Abstract: Compositions, systems, devices, and methods for performing precise chemical treatment of tissues are disclosed. Systems, devices, and methods for administering a chemical agent to one or more a precise regions within a tissue mass are disclosed. Compositions, systems, devices, and methods for treating targeted regions within a tissue mass are disclosed. Systems, devices, and methods for identifying, localizing, monitoring neural traffic in the vicinity of, quantifying neural traffic in the vicinity of, and mapping neural traffic near targeted regions within a tissue mass are disclosed.

Abstract: Methods and systems are provided for diagnosis and/or treatment of microvascular dysfunction, such as microvascular obstruction (MVO), in which the effects of collateral flow around a treatment site are addressed by injecting volumetric flows into a vessel using an infusion system to prevent or render negligible the collateral flow. Arterial pressures and fluidic flow rates sufficient to negate the collateral flow may be used to indicate the presence and/or severity of MVO for diagnostic and/or therapeutic purposes.

Abstract: Systems, methods and apparatus are included that are configured to model microvascular obstruction (MVO) in patients. According to one aspect of the present disclosure, a multi-scale model is configured to mimic myocardial microcirculation of coronary vessels. The model includes collaterals configured to provide alternative pathways possibly bypassing the MVO, and configured to model coronary artery compliance for spatially resolved fluid transport through the coronary vessels. The model is configured to simulate the MVO by increasing flow resistance in at least one of the modelled coronary vessels, or by blocking the at least one of the modelled coronary vessels completely. The model is also configured to mimic behavior of fluid transport in the coronary vessels during diagnostics or treatment, to design and optimize therapy protocols for the MVO.

Abstract: Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium, such that an atrial pressure of the atrium resulting from the stimulation is a combination of the atrial pressure resulting from atrial contraction and the passive pressure build-up and is higher than an atrial pressure of the atrium would be without the stimulation, and such that the blood pressure of the patient is reduced.

Abstract: Methods and devices for increasing oxygenation levels in the blood supply and thereby treating the condition of hypoxemia. Multiple approaches such as pressure reduction in the pulmonary circulatory system, reducing triggering mechanisms in the main pulmonary artery and restricting flow in the pulmonary circulatory system are disclosed. Interventions associated with those approaches can including shunting, restrictors, compliance devices, pharmacologic substances, etc.

Abstract: Systems, devices, and methods for performing precise treatment, mapping, and/or testing of tissues are disclosed. Systems, devices, and methods for administering an agent to one or more a precise regions within a tissue mass are disclosed. Systems, devices, and methods for treating targeted regions within a tissue mass are disclosed. Systems, devices, and methods for identifying, localizing, monitoring neural traffic in the vicinity of, quantifying neural traffic in the vicinity of, and mapping neural traffic near targeted regions within a tissue mass are disclosed.

Abstract: MVO is treated by introducing injectate into blood vessels affected by MVO at precise flow rates, while blocking retrograde flow, such that the natural pumping of the heart aids in forcing the injectate into the affected microvessels. Monitoring pressure distal of an occlusion balloon is used to determine treatment effectiveness and heart health.

Abstract: Systems and methods for reducing ventricle filling volume are disclosed. In some embodiments, a stimulation circuit may be used to stimulate a patient's heart to reduce ventricle filling volume or even blood pressure. When the heart is stimulated at a consistent rate to reduce blood pressure, the cardiovascular system may over time adapt to the stimulation and revert back to the higher blood pressure. In some embodiments, the stimulation pattern may be configured to be inconsistent such that the adaptation response of the heart is reduced or even prevented. In some embodiments, a stimulation circuit may be used to stimulate a patient's heart to cause at least a portion of an atrial contraction to occur while the atrioventricular valve is closed. Such an atrial contraction may deposit less blood into the corresponding ventricle than when the atrioventricular valve is opened throughout an atrial contraction.

Abstract: Methods and devices for increasing oxygenation levels in the blood supply and thereby treating the condition of hypoxemia. Multiple approaches such as pressure reduction in the pulmonary circulatory system, reducing triggering mechanisms in the main pulmonary artery and restricting flow in the pulmonary circulatory system are disclosed. Interventions associated with those approaches can including shunting, restrictors, compliance devices, pharmacologic substances, etc.

Abstract: Devices and methods for preventing reperfusion injuries when an occlusion balloon is deflated. A catheter having an infusion lumen exiting the catheter distal of a stent balloon and/or occlusion balloon allows a therapeutic agent to be introduced to a target location to establish desired temperatures and pressures prior to deflation of the balloon such that negative effects of reperfusion are minimized.

