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.
Definition of bombshell. 1  1 : bomb 1a. 2  2a : one that is stunning, amazing, or devastating The book was a political bombshell.b : a person who is the cause and object of sensational and usually widespread attention, excitement, or attraction a blonde bombshell [=a glamorously attractive blonde woman]