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[Diagnosis of the dynamic lesion]
E Fleck1, W Auch-Schwelk, E Frantz
1Klinik für Innere Medizin-Kardiologie, Deutsches Herzzentrum Berlin.
Insights
Diagnosing vasospastic angina, a localized vascular smooth muscle disease, relies on angiographical functional tests. While ergonovine is established, acetylcholine is under investigation for diagnosing these dynamic coronary artery lesions.
Area of Science:
- Cardiology
- Vascular Biology
- Pharmacology
Context:
- Coronary artery lesions result from plaque rupture, thrombosis, and spastic contractions.
- Vasospastic angina is increasingly recognized as a localized vascular smooth muscle disease.
- This condition can affect both atherosclerotic and non-atherosclerotic arterial segments.
Purpose:
- To review the diagnostic approaches for vasospastic lesions in coronary arteries.
- To highlight the current diagnostic limitations and ongoing research in vasospasm detection.
- To emphasize the importance of accurate diagnosis for improved patient prognosis.
Summary:
- Current diagnosis of vasospastic angina requires functional tests under angiographical control.
- Pharmacological provocation tests, such as ergonovine and acetylcholine, are used.
- Pathophysiological mechanisms of vasospasm are not fully understood, necessitating empirical diagnostic methods.
- Reproducibility of disease course and lesion localization requires further investigation.
Impact:
- Accurate diagnosis of vasospastic angina improves patient prognosis.
- Effective therapies, including calcium channel blockers and nitrates, are available.
- Understanding vasospastic mechanisms can lead to more targeted treatments.
Abstract:
Rupture of atheromatous plaques, thrombosis and spastic contractions cause dynamic lesions in coronary arteries. This review focuses on the diagnostic approach to vasospastic lesions. Our current knowledge considers vasospastic angina as a--most likely--localized disease of the vascular smooth muscle, which occurs in nonatherosclerotic as well as in atherosclerotic segments. Currently the diagnosis can only be proven by functional tests under angiographical control. Since the pathophysiological mechanisms leading to vasospasm remain unclear, only empirically developed pharmacological tests are available. The use of ergonovine alkaloids is well established, the feasibility of acetylcholine is under investigation. The reproducibility regarding the course of the disease and the localization of the lesion has not yet been determined. The necessity to state the diagnosis is given by the improved prognosis of the disease under effective therapy with calcium channel blockers and nitrates.