What does this research mean for the field?

Asymptomatic individuals with very high coronary artery calcium scores (≥1,000) face an extremely elevated short-term risk of hard coronary events, with annualized event rates significantly exceeding those observed in patients with severe myocardial perfusion imaging abnormalities. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To assess the natural history and short-term incidence of hard coronary events in asymptomatic individuals with very high coronary calcium scores (≥1,000) on screening electron beam tomography.

August 15, 2026Journal of the American College of CardiologyOpen Access

High coronary artery calcium scores pose an extremely elevated risk for hard events

Q: What are the key findings of this study?

Asymptomatic individuals with a calcium score ≥1,000 had a higher annualized rate of hard coronary events than historical controls with severe MPI abnormalities (25% vs 7.4%, P<0.0001).

Q: What is the clinical evidence from this study?

Study design: Cohort. Population: Asymptomatic with very high coronary calcium scores (n=98). Intervention: Calcium score >= 1,000 vs. Historical controls with severe abnormalities on myocardial perfusion imaging (MPI). Primary outcome: Hard coronary events (myocardial infarction or coronary death) (p=<0.0001).

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Key result

Asymptomatic CAC ≥1,000 links to ~238% higher annualized hard coronary event rates vs severe MPI abnormalities.

P<0.0001
n=98

Why the study?

The prognostic significance of coronary calcium remained controversial, as some believed calcification may stabilize atherosclerotic plaques.

Does a very high coronary calcium score (>= 1,000) on screening EBT predict hard coronary events in asymptomatic individuals compared to severe perfusion abnormalities on MPI?

Comparison

Asymptomatic cohort with calcium score >= 1,000 vs historical controls with severe MPI abnormalities

Design

Prospective cohort study

Follow-up

Average 17 +/- 11 months

Authors

RWRoberto WayhsUniversity of Illinois Chicago AZAllan ZelingerUniversity of Illinois Chicago PRPaolo RaggiCardiac Imaging

Discussion

Member takes

Implication

Asymptomatic CAC ≥1000 may support intensive prevention now; leaves open whether ischemia testing improves hard outcomes.

Key Points

To assess the natural history and short-term incidence of hard coronary events in asymptomatic individuals with very high coronary calcium scores (≥1,000) on screening electron beam tomography.
Prospective cohort study of N=98 asymptomatic subjects (mean age: 62 ± 10 years) with baseline coronary calcium scores ≥1,000 detected via screening electron beam tomography.
Participants received no subsequent invasive or noninvasive testing and were followed for a mean of 17 ± 11 months (range: 4 to 36 months) for hard coronary events (myocardial infarction or coronary death).
Hard coronary events occurred in 36% (35/98) of participants, with all events recorded within the first 28 months of follow-up.
Subjects experiencing hard coronary events had significantly higher baseline calcium scores than those remaining event-free (1,561 ± 270 vs. 1,199 ± 200, p < 0.001).
The annualized event rate for subjects with calcium scores ≥1,000 was 25%, significantly higher than the 7.4% rate observed in historical controls with severe myocardial perfusion imaging abnormalities (p < 0.0001).

Study Design

Type

Cohort (n=98)

Structured PICO

Does a very high coronary calcium score (>= 1,000) on screening EBT predict hard coronary events in asymptomatic individuals compared to severe perfusion abnormalities on MPI?

Population

98 asymptomatic subjects with a very high calcium score (>= 1,000) on screening EBT, followed for an average of 17 months.

Exposure

Very high coronary calcium score (>= 1,000) detected on screening electron beam tomography (EBT)

Comparator

Historical controls with severe abnormalities on myocardial perfusion imaging (MPI)

Outcome

Hard coronary events (HCEs), defined as myocardial infarction or coronary deathhard clinical

Main Result

Absolute Event Rate: 25% vs 7.4%

p-value: p=<0.0001

Asymptomatic individuals with a coronary calcium score >= 1,000 have an extremely high short-term risk of hard coronary events, exceeding the risk associated with severe perfusion abnormalities on MPI.

Cite This Study

Wayhs et al. (2002) conducted a cohort in Asymptomatic with very high coronary calcium scores (n=98). Calcium score >= 1,000 vs. Historical controls with severe abnormalities on myocardial perfusion imaging (MPI) was evaluated on Hard coronary events (myocardial infarction or coronary death) (p=<0.0001). Asymptomatic individuals with a calcium score ≥1,000 had a higher annualized rate of hard coronary events than historical controls with severe MPI abnormalities (25% vs 7.4%, P<0.0001).

synapsesocial.com/papers/6a7fdaa6fcbf2b1afafe78d9 https://doi.org/10.1016/s0735-1097(01)01737-5

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High coronary artery calcium scores pose an extremely elevated risk for hard events

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

High coronary artery calcium scores pose an extremely elevated risk for hard events

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Also Consider

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