That's crazy.....so is that the same thing as "heart pausing"....
Your doctor is probably thinking you are doing a vagal maneuver which we do when we go to the bathroom. We "bear down." This causes the heart to slow down by increasing intra-thoracic pressure. They actually teach you this for SVT or tachycardia. This particular maneuver is called Valsalva. Anyway, when you take a deep breath, you are also increasing intra-thoracic pressure so your body slows your heart down temporarily. This is normal. Most people who are not conscious of their hearts, like we are, never even feel this!