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2. Electrocardiography - Wikipedia

   en.wikipedia.org/wiki/Electrocardiography

   In a 12-lead ECG, all leads except the limb leads are assumed to be unipolar (aVR, aVL, aVF, V 1, V 2, V 3, V 4, V 5, and V 6). The measurement of a voltage requires two contacts and so, electrically, the unipolar leads are measured from the common lead (negative) and the unipolar lead (positive).

3. Holter monitor - Wikipedia

   en.wikipedia.org/wiki/Holter_monitor

   Each Holter system has hardware (called monitor or recorder) for recording the signal, and software for review and analysis of the record. There may be a "patient button" on the front that the patient can press at specific instants such as feeling/being sick, going to bed, taking pills, marking an event of symptoms which is then documented in the symptoms diary, etc.; this records a mark that ...

4. Cardiac monitoring - Wikipedia

   en.wikipedia.org/wiki/Cardiac_monitoring

   An example of automatic monitoring is the transtelephonic cardiac event monitor. This monitor contacts ECG technicians, via telephone, on a regular basis, transmitting ECG rhythms for ongoing monitoring. The transtelephonic cardiac event monitor can normally store approximately five "cardiac events" usually lasting 30–60 seconds.

5. Einthoven's triangle - Wikipedia

   en.wikipedia.org/wiki/Einthoven's_triangle

   If the arm electrodes are reversed, lead I changes polarity, causing lead II and lead III to switch. If the right arm electrode is reversed with the leg's electrode, lead II changes polarity, causing lead I to become lead III, and vice versa. Reversal of the left arm and leg causes a change in polarity of lead III and switching of leads I and ...

6. Automated ECG interpretation - Wikipedia

   en.wikipedia.org/wiki/Automated_ECG_interpretation

   The manufacturing industries of ECG machines is now entirely digital, and many models incorporate embedded software for analysis and interpretation of ECG recordings with 3 or more leads. Consumer products, such as home ECG recorders for simple, 1-channel heart arrhythmia detection, also use basic ECG analysis, essentially to detect abnormalities.

7. Monitoring (medicine) - Wikipedia

   en.wikipedia.org/wiki/Monitoring_(medicine)

   1. Clinical observation (one-to-one) 2. Pulse oximetry 3. Non-invasive blood pressure 4. ECG 5. Core temperature 6. End-tidal carbon dioxide (if tracheal tube or supraglottic airway device in situ) Additional monitoring which should be immediately available. 1. Blood/capillary glucose 2. Nerve stimulator Additional monitoring which should be ...