Depends on how severe your tremors are how much they will interfere with the EKG. But they don't look like skipped beats. It would look like the wires are being wiggled. Try to keep your arm/hand away from your chest & any part of the wires/leads. I'm sure it won't be the first time the cardiologist has had to deal with a tremor - they might take a longer reading than usual just to get a better idea of things, but you should be ok.