AccScience Publishing / BH / Online First / DOI: 10.36922/BH025330045
REVIEW ARTICLE

Beyond the blockage: A review of myocardial infarction with non-obstructive coronary arteries

Sai Lokesh Moraboina1 Mehreen Junaid2 Kalpana Kumari3 Jeevan Kumar Sahni4 Suman Khatri5 Umme Aiman6 Varsha Miriyala7 Yusra Jumani8 Ali Athar9*
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1 Department of Medicine, Faculty of Medicine, Apollo Institute of Medical Sciences and Research, Chittoor, Andhra Pradesh, India
2 Department of Medicine, Faculty of Medicine, C.M.H. Lahore Medical College, Lahore, Punjab, Pakistan
3 Department of Pharmaceutical Sciences, Dow College of Pharmacy, Dow University of Health Sciences, Karachi, Sindh, Pakistan
4 Department of Medicine, Faculty of Medicine, Medical Academy named after S.I. Georgievsky, Vernadsky Crimean Federal University, Simferopol, Crimea, Russia
5 Department of Medicine, Faculty of Medicine, TMSS Medical College, Bogura, Rajshahi, Bangladesh
6 Department of Medicine, Faculty of Medicine, Bhaskar Medical College, Hyderabad, Telangana, India
7 Department of Medicine, Faculty of Medicine, Miller School of Medicine, University of Miami, Miami, Florida, United States of America
8 Department of Medicine, Faculty of Medicine, Dow International Medical College, Karachi, Sindh, Pakistan
9 Department of Medicine, Faculty of Medicine, Shalamar Medical and Dental College, Lahore, Punjab, Pakistan
Brain & Heart, 025330045 https://doi.org/10.36922/BH025330045
Received: 11 August 2025 | Revised: 3 October 2025 | Accepted: 27 October 2025 | Published online: 14 November 2025
© 2025 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

Myocardial infarction with non-obstructive coronary arteries (MINOCA) is a syndrome in which patients have clear signs of heart muscle injury but show <50% stenosis on coronary angiography. We recognize it as a distinct condition that demands its own diagnostic and treatment approaches. Recent studies were reviewed to elucidate the pathophysiology, diagnostic criteria, and management strategies for MINOCA. PubMed, Scopus, and Google Scholar were searched for full-text, peer-reviewed articles on MINOCA’s pathophysiology and diagnostics. Keywords such as “non-obstructive coronary artery,” “ischemic heart diseases,” and “myocardial infarction” were used. Following the screening and synthesis of the selected papers, we found that MINOCA can result from ischemic causes—plaque disruption, vasospasm, microvascular dysfunction, spontaneous coronary artery dissection, and coronary embolism—as well as from non-ischemic causes, such as myocarditis and Takotsubo cardiomyopathy. The diagnostic evaluation of MINOCA relies on high-sensitivity troponin assays, coronary angiography, cardiac magnetic resonance (CMR) imaging, optical coherence tomography, and functional testing for vasomotor disorders. There are emerging biomarkers, including microRNAs, copeptin, and soluble suppression of tumorigenicity-2, that help refine the risk assessment. We concluded that MINOCA requires a stepwise diagnostic algorithm and personalized treatment methods tailored to the underlying cause, while advocating for early use of CMR imaging, targeted imaging or functional tests, and long-term follow-up. Future randomized trials are warranted to validate etiology-specific therapies and imaging-guided management strategies.

Keywords
Myocardial infarction
Non-obstructive coronary artery disease
Biomarkers
Heart muscle injury
Coronary vasospasm
Funding
None.
Conflict of interest
The authors declare they have no competing interests.
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Brain & Heart, Electronic ISSN: 2972-4139 Published by AccScience Publishing