An intra-aortic dual balloon driving pump catheter device having a catheter; a first balloon and a second balloon respectively surrounding the catheter, being arranged successively along the longitudinal direction of the catheter, wherein the position of the first balloon is placed at the distal end of the catheter, and the second balloon is placed immediately adjacent to the proximal end of the first balloon; the first balloon and the second balloon are periodically expanded to a dimension that nearly blocks the aortic blood flow and contracted to a dimension that does not prevent the blood flow from passing through; wherein the first balloon periodically inflates in diastole and deflates in systole working as a pump, while the second balloon conversely deflates in systole and inflates in diastole functioning as a valve, altogether leading to blood pumping from contracting ventricle and keeping driving forward ahead in the aorta.

A pumping system (200) for controlling the flow of interatrial blood comprises, housed inside a container (201), a control element (30, 30′, 30″) of the interatrial blood flow. The control element comprises: at least one worm screw (31), the rotation of which creates a two-way flow of interatrial blood; or a pair of counter-rotating propellers (31′); or a pair of membranes (31″) whose deformation creates a two-way flow of interatrial blood; or a flexible structure (31″) whose change in volume within the container (201) creates a two-way flow of interatrial blood.

Some systems and methods for treating heart tissue may include instruments for intermittently occluding the coronary sinus using a coronary sinus occlusion catheter device. In some embodiments, the coronary sinus occlusion catheter can be used before or during a coronary intervention procedure in which a blockage in a heart is repaired or removed.

An implantable ventricular assist device comprises an intraventricular stent used for the creation of an artificial chamber inside the ventricle, a balloon-like structure used to drive the change of the artificial chamber between a contractile configuration and a diastolic configuration, a power system used for driving the change of the balloon-like structure between the contractile configuration and the diastolic configuration. There is also a power system and a mechanical design to operate the system working, wherein in the contractile configuration, the balloon-like structure expands and occupies the space of the artificial chamber and drives the blood inside the artificial chamber flow outside the artificial chamber, wherein in the diastolic configuration, the balloon-like structure shrinks and releases the space inside the artificial chamber, and the blood outside the artificial chamber flows back into the artificial chamber. It is easy to reach the goal of cardiac function.

An implantable ventricular assist device comprises an intraventricular stent used for the creation of an artificial chamber inside the ventricle, a balloon-like structure used to drive the change of the artificial chamber between a contractile configuration and a diastolic configuration, a power system used for driving the change of the balloon-like structure between the contractile configuration and the diastolic configuration. There is also a power system and a mechanical design to operate the system working, wherein in the contractile configuration, the balloon-like structure expands and occupies the space of the artificial chamber and drives the blood inside the artificial chamber flow outside the artificial chamber, wherein in the diastolic configuration, the balloon-like structure shrinks and releases the space inside the artificial chamber, and the blood outside the artificial chamber flows back into the artificial chamber. It is easy to reach the goal of cardiac function.

An intra-aortic balloon pumping device and a method of assembling an intra-aortic balloon pumping device. The device includes a catheter with a separated first and second lumen for driving a first balloon with a relatively large outer diameter and a second balloon with a smaller outer diameter than the aorta when inflated, as well as a single driver unit that is coupled to the first and second lumen for pumping a driving gas into and out from each individual lumen to inflate and deflate the first and second balloons in sequence. The ratio of cross-sectional area of each lumen and the balloon volumes are dimensioned in such way that the sequence is optimized. In one form, the second lumen is a short aperture, located only between adjacent chambers that are formed by the first and second balloons.

Several embodiments of a catheter are described, having a balloon configured to slowly inflate and then quickly deflate to create an area of low pressure in the vessels. The balloon can be cycled near the vessels of the kidneys, thereby helping to draw out blood from the kidneys and enhance fluid processing to the bladder.

In a method for intermittently occluding the coronary sinus, in which the coronary sinus is occluded using an occlusion device, the fluid pressure in the occluded coronary sinus is continuously measured and stored, the fluid pressure curve is determined as a function of time, and the occlusion of the coronary sinus is triggered and/or released as a function of at least one characteristic value derived from the measured pressure values. The pressure increase and/or pressure decrease per time unit each occurring at a heart beat are used as characteristic values.

Devices, systems, and methods for providing retroperfusion to at least one ischemic tissue in a minimally invasive manner are disclosed. At least some of the embodiments disclosed herein enable an anastomosis to be formed between a vein and an artery without the use of sutures and through a non-invasive procedure. In addition, various disclosed embodiments provide a cannula device comprising a Y-configuration for bifurcating arterial flow between an anastomosis and the underlying artery. The devices, systems and methods herein can further provide simultaneous autoretroperfusion therapy to more than one area of an ischemic tissue.

Cardiac chamber prosthesis configured to be implanted in a cardiac chamber (10; 20; 30; 40) comprising a native outlet valve (50; 60; 70; 80) and at least one inlet aperture (50; 70) selected from the group comprising a native inlet valve (50; 70) and one or more outlet mouths of venae cavae or pulmonary veins (120; 125; 130), wherein the cardiac chamber prosthesis comprises: an inner elastic membrane (250; 255; 260; 650; 750; 850), a reference support elastic membrane structure (200; 205, 225, 290A; 600; 700; 800) comprising or consisting of an outer elastic membrane (200; 205; 600; 700; 800) provided with a plurality of clips (210) configured to grip an inner wall (45) of the cardiac chamber (10; 20; 30; 40), wherein the elastic inner and outer membranes (250, 200; 255, 205; 260, 200; 650, 600; 750, 700; 850, 800) form an outlet border (285; 675; 785; 885) configured to surround and be sutured on the native outlet valve (50; 60; 70; 80) and at least one inlet border (275; 685; 775; 875A, 875B) configured to surround and be sutured on said at least one inlet aperture (50; 70), wherein the inner elastic membrane (250; 255; 260; 650; 750; 850) and the reference support elastic membrane structure (200; 205, 225, 290A; 600; 700; 800) are connected to each other by means of a plurality of primary variable connection elements (290; 290B), whereby the inner elastic membrane (250; 255; 260; 650; 750; 850) and the reference support elastic membrane structure (200; 205, 225, 290A; 600; 700; 800) delimit a primary interspace (230; 230B; 630; 730; 830) between them that is configured to receive a fluid with varying amount and/or pressure so as to dynamically modify a volume of the primary interspace (230; 2303; 630; 730; 830) and said elastically variable volume delimited by the inner surface (254; 654; 754; 854) of the inner elastic membrane (250; 255; 260; 650; 750; 850).