Abstract: A method for diagnosing arrhythmia focus in the heart of a patient comprising: affixing electrodes to a patient; providing a wearable monitor and connecting the electrodes to a wearable monitor; monitoring the patient by the wearable monitor for a monitoring period to produce a wearable ECG waveform; disconnecting the wearable monitor from the electrodes while leaving the electrodes affixed to the patient or marking the positions of these electrodes; providing a waveform analyzer running on a computer; importing the wearable ECG waveform into the waveform analyzer; defining a composite arrhythmia waveform from the wearable ECG waveform; providing an EP lab ECG and connecting the electrode stickers to the EP lab ECG or connecting new stickers to the marked positions; pacing the heart of the patient using a pacing catheter; and comparing the paced ECG waveform provided by the EP lab ECG with the composite arrhythmia waveform to diagnose the arrhythmia focus.

Abstract: Apparatus is provided, including a housing (22), configured for insertion into a body of a patient; a photosynthetic oxygen supply (24) configured to supply oxygen; and functional cells (30), coupled to the housing (22). The functional cells (30) are adapted to receive the oxygen and to secrete at least one factor that induces vascularization in a vicinity of the housing (22) when the housing (22) is in the body of the patient. Other embodiments are also described.

Abstract: Apparatus (20) is provided for implantation into a body of a subject, including isolated functional cells (28). At least one first barrier (22) having a first molecular weight cutoff is disposed with respect to the functional cells so as to protect the functional cells from components disposed within body fluid of the subject having molecular weights higher than the first cutoff. Photosynthetic elements (26) are disposed with respect to the functional cells so as to provide oxygen thereto. At least one second barrier (24) has a second molecular weight cutoff that is lower than the first cutoff. The second barrier is disposed with respect to the photosynthetic elements so as to protect the photosynthetic elements from components disposed within the body fluid of the subject having molecular weights higher than the second cutoff. Other embodiments are also described.

Abstract: Apparatus is provided, including a housing (22), configured for insertion into a body of a patient; a photosynthetic oxygen supply (24) configured to supply oxygen; and functional cells (30), coupled to the housing (22). The functional cells (30) are adapted to receive the oxygen and to secrete at least one factor that induces vascularization in a vicinity of the housing (22) when the housing (22) is in the body of the patient. Other embodiments are also described.