Abstract: Apparatus and methods for dynamical tracking of movement of cells and cell groups within cell populations using magnetic resonance imaging are provided.

Abstract: Apparatus and methods for dynamical tracking of movement of cells and cell groups within cell populations using magnetic resonance imaging are provided.

Abstract: Methods are provided herein for treating cardiac arrhythmias, such as for treating an arrhythmia syndrome, for example Brugada syndrome, in a subject. In some embodiments, the methods include selecting a subject with Brugada syndrome and administering to the subject an effective amount of an agent that increases the expression or activity of SIRT1 in the subject. In some embodiments, the agent increases Nav1.5 activation. In some embodiments, the agent increases the expression or activity of SRIT1 and increases Nav1.5 activation.

Abstract: Method and system for noncontact electrophysiologic imaging of the heart. The methods may employ the magnetization and its relaxation-based measurements, sensitive or specifically sensitized to the properties of cardiac electrical activity, to determine the spatio-temporal distribution of cardiac electromagnetic field and cardiac electrical potentials, and to display such spatio-temporal distribution (image) for assisting in the identification of the regions with abnormal cardiac electrical activity. In one embodiment, the system uses external magnets, gradient magnetic fields and radio-frequency waves, such as those commonly used for MRI, to generate the magnetic resonance. The system synchronizes scanning to the cardiac cycle using a measure of cardiac activity (e.g.