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2. Advanced emergency medical technician - Wikipedia

   en.wikipedia.org/wiki/Advanced_emergency_medical...

   An advanced emergency medical technician (AEMT) is a provider of emergency medical services in the United States. A transition to this level of training from the emergency medical technician-intermediate , which have somewhat less training, [ 1 ] began in 2013 and has been implemented by most states [ citation needed ] .

3. Electrocardiography - Wikipedia

   en.wikipedia.org/wiki/Electrocardiography

   Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.

4. Signal-averaged electrocardiogram - Wikipedia

   en.wikipedia.org/wiki/Signal-averaged...

   Signal-averaged electrocardiography (SAECG) is a special electrocardiographic technique, in which multiple electric signals from the heart are averaged to remove interference and reveal small variations in the QRS complex, usually the so-called "late potentials".

5. 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 ...

6. Heart sounds - Wikipedia

   en.wikipedia.org/wiki/Heart_sounds

   Very faint, heard only after listener has "tuned in"; may not be heard in all positions. Only heard if the patient "bears down" or performs the Valsalva maneuver. Grade 2 Quiet, but heard immediately after placing the stethoscope on the chest. Grade 3 Moderately loud. Grade 4 Loud, with palpable thrill (a tremor or vibration felt on palpation) [4]