Snap stern when push my chest in front, pressure in chest, sometimes small chest pain in left side (like 2 secods intermittent) ecg ok in may, bp ok?

Press the: site of your pain. If you can elicit the same response, then its probably muscular. I see you 've listed ischemia as a condition. If you to have cardiac ischemia, see your cardiologist for further treatment ( left heart cath/stent placement).

Ribs: Your rib attachment at the sternum is the probable cause. The sternum has two parts that can move and then each rib attachment. It can just happen on its own or after chest trauma. It is of little concern. If it can be localized to a specific area then prolo therapy might tighten it up.