Final answer:
The recommended antiplatelet therapy for stable coronary artery disease undergoing PCI (elective) is clopidogrel in combination with aspirin.
Step-by-step explanation:
For stable coronary artery disease undergoing PCI (elective), the recommended antiplatelet therapy is clopidogrel in combination with aspirin. This combination therapy, also known as dual antiplatelet therapy (DAPT), has been shown to reduce cardiovascular events more effectively than aspirin alone in patients with acute events like a ST-segment elevation myocardial infarction (STEMI).