When that happened, i always gave my patient the option for a 30 day monitor. In a few cases we implanted a loop recorder which usually lasted 1-2 years.They used a 48 hour Holter monitor on me and it was the only 48 hours I didn't have any PVC's. I bought a Kardia Mobil EKG and recorded the episodes for several days and showed them to the Cardiologist. My cardiologist went from "meh...it's normal" to "damn...that ain't right" in a hurry.
Edir: This was prior to Kardia and Apple watches did ekgs. The last few years I practiced patients emailed ekgs from their devices all the time. Many times it was a rhythm we called crapicardia (movement artifact, computers are not yet thet good at reading rhythms).