How high is too high (for heart rate)?

so obviously this is something I will be discussing with my EP, but just want to get a sense from this group — is there any criteria for when Afib with RVR truly is an emergency just based purely on the rate? There is so much conflicting information out there. For context, my last episode was 169 bpm but my only symptoms were racing heart, anxiety, and a little shortness of breath. Instinctually, that number seems alarming but I get the sense that the focus should be on the severity of the symptoms rather than the number itself — similar to the medical guidance about fever. Anybody been advised to go to the ER just based purely on the number?