Interference from lawn mower
Recent recipient (9-17-18) of a Medtronic Quad CRT-D. Strange experience which maybe can be explained by someone with more "mileage" on their ICD than I.
CRT placement recommended as a result of A-Flutter which was converted in January. As a precaution the CRT was implanted.
A day or two before the surgery, I mowed our lawn ~ 1.5 acres with a Zero Turn, gasoline powered (B&S 22HP twin cylinder) and had absolutely nothing in the way of any discomfort, exertion, etc. I'm sitting and relaxing enjoying the ride and solitude. ;)
Then a week or so after the surgery, mindful of and following all medical precautions, I again mowed the lawn. I estimated that the distance between my device and the ignition components (high voltage) were > 24" with a partial shielding created by the seat of the mower. About 5 minutes or less into cutting the lawn, I felt a tightness in my chest and a feeling that I was exerting myself. I moved the seat of the mower to its foremost position to slightly increase the space between the engine and the device. This, and leaning forward a bit seemed to decrease the discomfort.
I completed the lawn and considered that there was some/enough stray EMF from the ignition that there could be interference to the device. Checking BP and Pulse rates after stopping and going in the house showed normal BP and Pulse but I still felt like I'd had a serious workout on the treadmill pushing towards maximum HR.
I fabricated a grounded (to the chassis) metal shield that fit over the engine and tried it again and again I went from feeling normal to having the feeling that I was exhausting myself on the treadmill.
When I spoke to the device nurse at the cardiologist's office she had no explanation and said that the CRT, if interfered with, would stop pacing and MAY provide a conversion shock thinking I was in VTAC, but should not cause the heart to race. At this time, they'd also had the results of a download from my device and said that my PVC's had increased instead of decreased and I was not pacing properly. Scheduled in to see Dr. in three days.
More info perhaps that anyone wants, but has anyone else experienced this sort of thing?
P.S. New member to this group and looking to participate and learn from others' experiences.