"A nurse is caring for a client with unstable v-tach. The nurse instructs the client to do which of the following, if prescribed, during an episode of v-tach?" The choices are: 1. lie down flat in bed 2. remove any metal jewelry 3. breathe deeply, regularly, and easily 4. inhale deeply and cough forcefully every 1 to 3 seconds The answer is 4. I want to know the rationale because it's not given.] Thank you all for your responses.