LOS ANGELES (Reuters) – Comedian and talk show host Rosie O'Donnell said on Monday she suffered a heart attack last week and had a stent inserted to treat a blocked artery. "I am lucky to be here", O'Donnell, 50, said in a blog entry called "my heart attack" on her Rosie.com website. The writer and comic said her chest began to ache last week, and she became nauseous and feverish after helping a woman who was struggling to get out of her car in her Nyack village home, near New York. After taking some aspirin, she went to see a cardiologist who "sent me to the hospital where a stent was put in. …