ngoại tâm 
outside, exterior; unfaithfulness [ ngoại ] : foreign, imported, maternal side; over, past
[ tâm ] : mind, center, heart
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
ngoại tâm thu extrasystole ngoại tâm outside, exterior; unfaithfulness ngoại tâm thu extrasystole