question: persistant intermittant episodes of chest spasms and trembling sensations around left lower pectorial region and upper rib cage....sometimes a week or 2 go by without symptons...then out of nowhere re-appear again...latest episode lasted 24 hours....had stress test 2 months ago and passed with flying colors...no history of heart problems ,am not over-weight and excercise regularly...I m 65 years old