| first-degree heart block |
A heart block in which the conduction of impulses through the atrioventricular node is delayed but all atrial beats are followed by ventricular beats. It is recognized on the electrocardiogram by a prolonged P-R interval
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| first-generation cephalosporins |
Group of cephalosporin antibiotics capable of killing gram-positive cocci such as Staphylococcus aureus, streptococci, and some aerobic gram-negative rods. These agents are commonly used to treat skin and s
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| first a. |
the initial emergency care and treatment of an injured or ill person before definitive medical and surgical management can be secured.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| first arch c. |
Meckel's c.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| first arch s. |
anomalies, including macrostomia, hemignathia, and deformities of the external ear, resulting from an inhibitory process occurring toward the seventh week of embryonic life and affecting the facial bones derived from the first pharyngeal (branchial) arch.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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