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Prognostic Implication of Non-Obstructive Coronary Lesions: A New Classification in Different Settings
Jorge Rodríguez-Capitán1, Andrés Sánchez-Pérez1, Sara Ballesteros-Pradas2
1Área del Corazón, UMA Campus de Teatinos S/N, Hospital Universitario Virgen de la Victoria, CIBERCV, IBIMA, 29010 Málaga, Spain.
Journal of Clinical Medicine
|April 30, 2021
Summary
Non-obstructive coronary artery disease indicates a worse long-term cardiovascular prognosis. This finding is particularly significant for non-diabetics, women, and patients with acute coronary syndrome.
Area of Science:
- Cardiology
- Vascular Medicine
- Epidemiology
Background:
- The clinical significance of non-obstructive coronary artery disease (CAD) remains debated.
- Evaluating long-term cardiovascular outcomes in this patient group is crucial for risk stratification and management.
- Existing research often focuses on obstructive CAD, leaving a gap in understanding non-obstructive disease prognosis.
Purpose of the Study:
- To assess the long-term cardiovascular prognosis of patients with non-obstructive CAD.
- To stratify prognosis based on sex, diabetes status, and clinical indication for coronary angiography.
- To compare outcomes between normal coronary arteries, non-obstructive CAD (20-50% stenosis), and obstructive CAD (>70% stenosis).
Main Methods:
- Multi-center retrospective longitudinal observational study.
- Inclusion of 3265 patients undergoing coronary angiography.
- Follow-up of combined cardiovascular events (myocardial infarction, stroke, heart failure hospitalization, cardiovascular death) over a mean of 43 months.
Main Results:
- Non-obstructive CAD was associated with a significantly worse long-term cardiovascular prognosis compared to normal coronary arteries (HR 1.72).
- This increased risk was pronounced in non-diabetic patients (HR 2.12), women (HR 1.75), and those with a history of acute coronary syndrome (HR 2.07).
- A clear trend of worsening prognosis with increasing coronary artery stenosis severity was observed (p for trend <0.001).
Conclusions:
- Non-obstructive coronary artery disease is linked to an impaired long-term cardiovascular prognosis.
- The adverse association is particularly evident in specific subgroups: non-diabetics, women, and post-acute coronary syndrome patients.
- These findings underscore the importance of considering non-obstructive CAD as a significant risk factor for future cardiovascular events.
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