what does heart massage mean?

HEART MASSAGE as NOUN

Meaning
- an emergency procedure that employs rhythmic compression of the heart (either through the chest wall or, during surgery, directly to the heart) in an attempt to maintain circulation during cardiac arrest
Synonym(s)
- cardiac massage (what does cardiac massage mean?)
Hypernyms(s) heart massage is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- emergency procedure (what does emergency procedure mean?)
- massage (what does massage mean?)