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Heart Rate
Male
30
article
24
heart rate
24
male
18
Animals
16
controlled study
16
Humans
14
Myocardial Contraction
14
Rats
14
heart
14
human
14
Animal
12
adult
12
animal experiment
12
physiology
12
rat
12
heart atrium
10
nonhuman
10
Adult
8
Heart
8
Middle Aged
8
Propranolol
8
Sympathetic Nervous System
8
animal
8
animal cell
8
heart muscle contractility
8
in vitro study
8
inotropism
8
priority journal
8
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5Publicado 1977
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