Yutopar and premature labor

I was given Yutopar when I went into premature labor with my first son in 1992. When I went into premature labor with my secon son 2 years later, I was given brethine. My doctor said that Yutopar was taken off of the shelves because it had caused heart defects in the babies.
My first son has been diagnosed with Long QT Syndrome and has been placed on beta blocker medication. My other 2 children, my husband, and myself have not been diagnosed with genetic LQTS.
Is there any correlation between Long QT Syndrome and Yutopar? Please let me know...

In 1986 I was in premature labor with my son for 2 1/2 months I was in and out of the hospital on Yutopar either intraveneously or orally. My doctors kept increasing the dosage until I was taking 7 times the recommended dosage, 7 40 mg tablets every two hours. When I was taken off the drugs they discovered even though I had been in premature labor, my cervix would not dilate.They did a C section. When the cord was cut, my son's heart stopped beating, he was revived, he had severe hypoglycemia. He had no sugar in his system. My pediatrician told me it was the most traumatic birth he'd ever seen. Apparently the drug matured my placenta and it had died causing my son to loose weight. He went from an estimated 10 pounds while I was carrying him to a 6 lb birth weight.

In 1994 I had to have a hysterectomy. The doctors found out that one of my ovaries had been surgically removed and the tissue and uterus was necrotic. Since then my teeth had to be extracted because they became so brittle they started to break off. No decay, just kind of disintegrated.

My son has a high IQ, is very intelligent but does not apply himself, suffers from ADHD, hypoglycemia and some social skills.

I went into premature labor at 26 weeks .The doctor gave me 6 times the recomended dose to try and stop labor my child as gets older is having more learning problems .I was wondering what the long term side affects are in the child.