Tham khảo tài liệu 'photodiodes communications bio sensings measurements and high energy part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The Photodiode Array A Critical Cornerstone in Cardiac Optical Mapping 151 Ischemia 10mins Ischemia 7mins Ischemia 3mins Control CaiT Duration I liiilBI irooDHi E 280-300 El 260-280 El 240-260 220-240 200-220 180-200 160-180 140-160 E 340-360 320-340 300-320 i - 5 I I iliillilil ii IL1 II1IIHBIII - -r a 3Ũ0-32D 280-300 260-280 240-260 220-240 280-300 260-280 240-260 220-240 200-220 180-200 360-380 340-360 320-340 300-320 Fig. 6. APD and CajT-D during normal perfusion and into ischemia. Scales to the right indicate the color of a given APD or CaiT-D. reproduced with permission from Lakireddy et al. 2005 . 152 Photodiodes - Communications Bio-Sensings Measurements and High-Energy Physics 4 00 12 00 Time sec Fig. 7. Concealed spontaneous calcium oscillations S-CaOs . Recordings were obtained from an experiment in which localized S-CaOs developed during an episode of selfterminating VF and continued uninterrupted after the resumption of spontaneous cardiac rhythm. Panel I illustrates the initiation of VF. Panel II shows recordings from three representative pixels marked by different colors in the map of the optical field seen to the right of the traces . After the self-termination of VF at approximately 12 seconds the majority of the optical field showed a pause with no electrical activity trace C of panel II while the localized S-CaOs continued. reproduced with permission from Lakireddy et al. 2006 . considered when interpreting intramural data El-Sherif 2007 . Photodiodes have played a dominant role in the construction of optrodes Caldwell et al. 2005 Kong et al. 2007 Byars et al. 2003 . Several groups have recently begun to use multiple cameras to simultaneously interrogate opposing sides of the ventricular wall Evertson et al. 2008 Kay Rogers 2006 Kay et al. 2004 Kay et al. 2006 Rogers et al. 2007 . In addition some of these groups use additional cameras to recreate the geometry of the heart in order to properly orient .
