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the claim

Heart attacks can occur without any blocked arteries

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Heart attacks can indeed occur without blocked arteries, a condition clinically recognized as myocardial infarction with nonobstructive coronary arteries (MINOCA).

The analysis

Multiple retrieved papers discuss MINOCA (Myocardial Infarction with Nonobstructive Coronary Arteries), confirming that heart attacks can occur through mechanisms other than obstructive coronary artery disease, such as vasospasm, microvascular dysfunction, and spontaneous coronary artery dissection.

Evidence for · 3
Recorded source metadata

Trimarchi G, Teresi L, Licordari R, Pingitore A, Pizzino F, Grimaldi P, Calabrò D, Liotta P, Micari A, de Gregorio C, Di Bella G. Transient Left Ventricular Dysfunction from Cardiomyopathies to Myocardial Viability: When and Why Cardiac Function Recovers.. 2024. https://doi.org/10.3390/biomedicines12051051

Discusses myocardial infarction with non-obstructive coronary arteries (MINOCA) as a condition leading to ventricular dysfunction without typical epicardial blockages.

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More for · 2
Recorded source metadata

Yang P, Zhang S, Yin X, Zhang Y, Zhu H, Cao Y, Shen C. Myocardial infarction with nonobstructive coronary arteries (MINOCA): a narrative review.. 2025. https://doi.org/10.1186/s40001-025-02703-3

Defines MINOCA as myocardial infarction cases occurring with less than 50% narrowing of the coronary arteries.

Recorded source metadata

Chiara Tognola, Alessandro Maloberti, Marisa Varrenti, Patrizio Mazzone, Cristina Giannattasio, Fabrizio Guarracini. Myocardial Infarction with Nonobstructive Coronary Arteries (MINOCA): Unveiling Sex-Specific Differences in Pathophysiology, Diagnosis, and Management. 2025. https://doi.org/10.20944/preprints202502.1620.v1

Characterizes MINOCA as myocardial injury without significant coronary artery obstruction due to diverse mechanisms like vasospasm or microvascular dysfunction.

The paper trail · every fact has a biography
first checked02 Aug 2026
judged → SUPPORTED · 8402 Aug 2026
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