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Updated: Nov 29, 2025

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
[Ischemia with no obstructive coronary artery disease: microvascular angina and vasospastic angina]
Vincenzo Sucato1, Salvatore Novo1, Girolamo Manno1
1U.O.C. Cardiologia, Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza (ProMISE) "G. D'Alessandro", A.O.U. Policlinico Paolo Giaccone, Università degli Studi, Palermo.
Insights
Ischemia with non-obstructive coronary artery disease (INOCA) affects many patients with chest pain but no blockages. This review clarifies INOCA's causes, diagnosis, and treatments for better patient understanding.
Area of Science:
- Cardiology
- Internal Medicine
- Diagnostic Imaging
Background:
- Coronary angiography reveals normal or near-normal coronary arteries in approximately 40% of patients presenting with chest pain and anginal symptoms.
- This clinical scenario necessitates a standardized approach to myocardial ischemia in stable patients without obstructive coronary artery disease.
Purpose of the Study:
- To summarize and clarify the complex and debated topic of ischemia with non-obstructive coronary artery disease (INOCA).
- To enhance understanding of the pathophysiological, nosographic, diagnostic, and therapeutic aspects of INOCA.
Main Methods:
- Literature review and synthesis of existing research on INOCA.
- Analysis of pathophysiological mechanisms, diagnostic modalities, and therapeutic strategies for INOCA.
Main Results:
- INOCA represents a significant clinical challenge, encompassing diverse etiologies.
- Standardization of diagnostic and therapeutic pathways is crucial for managing INOCA patients.
Conclusions:
- A comprehensive understanding of INOCA is essential for effective patient management.
- Further research is needed to refine diagnostic criteria and therapeutic interventions for INOCA.
Abstract:
About 40% of patients undergoing coronary angiography for chest pain with anginal features have angiographically normal or near-normal coronary arteries. It was necessary to standardize all myocardial ischemia scenarios in stable patients in the absence of coronary artery disease, therefore the term INOCA (ischemia with non-obstructive coronary artery disease) was coined. The aim of this article is to summarize and to clarify the vast and controversial chapter of INOCA, in order to better understand the pathophysiological, nosographic, diagnostic and therapeutic aspects.
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