Is there a role for provocation testing to diagnose coronary artery spasm?

Area of Science:

• Cardiology
• Clinical Medicine

Background:

• Spontaneous coronary artery spasm is a significant cause of morbidity.
• It affects patients with coronary artery disease and variant angina.
• Pharmacological agents can provoke spasm in susceptible individuals.

Purpose of the Study:

• To evaluate the role and controversy surrounding provocation testing in diagnosing coronary artery spasm.
• To assess the sensitivity and specificity of provocation testing.
• To determine the impact of provocation testing on patient prognosis and therapy.

Main Methods:

• Review of existing literature and clinical practices regarding coronary artery spasm provocation testing.
• Analysis of the sensitivity and specificity of provocation tests in identifying variant angina and active coronary artery disease.
• Examination of evidence linking test results to prognosis and therapeutic modifications.

Main Results:

• Provocation testing is sensitive for identifying variant angina and active disease, though clinical diagnosis is often possible.
• The specificity of these tests for coronary spasm is less clear.
• Limited evidence suggests altering therapy based on positive tests improves prognosis.

Conclusions:

• Provocation testing may aid in diagnosing variant angina but its widespread use is not recommended for undiagnosed chest pain.
• A potential role exists for refractory cases to guide coronary stenting.
• Clinical diagnosis is often sufficient, and test specificity requires further clarification.