QT prolongation 是在 Hypomagnesemia 會產生的現象喔 (不是高血鎂)
Hypokalemia and hypomagnesemia can predispose to TdP. These disorders can occur together since hypomagnesemia directly causes hypokalemia. Hypocalcemia, alone or induced by hypomagnesemia, is a less common cause. (From UpTaDate)

回覆楊登堯先生:
您說得沒錯，如果只是suicidal ideation 其實尚不能強制住院
但如果已經出現suicide attempt 或經醫師評估有高危險自傷(殺)嫌疑 (這邊就是臨床醫師的臨床裁量權了)
通常是會收住院的

這個整理超棒!!!