I am a stage 4 chronic kidney disease patient and my gfr is 10 but i don't feel sick and i am very active. is there any chance that i don't need dialysis or transplant in future?

Yes : Yes but only when the tachycardia is fast and not tolerated . But the electric current has to be synchronized with the heart beat.This is most appropriately called cardioversion than defibrillation the latter being unsynchronized electric shock for ventricular fibrillation which is a chaotic ineffective rhythm.

Unlikely: Kidney tends to be rather progressive after a given level. It is based upon the increased demand for the remaining kidney to continue to process the needs of a given amount of skeletal muscle. At age sixty, even if a small famle with a lower muscle mass than a similar sized male the amount of work needed to process would most likely wear out the kidney completely by average life expectancy.

Stage 4 CKD: One of your data points is wrong. Stage 4 chronic kidney disease (ckd) patients have a GFR between 15-29 ml/min, you say your GFR is 10 ml/min. Which of the two is correct? The reason you do not feel sick is that your body is quite used to your impaired kidney function. You should speak to your nephrologist to find out at what stage CKD you are at and preserve whatever kidney function you have.