the.com/ekg
your heart's autobiography, written in volts and read in squiggles.
means a recording of the electrical signals that make your heart beat, used to spot rhythm problems, damage, or an attack in progress.
from from the german elektrokardiogramm, coined by willem einthoven around 1901, whose string galvanometer first turned heartbeats into readable lines and won him the 1924 nobel prize.
letter swapekg uses the german spelling, ecg the english one
waves namedp, q, r, s, t label each deflection
speed matterspaper runs at 25mm per second standard
twelve viewsstandard test uses 12 leads for full picture
for instance
einthoven's triangle — three limb electrodes forming the original 1901 measurement setup
holter monitor — portable ekg worn 24-48 hours, invented by norman holter in 1949
stress test ekg — recorded while walking on a treadmill to reveal hidden blockages