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.
in a nutshell. something that you say when you are describing something using as few words as possible Karen wants them to get married and buy a house and Mike wants them to carry on as they are and that, in a nutshell, is the problem. Well, to put it in a nutshell, we're going to have to start again.