I had a cardiac cath 2 days ago. The next morning I removed my dressing in the shower as instructed and felt fine, slight tenderness to the site. As I was trying to put my clothes on, I lifted my right leg and I had a "popping sensation" to my right groin that took me to the ground and I blacked out. I finally made it to the phone, called triage and they sent me to the ER. The ultra sound showed no bleeding or blood clot and I was told it was proababy a muscle spasm and to come back if it got worse. I've been on ibuprofen for 2 days with ice packs to the area and can barely walk. Is this normal? I'm supposed to return to work tomorrow and don't know if I can. My heart cath was completely normal.