I'm having these weird palpitations and transient jerks in my chest that last for a couple of seconds. They seem to happen randomly, and it's really unsettling because it feels like my heart stops during those moments. I exercise regularly and don't feel any chest pain, which is odd. My ECG, 2D ECHO, and HOLTER ECG came back normal, so now I'm left wondering. Could I have some kind of cardiac blockage? Are these jerks something I should worry about, like signs of a potential cardiac arrest or another serious heart issue? If it's none of those, what could possibly be causing these sensations?

Based on your normal ECG, 2D ECHO, and HOLTER ECG reports, it's unlikely that you have cardiac blockage or are at risk of cardiac arrest; the transient jerks and palpitations could be caused by benign conditions such as premature atrial contractions (PACs), premature ventricular contractions (PVCs), anxiety, stress, caffeine, or dehydration; to better understand the cause, consider consulting a cardiologist for further evaluation,