A 66 year old woman with a nonischemic cardiomyopathy, LBBB received a CRT-D device 2 months ago. The device is programmed DDDR, 60-125 bpm. She is now hospitalized with pneumonia.
The most likely explanation for the above tracing is:
- Loss of RV capture.
- Sinus rate above upper limit.
- Loss of LV capture.
- Loss of both RV and LV capture.
- Pacemaker mediated tachycardia.
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