Actually, it's quite different. Pacemakers are vital to minute by minute survival. Insulin pumps are convenient for long-term survival. If an insulin pump quits

Actually, it's quite different. Pacemakers are vital to minute by minute survival. Insulin pumps are convenient for long-term survival. If an insulin pump quits working, it's inconvenient, but you notice it in a few hours after a blood test and compensate. If an insulin pump mistakenly gives too much insulin, you die within an hour.