title: Method for measuring the contractions of small hearts in organ culture.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D005333:Fetus; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D006339:Heart Rate / Q000187:drug effects; D008722:Methods; D051379:Mice; D009638:Norepinephrine / Q000494:pharmacology; D009924:Organ Culture Techniques; D013696:Temperature; D014159:Transducers
chemical_list: D000109:Acetylcholine; D002118:Calcium; D009638:Norepinephrine