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. Author manuscript; available in PMC: 2008 May 26.
Published in final edited form as: Magn Reson Med. 2007 May;57(5):891–897. doi: 10.1002/mrm.21215

FIG. 4.

FIG. 4

ECG waveform and corresponding R-R interval exhibiting significant R-R variation during a breath-hold for a patient corresponding to images shown in Fig 3. The R-R interval increased from 900 to 1305 ms.