abstract
background
beam
beat
black
blue
cardiac
cardiogram
cardiograph
cardiologist
cardiology
chart
curve
death
diagnosis
display
ecg
effort
ekg
electrocardiogram
glow
graph
health
healthy
heart
heartbeat
hope
hospital
illness
illustration
laser
life
light
line
medicine
monitor
neon
power
pulsating
pulse
rhythm
screen
speed
surveillance
symbol
test
vitality
wave