Abstract: A computer-assisted method for quantitative characterization and treatment of ventricular fibrillation includes preprocessing a time series of an atrial fibrillation signal obtained from a patient, segmenting the time series of the AF signal into activation segments by the computer system, obtaining local activation waveforms (LAW) from the activation segments, determining degrees of similarity between the LAWs, and identifying one or more critical regions in the patient's atria if the LAWs have degrees of similarity exceeding a first threshold value.

Abstract: A computer-assisted method for quantitative characterization and treatment of ventricular fibrillation includes preprocessing a time series of an atrial fibrillation signal obtained from a patient, segmenting the time series of the AF signal into activation segments by the computer system, obtaining local activation waveforms (LAW) from the activation segments, determining degrees of similarity between the LAWs, and identifying one or more critical regions in the patient's atria if the LAWs have degrees of similarity exceeding a first threshold value.

Abstract: A hammock structure comprising an assembled frame and a detachable hammock. The frame includes two horizontal tubes for support on the ground, four L-shaped connecting tubes fitted respectively with two ends of each horizontal tube, four extension tubes fitted with the connecting tubes, two U-shaped tubes fitted with the ends of the extension tubes and two reinforcing chains connected between each two connecting tubes. The hammock includes two rod members each of which is formed with several through holes. A fastening hook is screwed into one end of each through hole to engage with a securing ring. A main cord at one end of the hammock is hung on the fastening hook, while a hanging cord is tied with each securing ring. Each hanging cord is further hung on a ring member to permit detachable engagement of the hammock on the frame.