Final answer:
IV Haldol is associated with prolonged QT interval, leading to torsades de pointes. It can also affect the nervous system's motor control regions, like the basal ganglia and the extrapyramidal system.
Step-by-step explanation:
IV Haldol related torsades de pointes is associated with prolonged QT interval, which is a heart rhythm condition that can lead to a form of ventricular tachycardia called torsades de pointes, a potentially life-threatening cardiac arrhythmia. Haldol, the trade name for haloperidol, is an antipsychotic medication that can affect the electrical activity of the heart, leading to increased risk of this condition. Additionally, side effects of haloperidol on the nervous system include changes in motor control, as can be seen in the case of an elderly woman who experienced difficulty controlling fine movements due to medication side effects. These motor control changes suggest that haloperidol can affect regions of the brain involved in the regulation of movement, such as the basal ganglia and the extrapyramidal system.