Provocation of coronary artery spasm.

Area of Science:

• Cardiology
• Pharmacology

Background:

• Prinzmetal's variant angina involves coronary artery spasm.
• Various agents can trigger spasm, necessitating diagnostic testing.

Purpose of the Study:

• To evaluate the safety and efficacy of ergonovine maleate testing.
• To explore the role of calcium channel antagonists in managing coronary spasm.

Main Methods:

• Structured protocol for ergonovine maleate testing.
• Electrocardiographic monitoring during testing.
• Immediate spasm reversal with nitroglycerin.

Main Results:

• Ergonovine maleate testing, under a strict protocol, is the safest provocative method.
• Calcium channel antagonists effectively block focal coronary artery spasm.

Conclusions:

• A structured ergonovine maleate testing protocol ensures patient safety.
• Calcium channel antagonists show promise in preventing the need for provocative testing in the future.