Abstract: Systems and methods for controlling blood pressure by controlling atrial pressure and atrial stretch are disclosed. In some embodiments, a stimulation circuit may be configured to deliver a stimulation pulse to at least one cardiac chamber of a heart of a patient, and at least one controller may be configured to execute delivery of one or more stimulation patterns of stimulation pulses to the at least one cardiac chamber, wherein at least one of the stimulation pulses stimulates the heart such that an atrial pressure resulting from atrial contraction of an atrium overlaps in time a passive pressure build-up of the atrium, such that an atrial pressure of the atrium resulting from the stimulation is a combination of the atrial pressure resulting from atrial contraction and the passive pressure build-up and is higher than an atrial pressure of the atrium would be without the stimulation, and such that the blood pressure of the patient is reduced.

Abstract: Using a delivery system, a disk is introduced into a left atrium (LA) of a heart of a subject. The left atrial appendage (LAA) is everted into the LA by, the from within the LAA, grasping tissue of the LAA, and pulling the LAA through an ostium of the LAA and into the LA. Within the LA, the disk is expanded, and the perimeter of the everted LAA is sandwiched between a periphery of the disk and the wall around the ostium such that the everted LAA covers the ostium. The everted LAA is secured covering the ostium by anchoring the periphery of the disk around the perimeter of the everted LAA. Other embodiments are also described.

Abstract: Devices and methods for preventing reperfusion injuries when an occlusion balloon is deflated. A catheter having an infusion lumen exiting the catheter distal of a stent balloon and/or occlusion balloon allows a therapeutic agent to be introduced to a target location to establish desired temperatures and pressures prior to deflation of the balloon such that negative effects of reperfusion are minimized.

Abstract: Devices and methods for determining fluid flow resistance at a targeted location in a bodily fluid vessel by monitoring changes in pressure gradiants across the location while fluid flow is being manipulated by introducing infusate into the target area at different rates.

Abstract: A method includes delivering a composition to a tissue site within a volume of tissue; and at least one of monitoring the effect of the composition on an electrophysiological state of a region in the volume of tissue and monitoring the migration of the composition in the region after delivery to the site; wherein the composition comprises an ablative agent for performing a treatment within a body of a subject and an excipient for limiting migration of at least one of the composition and the ablative agent within the body after delivery to the tissue site.

Abstract: Systems, devices, methods, and kits for monitoring one or more physiologic and/or physical signals from a subject are disclosed. A system including a head mounted display to monitor one or more physiologic signals from the face or head of the subject is disclosed. A method for analyzing an ocular parameter of the subject to determine a sympathetic and a parasympathetic outflow thereto is disclosed.

Abstract: Methods and techniques are disclosed for performing transcatheter procedures on a patient that result in similar blood flow changes to the surgical Blalock-Taussig procedure, the Glenn procedure, and the Fontan procedure. Since these transcatheter procedures do not necessarily involve open chest surgery, they tend to be less traumatic for the patient, quicker and easier to perform, and may result in better patient outcomes.

Abstract: Systems and methods for reducing ventricle filling volume are disclosed. In some embodiments, a stimulation circuit may be used to stimulate a patient's heart to reduce ventricle filling volume or even blood pressure. When the heart is stimulated at a consistent rate to reduce blood pressure, the cardiovascular system may over time adapt to the stimulation and revert back to the higher blood pressure. In some embodiments, the stimulation pattern may be configured to be inconsistent such that the adaptation response of the heart is reduced or even prevented. In some embodiments, a stimulation circuit may be used to stimulate a patient's heart to cause at least a portion of an atrial contraction to occur while the atrioventricular valve is closed. Such an atrial contraction may deposit less blood into the corresponding ventricle than when the atrioventricular valve is opened throughout an atrial contraction.

Abstract: Systems, devices, methods, and kits for monitoring one or more physiologic and/or physical signals from a subject are disclosed. A system including a head mounted display to monitor one or more physiologic signals from the face or head of the subject is disclosed. A method for analyzing an ocular parameter of the subject to determine a sympathetic and a parasympathetic outflow thereto is disclosed.

Abstract: A shunt is described that expands to an hourglass shape. As the shunt expands, both of its ends radially flare outwards relative to its middle section and the length of the shunt foreshortens, which causes the flared ends to engage the tissue surrounding a puncture or aperture within a patient's tissue.