What Causes Tightness And Pain In The Chest With Shortness Of Breath?

I had a police officer preemployment physical in Thursday and they said I was fine except that my ECG had an issue. They said my heartbeats were irregularly spaced and showed me the ECG. The first two were close together and the next two were far apart. The physician assistant said he needed to show the doctor who isn t in until Wednesday. They also said the machine pointed out the irregularity so he had to have the physician look at it. I have none of the symptoms he asked about like tightness in chest, pain in chest, shortness of breath or shortness of breath with exertion. I run multiple times a week and have physical training in the academy so I don t understand how I could be having heart problems since I m fairly healthy. I ve also had echos, ecgs and holter monitors before when I was hospitalized four years ago for migraines and nothing has ever come up before. Is this going to be something that makes me unable to be an officer? I have no issues with stress or exercise so I am just so surprised they said I had this and don t want it to prevent me from being in law enforcement.