The<unk>  <unk>  uses "counterpulsation in which a<unk> ing unit synchronized with the patient's electrocardiogram rapidly fills a balloon in the aorta with helium or carbon dioxide in early diastole and evacuates the balloon at the onset of systole. As the balloon inflates, it raises<unk>  diastolic pressure, and as it deflates, it lowers<unk>  systolic pressure. The result is a decrease in left ventricular work and increased myocardial and peripheral perfusion." <unk> s are a type of assisted circulation<unk>  is used to decrease myocardial oxygen demand while at the same time increasing cardiac output. that used counterpulsation. By increasing cardiac output it also increases coronary blood flow and therefore myocardial oxygen delivery. It consists of a cylindrical balloon that sits in the aorta. That is, it actively deflates in systole increasing forward blood flow by reducing afterload, and actively inflates in diastole increasing blood flow to the coronary arteries.
Intra-aortic balloon pump
Pericardial window
Median sternotomy
Ventricular assist device
Pericardiectomy
Intravascular ultrasound
Inferior vena cava filter
Balloon catheter