5) Prinzmetal (Variant Angina)
Is a quite uncommon coronary artery disease in which the coronary arteries constrict and its muscles spasm spontaneously in the form of attacks even at rest. This condition is usually controlled by medications. However, in resistant cases, stent implantation could help reduce the severity of the attacks. PCI may provide some considerable benefits to those experiencing variant angina, however, when the procedure is required is still disputable.