through Natural Heart Doctor, and I write regularly about the evidence at BestHeartBeat.com and AndrewRudinMD.com.
This article is educational and is not medical advice. Never stop or change treatment without your own physician. If you have chest pain or symptoms of a heart attack, call 911.