PACEMAKER INTERVENTION

The doctor usually decides when a permanent pacemaker should be inserted. Typically, a patient has cardiac problems which cause symptoms such as the ones described above. A 12 lead EKG and other studies are also done. If the patient's symptoms are considered an emergency, a temporary pacemaker or external pacing (TCP) may be used. These will be discussed in greater detail in a later chapter.
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http://www.dearnurses.com/ekg_series_-_what_is_wrong_with_this_ekg
and enjoy reading.