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Ischemia With Nonobstructive Coronary Artery Disease: Concept, Assessment, and Management
Doyeon Hwang1, Sang-Hyeon Park1, Bon-Kwon Koo1
1Department of Internal Medicine and Cardiovascular Center, Seoul National University Hospital, Seoul, Korea.
Insights
Ischemia with nonobstructive coronary arteries (INOCA) causes chest pain and poor outcomes. Invasive tests are crucial for diagnosing INOCA and guiding mechanism-specific treatments for better patient management.
Area of Science:
- Cardiology
- Cardiovascular Medicine
- Clinical Diagnostics
Background:
- Physicians frequently see patients with angina or myocardial ischemia but no obstructive coronary artery disease.
- This condition, known as ischemia with nonobstructive coronary arteries (INOCA), leads to recurrent chest pain and adverse outcomes.
- Understanding INOCA's diverse mechanisms is vital for effective patient management.
Purpose of the Study:
- To highlight the importance of identifying INOCA.
- To emphasize the need for discriminating the underlying mechanisms of INOCA.
- To establish invasive assessment as a key diagnostic and management strategy.
Main Methods:
- Invasive physiologic assessment is the primary diagnostic step for INOCA.
- Provocation tests are used to identify vasospastic components in INOCA patients.
- Comprehensive data from invasive tests inform mechanism-specific treatment plans.
Main Results:
- Invasive assessments are essential for diagnosing INOCA.
- Provocation tests aid in identifying vasospasm as a cause of INOCA.
- Detailed invasive findings enable tailored therapeutic strategies.
Conclusions:
- Accurate diagnosis of INOCA and its specific mechanisms are clinically significant.
- Invasive testing provides a framework for personalized INOCA management.
- Mechanism-specific treatment based on invasive findings can improve outcomes for INOCA patients.
Abstract:
In daily clinical practice, physicians often encounter patients with angina or those with evidence of myocardial ischemia from noninvasive tests but not having obstructive coronary artery disease. This type of ischemic heart disease is referred to as ischemia with nonobstructive coronary arteries (INOCA). INOCA patients often suffer from recurrent chest pain without adequate management and are associated with poor clinical outcomes. There are several endotypes of INOCA, and each endotype should be treated based on its specific underlying mechanism. Therefore, identifying INOCA and discriminating its underlying mechanisms are important issues and of clinical interest. Invasive physiologic assessment is the first step in the diagnosis of INOCA and discriminating the underlying mechanism; additional provocation tests help physicians identify the vasospastic component in INOCA patients. Comprehensive information acquired from these invasive tests can provide a template for mechanism-specific management for patients with INOCA.
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