This study is enrolling subjects with coronary artery disease (blockages in the arteries that supply blood to the heart) who need to undergo a procedure called a Percutaneous Coronary Intervention (PCI) to open up a blocked heart artery. At times, a heart pump is used during a PCI to help reduce the work the heart during the procedure. This study is evaluating a heart pump called the KARDION CORY P4 pump. The KARDION CORY P4 pump is investigational meaning it has not been approved for commercial use by the Food and Drug Administration (FDA). This study will randomize subjects, meaning assign by chance, to receive either the KARDION CORY P4 pump or the Impella CP, which is commercially available.

Study participation will last about 30 days and include up to 6 visits. The study includes blood work, questionnaires, an electrocardiogram (ECG) - a tracing of the heart's electrical activity and an echocardiogram (Echo) - an ultrasound test of the heart.

Risks include risks related to the study device including bleeding, infection, and injury to the blood vessel where the device is placed. There are also risks related to study procedures. There may be benefit and the information learned may benefit others in the future.

This study is evaluating the clinical safety and efficacy of Prevail Drug-Coated Balloon (DCB) in the treatment of in-stent restenosis (ISR) which is the narrowing of heart arteries (blood vessels) previously treated with stents (mesh like medical device that helps keep arteries open) and in new narrowing of arteries in small vessels. The DCB is a small balloon that has medication on it. The medication is designed to reduce the re-occurrence of narrowing in blood vessels. All participants who have a previous stent will be chosen at random to be treated with either the Prevail DCB or the Agent DCB. You will have a 50:50 chance of being assigned to either DCB. The Prevail DCB is considered investigational meaning it has not yet been approved by the Food and Drug Administration (FDA). The Agent DCB is FDA approved. If you are being treated due to a new lesion in a small blood vessel, you will be treated with the Prevail DCB. Study related procedures include the following: electrocardiograph (known as an ECG, which is a test that shows your heart's electrical activity), blood draws, physical examinations, a review of chest pain, and medication history. Participation in this study will take about 5 years and include about 9 visits. Risks include risks related to the DCBs including allergic reaction, GI symptoms or changes to blood counts.