I had this, but it didn't mean a c section. They monitored me during labor, cardiologist was on call. Ended up with a c section though not heart related. I passed out while they were sewing me up, didn't wake up until it was all done. Spent 18 hours in the heart patient ward without further problems whatsoever.
I had a tachycardia and a c section, but they were completely unrelated.