What Causes Arrhythmia Of Heart Along With Tightness In Chest?

IM CHECKING MY PULSE TONIGHT AND IT STOPS FOR 2 OR 3 SECONDS AND THEN STARTS AGAIN. I ALSO SEEM TO HAVE A HARD TIME BREATHING WHEN THIS HAPPENS , KINDA TIGHTNESS IN LEFT PART OF CHEST. THIS HAS BEEN GOING ON FOR YEARS BUT DOESNT HAPPEN ALL THE TIME ALTHOUGH FOR THE LAST COUOLE OF DAYS IVE NOTICED IT MORE. 6 WEEKS AGO I HAD A MINI STROKE WHICH GAVE ME DOUBLE VISION (SKEWED DEVIATION) MY VISION WAS MUCH BETTER BUT SEEMS TO BE RETURNING TO SOME DEGREE OF DOUBLE AGAIN.