Hi. Im a 22 year old girl with history of fainting, episodes of tachycardia, dizzynnes, etc. I got a holter monitor and several ekgs on The ER, where i used to go trying to catch an episode of tachycardia. I have notice that at least 4 of my ekgs show a prolonged qt interval, and no one mention it. The same with a 24 h holter monitor. I just dont understand why The Dr dismissed it. Maybe its because i dont hace a family history of SCA. My lastre ekg showed: HR: 116 bpm RR: 517 P:78ms PQ: 94 ms QRS: 94ms QT: 346 QTC:487ms As you see, its a long qt and i just understand how even a cardiologist brush this off. Another thing, its a holter monitor a validez test for long qt?