I wasn't aware of your medical condition Kell, and I'm sorry to hear about it.
My limited understanding is that most pacemakers these days should not be affected by amateur level RF. If one is, it is most likely malfunctioning. But I am not a medical practioner or anything close to it, so don't go by my opinion. As your doctor if and when it comes to that point in time.
That aside, if you have good quality coax feeding the antenna, and the antenna is far enough away, I suspect transmitting would be unlikely to have a direct impact, as the field strength near you won't be that relatively high. Again, check with your doctor and with the manufacturer. But hell, you're a broadcast engineer (non practicing), so you already know this.
Also check into a remote-controlled rig. The TS-480S with a remote head comes to mind, as does a Ten-Tec Omni VII that can be completely controlled via it's Ethernet port, or so they tell me...