In atrial fibrillation, the electrical impulse of the heart is not regular. 1  Parts of the heart cannot contract in an organized pattern. 2  As a result, the heart cannot pump enough blood to meet the body's needs.
Synonyms, crossword answers and other related words for IN A NUTSHELL. summed up briefly; gave the facts in a nutshell; just tell me the story in a nutshell; explained the situation in a nutshell.
nuts. 1  Also, nerts, nertz. 2  insane; crazy. 3  be nuts about, to be extremely or excessively enthusiastic about; be fervent in one's admiration of: Both of them are nuts about chamber music. to be deeply in love with: He's nuts about his new girlfriend.