Abstract: At least one location of interest for perpetuation or persistence of arrhythmia or atrial fibrillation is identified by determining a repeatability of electrogram morphologies from electrical recordings within at least one atrium.

Abstract: Described here are systems and methods for producing an image that depicts blood flow stasis using magnetic resonance imaging (MRI), Doppler echocardiography, or other medical instruments for measuring flow velocities in a human body. A time series of three-dimensional (3D) image volumes is provided, where this time series of 3D image volumes contains flow velocity information at voxel locations in a 3D volume in a subject. One or more regions-of-interest are then segmented from the 3D image volumes. For each voxel in the regions-of-interest, velocity magnitudes are calculated. Using the velocity magnitudes, a flow stasis volume is produced by computing a relative stasis value for each voxel location in the corresponding region-of-interest. This flow stasis volume can be provided as a 3D flow stasis image, or a flow stasis map can be produced by projecting the flow stasis volume onto a two-dimensional (2D) plane.

Abstract: Described here are systems and methods for producing an image that depicts blood flow stasis using magnetic resonance imaging (MRI), Doppler echocardiography, or other medical instruments for measuring flow velocities in a human body. A time series of three-dimensional (3D) image volumes is provided, where this time series of 3D image volumes contains flow velocity information at voxel locations in a 3D volume in a subject. One or more regions-of-interest are then segmented from the 3D image volumes. For each voxel in the regions-of-interest, velocity magnitudes are calculated. Using the velocity magnitudes, a flow stasis volume is produced by computing a relative stasis value for each voxel location in the corresponding region-of-interest. This flow stasis volume can be provided as a 3D flow stasis image, or a flow stasis map can be produced by projecting the flow stasis volume onto a two-dimensional (2D) plane.

Abstract: At least one location of interest for perpetuation or persistence of arrhythmia or atrial fibrillation is identified by determining a repeatability of electrogram morphologies from electrical recordings within at least one atrium.

Abstract: The present invention provides devices and methods for preventing or significantly reducing the risk of thrombus formation. More specifically, the devices and methods of the present invention provide energy to blood flowing within a chamber or vessel to prevent or reduce blood stasis and thereby prevent or significantly reduce the risk of thrombus formation. The present invention is ideally suited for prevention or reduction of risk of blood clot formation in the atria in patients with atrial fibrillation, in blood vessels of patients at risk of clot formation, in areas adjacent to, or on, artificial heart valves or other artificial cardiovascular devices, and the like.

Abstract: The present invention provides devices and methods for preventing or significantly reducing the risk of thrombus formation. More specifically, the devices and methods of the present invention provide energy to blood flowing within a chamber or vessel to prevent or reduce blood stasis and thereby prevent or significantly reduce the risk of thrombus formation. The present invention is ideally suited for prevention or reduction of risk of blood clot formation in the atria in patients with atrial fibrillation, in blood vessels of patients at risk of clot formation, in areas adjacent to, or on, artificial heart valves or other artificial cardiovascular devices, and the like.