text: what causes a brief episode of cyanosis maybe lasting 20 seconds to a minute with palpitations and tingling ? i experience these brief episodes . i feel very anxious when i am having one {like i am dying}. after my heart slows down and my color comes back i feel shakey for about 30 minutes. i can't relate these episodes to any particular thing they just happen and they are very frightening. if you have experienced this or know someone who has please write me . thanks true cyanosis indicates that this part of your body is not getting enough blood. that's why it turns blue. you could have a heart problem. it is not unusual to have anxiety along with heart problems. go to your doctor right away to determine what's going on. you should not diagnose this yourself.