text: Abnormalities in this organ can cause patients to experience "Tet spells" and become cyanotic.
full_question: Abnormalities in this organ can cause patients to experience "Tet spells" and become cyanotic. A syncytium ["sin-SIH-shee-um"] is formed from masses of cells that are separated by intercalated discs in this organ. Sotalol is one of the beta blockers that can be used to treat abnormal function of this organ. The foramen ovale fuses during this organ's development. The QRS complex and the T-wave are caused by this organ's depolarization and repolarization.  This organ's Purkinje fibres and bundles of His ["hiss"] carry electrical signals from the SA node. The vena cava carries deoxygenated blood to its right atrium. For 10 points, name this four-chambered organ that pumps blood.
first_sentence: Abnormalities in this organ can cause patients to experience "Tet spells" and become cyanotic.
raw_answer: the human heart