Dispatched to memory care facility this morning for an 80's year old female complaining of abdominal pain, not alert. Patient was sitting up in a chair upon arrival with slurred speech (normal per staff). Staff states only history is hypertension. Patient was having abdominal pain and staff brought her to the restroom. Patient did not have a bowel movement. Patient brought back out to the lobby where she continued to have abdominal pain. Staff stated they obtained a radial pulse of 36 "4" times. In the ambulance abdomen palpated, no pain or guarding, no masses, however slightly distended. Vitals obtained. 166/90 pulse 60 spo2 88 on room air. O2 brought spo2 up to 96%. EKG performed (see attached). We did not have a medic at this time, this was the rhythm strip I obtained. Upon seeing that I requested a medic. 12 lead performed prior to medics arrival to have ready (Sorry, couldn't get a copy). 12 lead stated complete heart block, however the medic could not see it. Medics opinion was just sinus bradycardia. IV estabished TKO. Patients BP declined to 99/66 in short, 15 minute transport to the hospital. Any ideas on what this could have been?