After a year of working in a heart center institute, I found very essential to check on them from time to time. At times they experiences chest pain, dyspnea, stomach pain and many more. I know that one must perform keen assessment to know what they are going through. And at times, we checked on them very healthy but after a few minutes go into cardiac arrest. One reason to check is persistence of chest pain and when he goes into valsalava...that's why we usually give them stool softener to prevent them from straining.