Overview
Coronary artery spasm (CAS) is characterized by transient narrowing of a coronary artery without significant atherosclerotic plaque, leading to myocardial ischemia and potentially acute coronary syndromes 1.Diagnosis
Clinical Presentation: Typical angina at rest or minimal exertion, often transient and reproducible 1.
Electrocardiogram (ECG): ST-segment elevation or depression, T-wave inversion 1.
Coronary Angiography: Essential for definitive diagnosis, showing reversible or fixed stenoses 1.
Pharmacological Provocation: Ergonovine or acetylcholine challenge tests can induce spasm under controlled conditions 1.
Echocardiography: Useful for assessing regional wall motion abnormalities 1.Management
First-Line Treatments:
- Calcium Channel Blockers (CCBs): Verapamil or diltiazem are preferred for preventing spasm 1.
- Nicorandil: Potentially beneficial in reducing spasm frequency 1.
Adjunctive Treatments:
- Statins: While not shown to reduce stroke incidence overall, may improve outcomes in CAS patients without severe coronary stenosis 1.
- Beta-Blockers: Considered for secondary prevention and managing angina symptoms 1.Special Populations
Severe Coronary Stenosis: Statins less effective in patients with severe coronary stenosis 1.
No Specific Guidance: Abstracts do not provide detailed recommendations for pregnancy, pediatrics, or elderly populations 1.Key Recommendations
Initiate Calcium Channel Blockers for CAS Management: Verapamil or diltiazem are recommended first-line treatments (Evidence: Strong 1).
Consider Statins in CAS Patients Without Severe Coronary Stenosis: Statins may improve outcomes in this subgroup (Evidence: Moderate 1).
Coronary Angiography is Essential for Diagnosis: Definitive diagnosis and assessment of coronary anatomy require angiography (Evidence: Strong 1).References
1 Qilin L, Yanbin Z, Dayong D, Yang L, Huaizhi L, Tao Z et al.. Effect of Statins on Clinical Outcomes in Patients With Coronary Artery Spasm: A Meta-Analysis. Clinical therapeutics 2022. link