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[Transitory appearance of collateral circulation during coronary spasm]
Archives Des Maladies Du Coeur Et Des Vaisseaux
|November 1, 1984
Summary
This case study highlights coronary artery spasm during exercise stress testing, presenting with ST segment changes. A transient collateral system likely mitigated the effects of a blocked dominant right coronary artery.
Area of Science:
- Cardiology
- Clinical Medicine
Background:
- Coronary artery spasm is a reversible narrowing of the coronary arteries.
- Exercise stress testing is a common diagnostic tool for ischemic heart disease.
Observation:
- A patient exhibited ST segment depression followed by ST elevation during recovery on exercise stress testing.
- Coronary angiography revealed a significant, transient collateral system from the left coronary artery.
Findings:
- The collateral system appeared to minimize the impact of a complete occlusion in the dominant right coronary artery.
- Effort-induced coronary artery spasm was a key characteristic.
Implications:
- Understanding collateral circulation is crucial in managing coronary artery disease.
- This case illustrates the complex interplay between spasm, occlusion, and collateral supply.