adrenaline

aorta

beat

beats

dark

deep

fear

frightening

heart

heart beat

heartbeat

horror

scary

creepy

suspense

human

life

loop

loopable

monitor

multiple

pulsating

pulse

ominous

foreboding

pumping

rhythmical

tense

tension

throb

looped

sound

heart beating

reverb

hall

slow

pulsate

pump