 [ Symptoms ] i felt like electric shock like feeling which became sharp on my left chest [ Disease ] well in case if all the investigations like echo stress test etc are normal then you need not to worry about heart attack secondly heart attack commonly represent severe pressure compression like pain on chest slight elevation of st in v4 is commonly seen in young individuals so that is not an issue other causes of such symptoms can be nerve related pain musculoskeletal pain etc in case if there is repeated episodes of same symptoms consult a medicine specialist and get evaluated hope this information helps regards